1
                                                                     Exhibit 2.1
                              COMBINATION AGREEMENT
                                  by and among
                               PENTON MEDIA, INC.,
                             ▇-▇ ACQUISITION CORP.,
                              PITTWAY CORPORATION,
                       ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ PUBLISHING COMPANY,
                               ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                       and
                                 ▇▇▇▇ ▇. ▇▇▇▇▇▇
   2
                                TABLE OF CONTENTS
                                                                                                               Page
                                                                                                          
1        DEFINITIONS..............................................................................................1
2        THE COMBINATION.........................................................................................11
         2.1      The Merger.....................................................................................11
         2.2      The Closing....................................................................................11
         2.3      Actions at the Closing; Effective Time.........................................................12
         2.4      Effect of Merger...............................................................................12
                  (a)        General.............................................................................12
                  (b)        Articles of Incorporation...........................................................12
                  (c)        Bylaws..............................................................................12
                  (d)        Directors and Officers..............................................................12
                  (e)        Conversion of ▇-▇ Shares............................................................13
                  (f)        Conversion of Capital Stock of Combination Subsidiary...............................14
                  (g)        Contingent Cash Payment(s)..........................................................14
                  (h)        Guarantee of Value..................................................................17
                  (i)        Closing of Transfer Records.........................................................20
                  (j)        Delivery of Merger Consideration to Public Official.................................20
                  (k)        Lost, Stolen or Destroyed Certificates..............................................20
                  (l)        Transferability Restriction.........................................................20
                  (m)        Plan of Merger......................................................................20
3        REPRESENTATIONS AND WARRANTIES OF PENTON ...............................................................20
         3.1      Penton and Combination Subsidiary Organization and Qualification...............................20
         3.2      Penton and Combination Subsidiary Authority Relative to This Agreement.........................21
         3.3      Penton Constituent Instruments/Capitalization..................................................22
         3.4      Subsidiaries...................................................................................23
         3.5      Financial Statements...........................................................................23
         3.6      Absence of Undisclosed Liabilities.............................................................24
         3.7      No Material Adverse Change.....................................................................24
         3.8      Litigation.....................................................................................24
         3.9      Brokerage......................................................................................24
         3.10     Employees; Retiree Welfare Benefit Liabilities.................................................24
         3.11     Compliance with Laws; Permits; Certain Operations..............................................24
         3.12     Affiliate Transactions.........................................................................25
         3.13     Tax Status of Spinoff; Tax Matters Related to the Merger.......................................25
4        REPRESENTATIONS AND WARRANTIES OF THE ▇-▇ SHAREHOLDERS..................................................25
         4.1      ▇-▇ Organization and Qualification.............................................................26
         4.2      Authority Relative to This Agreement...........................................................26
         4.3      Investment.....................................................................................27
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         4.4      ▇-▇ Constituent Instruments/Capitalization.....................................................27
         4.5      Subsidiaries...................................................................................28
         4.6      Title to Assets................................................................................28
         4.7      Sufficiency of Assets..........................................................................28
         4.8      Financial Statements...........................................................................28
         4.9      Absence of Undisclosed Liabilities.............................................................29
         4.10     No Material Adverse Change.....................................................................29
         4.11     Litigation.....................................................................................29
         4.12     Brokerage......................................................................................29
         4.13     Employees; Retiree Welfare Benefits Liabilities................................................29
         4.14     Compliance with Laws; Permits; Certain Operations..............................................29
         4.15     Affiliate Transactions.........................................................................30
         4.16     Tax Status of Merger...........................................................................30
5        REPRESENTATIONS AND WARRANTIES OF PITTWAY...............................................................30
         5.1      Organization and Qualification.................................................................30
         5.2      Authority Relative to This Agreement...........................................................30
         5.3      Brokerage......................................................................................31
         5.4      Affiliate Transactions.........................................................................31
6        CONDUCT OF BUSINESS PENDING THE MERGER..................................................................32
         6.1      Conduct of Penton Business Pending the Merger..................................................32
         6.2      Conduct of ▇-▇ Business Pending the Merger.....................................................33
7        ADDITIONAL AGREEMENTS...................................................................................35
         7.1      Access and Information; Corporate Records; Confidentiality.....................................35
         7.2      Registration Rights; Certain Filings...........................................................36
                  (a)        Demand Registration.................................................................36
                  (b)        Piggyback Registrations.............................................................37
                  (c)        Registration Covenants..............................................................38
                  (d)        Holdback Agreements.................................................................39
                  (e)        Indemnification Relating to Registrations...........................................40
                  (f)        Resale Restrictions.................................................................42
                  (g)        Obligation of the ▇-▇ Shareholders to Supply Information............................43
                  (h)        Obligation of Penton to Supply Information..........................................43
                  (i)        Obligation to Deliver Certain Filings...............................................44
         7.3      Other Necessary Action; Further Assurance......................................................44
         7.4      Certain Tax Matters............................................................................45
         7.5      No Negotiations, etc...........................................................................46
         7.6      Expenses.......................................................................................47
         7.7      Indemnification and Hold Harmless Agreements...................................................47
                  (a)        Penton Indemnification Provisions for Benefit of the ▇-▇
                             Shareholders........................................................................47
                                     - ii -
   4
                                                                                                          
                  (b)        ▇-▇ Shareholders Indemnification Provisions for Benefit of
                             Penton and Combination Subsidiary...................................................47
                  (c)        Pittway Indemnification Provisions for Benefit of Penton............................48
                  (d)        Penton Indemnification Provisions for Benefit of Pittway............................49
                  (e)        ▇-▇ Shareholders Indemnification Provisions for Benefit of
                             Pittway.............................................................................50
                  (f)        Matters Involving Third Parties.....................................................50
                  (g)        Determination of Adverse Consequences...............................................51
                  (h)        Determination of Indemnification Remedies...........................................51
                  (i)        Limitations.........................................................................51
                  (j)        Basket for Certain Indemnification Claims...........................................52
         7.8      Employee Matters...............................................................................52
                  (a)        Employee Benefit Liabilities........................................................52
                  (b)        Penton Pension Plans................................................................53
                  (c)        Penton Employee Welfare Benefit Plans...............................................55
                  (d)        Disputed Employee Benefit Claims....................................................56
                  (e)        Workers' Compensation Claims........................................................56
                  (f)        Penton 1998 Stock Awards Plan.......................................................56
                  (g)        ▇▇▇▇▇▇ ▇▇▇▇ Director Stock Option Plan..............................................56
                  (h)        Penton SERP.........................................................................56
                  (i)        Coverage of Surviving Corporation's Employees.......................................57
         7.9      Update of Disclosure Letters...................................................................57
         7.10     Agreement Regarding Distribution of Penton Common on Certain
                  Pittway Shares.................................................................................57
         7.11     Agreement Regarding Transitional Services......................................................58
         7.12     Agreement Regarding Post-Spinoff Tax Returns and Other Post-
                  Spinoff Tax Matters............................................................................58
         7.13     ▇-▇ Shareholders Non-Compete, Non-Solicitation.................................................59
         7.14     Penton Directors...............................................................................60
         7.15     Post-Effective Time Cash Contributions/Return..................................................60
         7.16     Post-Effective Time Receivables Collection.....................................................61
8        CONDITIONS..............................................................................................62
         8.1      Conditions to Obligations of Each Party........................................................62
         8.2      Additional Conditions to Obligations of ▇-▇ and the ▇-▇
                  Shareholders...................................................................................64
         8.3      Additional Conditions to Obligations of Penton and Combination
                  Subsidiary.....................................................................................67
         8.4      Additional Conditions to Obligation of Pittway.................................................69
9        TERMINATION, AMENDMENT AND WAIVER.......................................................................71
         9.1      Termination....................................................................................71
         9.2      Effect of Termination..........................................................................71
         9.3      Amendment......................................................................................72
                                     - iii -
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         9.4      Waiver.........................................................................................72
10       GENERAL PROVISIONS......................................................................................72
         10.1     Survival of Representations and Warranties.....................................................72
         10.2     Public Statements..............................................................................73
         10.3     Designation of ▇-▇ Shareholders as Representative..............................................73
         10.4     Notices........................................................................................73
         10.5     Interpretation.................................................................................74
         10.6     Severability...................................................................................75
         10.7     Disputes.......................................................................................75
         10.8     Jurisdiction and Service of Process............................................................76
         10.9     Miscellaneous..................................................................................77
                                     - iv -
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                                    EXHIBITS
         Exhibit A -    Articles of Incorporation of Combination Subsidiary
         Exhibit B -    By-Laws of Combination Subsidiary
         Exhibit C -    Post-Spinoff Amended and Restated Certificate of 
                        Incorporation of Penton
         Exhibit D -    Post-Spinoff Bylaws of Penton
         Exhibit E -    Form of Employment Agreement between ▇▇▇▇▇▇▇ and ▇▇▇▇▇▇
         Exhibit F -    Form of Employment Agreement between ▇▇▇▇▇▇ and Penton
                               DISCLOSURE LETTERS
         Penton Disclosure Letter Captions
                  Authority
                  Capitalization
                  Joint Ventures
                  Liabilities
                  Litigation
                  Compliance with Laws
                  Affiliate Transactions
                  Taxes
                  Possible Dispositions
         ▇-▇ Shareholders Disclosure Letter Captions
                  Authority
                  Security Interests
                  Sufficiency of Assets
                  Liabilities
                  Litigation
                  Compliance with Laws
                  Affiliate Transactions
         Pittway Disclosure Letter Captions
                  Authority
                  Affiliate Transactions
                                      - v -
   7
                              COMBINATION AGREEMENT
                  COMBINATION AGREEMENT dated as of May 21, 1998 (this
"AGREEMENT"), by and among Penton Media, Inc., a Delaware corporation 
("PENTON"), ▇-▇ Acquisition Corp., an Illinois corporation ("COMBINATION
SUBSIDIARY") that is a wholly-owned direct subsidiary of Penton, Pittway
Corporation, a Delaware corporation ("PITTWAY") of which Penton is a
wholly-owned direct subsidiary, ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ Publishing Company, an Illinois
Corporation ("▇-▇"), and ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ ("▇▇▇▇▇▇▇") and ▇▇▇▇ ▇. ▇▇▇▇▇▇
("▇▇▇▇▇▇") (collectively, the "▇-▇ SHAREHOLDERS"), the owners of all of the     
outstanding capital stock of ▇-▇. Penton, Combination Subsidiary, Pittway, D-M
and the ▇-▇ Shareholders are referred to collectively herein as the "PARTIES."
                  Penton and the ▇-▇ Shareholders desire to cause a business
combination of ▇-▇ with Penton through the merger of ▇-▇ with and into
Combination Subsidiary in which the ▇-▇ Shareholders receive stock of Penton,
cash and additional contingent consideration, on the terms set forth in this
Agreement. The combination is contingent upon the distribution of all of the
outstanding capital stock of Penton to the stockholders of Pittway (the
"SPINOFF") and also upon the other conditions set forth in this Agreement.
                  The Parties intend (a) that the Spinoff qualify as a tax-free
(to Pittway and the stockholders of Pittway) distribution under the provisions
of Section 355 of the Code (as defined herein) and (b) that the merger of ▇-▇
with and into Combination Subsidiary constitute a "reorganization" within the
meaning of Section 368(a) of the Code.
                  Now, therefore, in consideration of the premises and the
mutual promises herein made, and in consideration of the representations,
warranties, and covenants herein contained, the Parties hereby agree as follows:
                                    ARTICLE 1
                                   DEFINITIONS
                  "ACCREDITED INVESTOR" has the meaning set forth in Regulation
D promulgated under the Securities Act.
                  "ADJUSTED ▇-▇ LIABILITIES" means the payables and accrued
liabilities of ▇-▇ that exist immediately prior to the Effective Time that are
then recorded (or required to be recorded in accordance with ▇-▇'s historic
practice as reflected in the ▇-▇ Financial Statements) on the books of ▇-▇,
exclusive of any such payables and accrued liabilities related to Business
Information Products for which revenues would not be recognized until after the
Effective Time under ▇-▇'s historic practice as reflected in the ▇-▇ Financial
Statements.
   8
                  "ADVERSE CONSEQUENCES" means all charges, complaints, actions,
suits, proceedings, hearings, investigations, claims, demands, judgments,
orders, decrees, stipulations, injunctions, damages, dues, interest, penalties,
fines, costs, amounts paid in settlement, Liabilities, obligations, Taxes,
liens, losses, reasonable expenses and fees (including reasonable attorneys'
fees), and court costs. In calculating any damage or loss claimed to have been
suffered by any ▇-▇ Shareholder for purposes of Section 7.7: (i) no account
shall be taken of the effect of the occurrence, act, omission or state of facts
underlying such claim on the value of the shares of Penton Common to which such
damage or loss relates except to the extent such effect is reflected in the
market price of such shares at the time of such claim, whether or not such
effect is foreseeable or determinable at the time of such claim; (ii) such
damage or loss shall include any decline in the market price of the shares of
Penton Common to which such damage or loss relates that is attributable to any
Penton indemnification with respect to such damage or loss; and (iii) any
payment (in cash or shares of Penton Common) to such ▇-▇ Shareholder pursuant to
Section 2.4(h) for or with respect to the shares of Penton Common to which such
damage or loss relates shall be taken into account.
                  "ADVERSE ▇-▇ CHANGE" means any change since December 31, 1997,
other than a change contemplated in this Agreement, which has an adverse effect
on the business (taking into account prospects), financial condition, assets or
results of operations of ▇-▇.
                  "ADVERSE PENTON CHANGE" means any change since December 31,
1997, other than a change contemplated in this Agreement, which has an adverse
effect on the business (taking into account prospects), financial condition,
assets or results of operations of Penton and its Subsidiaries, considered as
whole.
                  "AFFILIATE" means, with respect to any Person, any Person
controlling, controlled by or under common control with such Person. In any
event, each ▇-▇ Shareholder shall be deemed to be an Affiliate of the other ▇-▇
Shareholder and of ▇-▇, and ▇-▇ shall be deemed to be an Affiliate of each ▇-▇
Shareholder.
                  "AFFILIATED GROUP" means any affiliated group within the
meaning of Code Section 1504 (or any analogous combined, consolidated or unitary
group defined under state, local or foreign income Tax law).
                  "ARTICLES OF MERGER" has the meaning set forth in Section 2.3.
                  "AVERAGE MARKET PRICE" during any period means (i) the
numerical average of the closing prices of Penton Common on the principal
securities exchange or trading system on which such security is then traded on
the days during such period on which Penton Common is traded thereon; or (ii) if
Penton Common is not traded on a securities exchange or trading system during
such period, the numerical average of the last quoted sale prices (or, if not so
quoted, the averages of the high bid and low asked prices) of Penton Common in
the over-the-counter market on the days during 
                                      -2-
   9
such period for which such prices are available; or (iii) if Penton Common is
not traded on a securities exchange or trading system or in the over-the-counter
market during such period, the market value of Penton Common at the midpoint of
such period, as determined by an investment banking firm of recognized standing
that is not an investment banking firm of Penton or any of its Affiliates
jointly retained by Penton and the ▇-▇ Shareholders (or, if they are unable to
agree on the choice of such a firm, a firm selected by lot from four such firms
that are willing to serve, two of which shall be designated by Penton and two of
which shall be designated by the ▇-▇ Shareholders).
                  "BUSINESS INFORMATION PRODUCT" means a magazine, special
issue, catalogue, directory, newsletter, card deck, electronic/internet product,
trade show, exposition, conference or ancillary product.
                  "CLOSING" has the meaning set forth in Section 2.2.
                  "CODE" means the Internal Revenue Code of 1986, as amended,
and regulations issued thereunder.
                  "COMBINATION SUBSIDIARY" has the meaning set forth in the
preface to this Agreement.
                  "COMMISSION" means the Securities and Exchange Commission.
                  "CONFIDENTIALITY AGREEMENT" means the Confidentiality and
Non-Disclosure Agreement dated August 15, 1997 between Penton, ▇▇▇▇▇▇▇ and
▇▇▇▇▇▇.
                  "CONTINGENT CASH PAYMENT" has the meaning set forth in Section
2.4(g)(i).
                  "CONTROL" means direct ownership of stock possessing at least
eighty percent (80%) of the total combined voting power of all classes of stock
entitled to vote and at least eighty percent (80%) of the total number of shares
of each and all other classes of stock (for purposes of which ownership shall
not include voting stock if rights to vote such stock (or to restrict or
otherwise control the voting of such stock) are held by a third party (including
a voting trust) other than an agent).
                  "CONTROL GROUP LIABILITY" means any joint and several
Liability imposed by law on entities that are Affiliates of each other.
                  "CORPORATE RECORDS" means books, ledgers, files,
correspondence, lists, Tax Returns, declarations of estimated Tax, contracts,
commitments and records (whether stored in written form, on computer disks, on
microfiche or other medium).
                  "COVERED PENTON EMPLOYEES/DEPENDENTS" means individuals who
are, immediately prior to the Effective Time, employees or former employees of
Penton and its then or former Subsidiaries (other than former Subsidiaries
Saddlebrook Resorts, 
                                      -3-
   10
Inc., Saddlebrook International Tennis, Inc., C&A Investments, Inc. and Pittway
Real Estate, Inc., each a Florida corporation) and their respective
predecessors, and their spouses and eligible dependents.
                  "▇▇▇▇▇▇ & ▇▇▇▇▇" means ▇▇▇▇▇▇ & ▇▇▇▇▇/Peneco, Inc., a Florida
corporation.
                  "DEFINED BENEFIT PLAN" has the meaning set forth in Section
3(35) of ERISA.
                  "DEFINED CONTRIBUTION PLAN" has the meaning set forth in
Section 3(34) of ERISA.
                  "DELAWARE CORPORATION LAW" means the General Corporation Law
of the State of Delaware, as amended from time to time.
                  "DEMAND REGISTRATION" has the meaning set forth in Section
7.2(a).
                  "DISTRIBUTED ▇-▇ ACCOUNTS RECEIVABLE" has the meaning set
forth in Section 6.2 
                  "▇-▇" has the meaning set forth in the preface to this
Agreement.
                  "▇-▇ COMMON STOCK" means Common Stock - Series A, without par
value, of ▇-▇.
                  "▇-▇ FINANCIAL STATEMENTS" has the meaning set forth in
Section 4.8.
                  "▇-▇ INSIDERS" has the meaning set forth in Section 4.15.
                  "▇-▇ OWNERSHIP FRACTION" means, with respect to each ▇-▇
Shareholder, the fraction of which the numerator is the number of shares of ▇-▇
Common Stock outstanding immediately prior to the Effective Time owned by such
▇-▇ Shareholder and the denominator is the total number of shares of ▇-▇ Common
Stock outstanding immediately prior to the Effective Time.
                  "▇-▇ SHAREHOLDERS" has the meaning set forth in the preface to
this Agreement.
                  "▇-▇ SHAREHOLDERS DISCLOSURE LETTER" has the meaning set forth
in Section 4.2.
                  "▇▇▇▇▇▇▇" has the meaning set forth in the preface to this
Agreement.
                  "EFFECTIVE TIME" has the meaning set forth in Section 2.3.
                                      -4-
   11
                  "EMPLOYEE PENSION BENEFIT PLAN" has the meaning set forth in
Section 3(2) of ERISA.
                  "EMPLOYEE WELFARE BENEFIT PLAN" has the meaning set forth in
Section 3(1) of ERISA.
                  "EMPLOYMENT AGREEMENTS" has the meaning set forth in Section
8.1(o).
                  "EQUITY INFORMATION" means Equity Information Exchange
Limited, a U.K. corporation.
                  "ERISA" means the Employee Retirement Income Security Act of
1974, as amended.
                  "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
amended.
                  "EXISTING PENTON SUBSIDIARIES" means Combination Subsidiary,
▇▇▇▇▇▇ & ▇▇▇▇▇, Equity Information, Index, Penton Media and Service Exhibitions.
                  "FIRST REFERENCE PERIOD" means the period of thirty days
following the Penton 1999 Earnings Release Date.
                  "GOVERNMENTAL ACTIONS" means all authorizations, consents,
approvals, waivers, exceptions, variances, franchises, permissions, permits and
licenses of, and filings and declarations with, by or in respect of, any
Governmental Authority.
                  "GOVERNMENTAL AUTHORITY" means any United States (federal,
state or local) or non-United States governmental Person, authority or agency,
court or regulatory commission or stock exchange or other self-regulatory body,
whether governmental or private.
                  "GUARANTEED AVERAGE MARKET PRICE" means $29.0 million divided
by the number of Merger Shares.
                  "▇▇▇▇-▇▇▇▇▇-▇▇▇▇▇▇ ACT" means the ▇▇▇▇-▇▇▇▇▇-▇▇▇▇▇▇ Antitrust
Improvements Act of 1976, as amended.
                  "ILLINOIS CORPORATION LAW" means the Business Corporation Act
of 1983 of the State of Illinois, as amended from time to time.
                  "INDEX" means Independent Exhibitions Limited, a U.K.
corporation.
                  "INTELLECTUAL PROPERTY" means all (a) patents, patent
applications, patent disclosures, and improvements thereto, (b) trademarks,
service marks, trade dress, logos, trade names, business names and corporate
names and registrations and 
                                      -5-
   12
applications for registration thereof, (c) copyrights and registrations and
applications for registration thereof, (d) mask works and registrations and
applications for registration thereof, (e) computer software (and any source
code thereto), data and documentation, (f) trade secrets and confidential
business information (including ideas, formulas, compositions, inventions
(whether patentable or unpatentable and whether or not reduced to practice),
know-how, techniques, research and development information, software products in
development, drawings, specifications, designs, plans, manuals, proposals,
technical data, copyrightable works, financial, marketing, and business data,
pricing and cost information, business and marketing plans, and customer and
supplier lists and information), (g) other proprietary rights, (h) rights to
register or apply for registration of any of the foregoing, (i) copies and
tangible embodiments of any of the foregoing (in whatever form or medium) and
(j) other rights with respect to any of the foregoing.
                  "IRS" means the Internal Revenue Service.
                  "KNOWLEDGE" means actual knowledge.
                  "KNOWLEDGE OF PENTON" means Knowledge of any of ▇▇▇▇▇▇ ▇.
▇▇▇▇, ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ and ▇▇▇▇▇▇▇ ▇. Vice, without independent investigation.
                  "KNOWLEDGE OF PITTWAY" means Knowledge of any of King Harris,
▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ and ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇, without independent investigation.
                  "KNOWLEDGE OF THE ▇-▇ SHAREHOLDERS" means Knowledge of either
of the ▇-▇ Shareholders, after due inquiry of ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, ▇-▇'s current
Office Manager, and ▇▇▇ ▇▇▇▇▇▇, ▇-▇'s current accountant, but without any other
independent investigation.
                  "LETTER OF INTENT" means the Letter of Intent dated November
21, 1997 by and among Penton and the ▇-▇ Shareholders.
                  "LIABILITY" means any liability of any nature (whether known
or unknown, accrued or unaccrued, absolute or contingent, liquidated or
unliquidated, asserted or unasserted, ▇▇▇▇▇▇ or inchoate, due or to become due,
or otherwise), including any liability for Taxes.
                  "MATERIAL ADVERSE EFFECT" means, with respect to any Person, a
material adverse effect on the financial condition, assets, business, or results
of operations of such Person. When used with respect to Penton, Material Adverse
Effect means a Material Adverse Effect on Penton and its Subsidiaries considered
as a whole; and when used with respect to Pittway, Material Adverse Effect means
a Material Adverse Effect on Pittway and the Post-Spinoff Pittway Subsidiaries
considered as a whole.
                  "▇▇▇▇▇▇" has the meaning set forth in the preface to this
Agreement.
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   13
                  "MERGER" has the meaning set forth in Section 2.1.
                  "MERGER SHARES" means the shares of Penton Common issued to
the ▇-▇ Shareholders pursuant to Section 2.4(e)(ii)(A).
                  "1989 MERGER AGREEMENT" has the meaning set forth in Section
7.10.
                  "OLD PITTWAY" has the meaning set forth in Section 7.10.
                  "ORDINARY COURSE OF BUSINESS" with respect to any Person(s)
means the ordinary course of business of such Person(s) consistent with past
custom and practice of such Person(s) (including with respect to quantity and
frequency).
                  "OUTSTANDING EFFECTIVE TIME SHARES" means the number of shares
of Penton Common to be outstanding immediately after the Effective Time,
including the Merger Shares. It is expressly understood, however, that neither
shares contingently issuable under Section 2.4(h), shares issuable under
employee benefit plans as contemplated in Section 7.8, shares issuable under
options, warrants or other agreements, arrangements or commitments set forth
under the caption "Capitalization" in the Penton Disclosure Letter nor shares
issuable in connection with acquisitions referred to in the final paragraph of
Section 6.1 shall be counted as shares of Penton Common that are outstanding for
purposes of determining the Outstanding Effective Time Shares.
                  "PARTIES" has the meaning set forth in the preface to this
Agreement.
                  "PENTON " has the meaning set forth in the preface to this
Agreement.
                  "PENTON COMMON" means Common Stock, par value $.01 per share,
of Penton.
                  "PENTON DISCLOSURE LETTER" has the meaning set forth in
Section 3.2.
                  "PENTON FINANCIAL STATEMENTS" has the meaning set forth in
Section 3.5.
                  "PENTON 401(K) PLAN" has the meaning set forth in Section
7.8(b).
                  "PENTON INSIDERS" has the meaning set forth in Section 3.12.
                  "PENTON MEDIA" means Penton Media Limited, a U.K. corporation.
                  "PENTON 1998 DIRECTOR STOCK OPTION PLAN" means a stock option
plan under which non-employee directors of Penton may be awarded options to
purchase Penton Common.
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   14
                  "PENTON 1998 STOCK AWARDS PLAN" means an equity awards plan
(and programs thereunder) similar to the Pittway Corporation 1990 Stock Awards
Plan, as amended (and Pittway's programs thereunder), except that such plan may
include a special performance-related compensation program for Penton's top
executive officers.
                  "PENTON 1999 EARNINGS RELEASE DATE" means the date on which
Penton publicly releases its financial results for calendar year 1999.
                  "PENTON PENSION PLAN" has the meaning set forth in Section
7.8(b).
                  "PENTON RETIREE LIFE INSURANCE" means the Penton Retiree Life
Insurance Benefit portion of the Basic Group Life, Optional Life and AD&D Plan
for Employees of Pittway Corporation.
                  "PERSON" means an individual, a partnership, a corporation, a
limited liability company, an association, a joint stock company, a trust, a
joint venture, an unincorporated organization and a Governmental Authority.
                  "PIGGYBACK REGISTRATION" has the meaning set forth in Section
7.2(b).
                  "PITTWAY" has the meaning set forth in the preface to this
Agreement.
                  "PITTWAY BLUE CHIP PLAN" means the Pittway Corporation Blue
Chip Profit Sharing and Savings Plan, as amended.
                  "PITTWAY DISCLOSURE LETTER" has the meaning set forth in
Section 5.2.
                  "PITTWAY 501(C)(9) TRUST" means the Pittway Corporation
Welfare Benefits Trust.
                  "PITTWAY INSIDERS" has the meaning set forth in Section 5.4.
                  "PITTWAY RETURNS" has the meaning set forth in Section 7.12.
                  "PITTWAY SALARIED PLAN" means the Pittway Corporation
Retirement Plan for Salaried Employees, as amended.
                  "POST-SPINOFF PITTWAY SUBSIDIARIES" means the Subsidiaries of
Pittway immediately after the consummation of the Spinoff.
                  "REGISTRATION EXPENSES" means all expenses incident to
Penton's performance of or compliance with Sections 7.2(a), (b) and (c), as
applicable, including without limitation all registration and filing fees, fees
and expenses of compliance with securities or blue sky laws, printing expenses,
messenger and delivery expenses, and fees and disbursements of counsel for
Penton and all independent certified public 
                                      -8-
   15
accountants, underwriters (excluding discounts and commissions) and other
Persons retained by Penton. Registration Expenses shall not include fees and
disbursements of counsel for the holders of Registrable Shares or fees and
disbursements of any other Persons retained by the holders of Registrable
Shares.
                  "REGISTRABLE SHARES" means (i) the Merger Shares and (ii) any
Penton Common issued or issuable with respect to the shares described in (i)
above by way of a stock dividend or stock split or in connection with a
combination of shares, recapitalization, merger, consolidation or other
reorganization. As to any particular Registrable Shares, such securities will
cease to be Registrable Shares when they have been distributed to the public
pursuant to an offering registered under the Securities Act or transferred in a
transaction exempt from registration under the Securities Act; provided that in
the event either ▇-▇ Shareholder transfers as a block in a transaction exempt
from registration under the Securities Act all of the Merger Shares issued to
him, such Merger Shares shall not thereupon cease to be Registrable Shares, but
shall thereafter continue to be subject to the foregoing cessation provisions.
                  "RULING" means the private letter ruling dated May 8, 1998
received by Pittway from the IRS to the effect, among others, that the Spinoff
will constitute a tax-free (to Pittway and the stockholders of Pittway)
distribution under Section 355 of the Code.
                  "SECOND REFERENCE PERIOD" means the period of thirty days
ending on the second anniversary of the Effective Time.
                  "SECURITIES ACT" means the Securities Act of 1933, as amended.
                  "SECURITY INTEREST" means any mortgage, pledge, security
interest, encumbrance, charge, or other lien, any claim of any third party, or
any voting rights of any third party.
                  "SERVICE EXHIBITIONS" means Service Exhibitions Limited, a
U.K. corporation.
                  "SPINOFF" has the meaning set forth in the preface to this
Agreement.
                  "SUBSIDIARY" means, with respect to any particular parent
business entity, any business entity of which such parent business entity and/or
one or more business entities which are themselves Subsidiaries of such parent
business entity, (i) in the case of a corporation, have the power to vote or
direct the voting of sufficient securities to elect a majority of the directors
of such corporation and (ii) in the case of all other Persons, own an interest
in such Person which permits the owner thereof to control the management of such
Person.
                                      -9-
   16
                  "SURVIVING CORPORATION" has the meaning set forth in Section
2.1.
                  "SURVIVING CORPORATION'S PRE-TAX PROFITS" for any calendar
year means the sum of (i) Surviving Corporation's net income for such calendar
year PLUS (ii) Surviving Corporation's income Taxes deducted in determining such
net income (in the case of calendar year 1998, including ▇-▇'s net income
(excluding interest income) for the portion of such calendar year prior to the
Effective Time and taking into account ▇-▇'s income Taxes deducted in
determining such net income), determined in accordance with generally accepted
accounting principles applied on the same basis as in the preparation of the ▇-▇
Financial Statements, subject to the following adjustments and understandings:
(a) depreciation expense will be determined as if there were no writeup of the
value of the Surviving Corporation's assets as a result of the Merger, and the
goodwill and other intangibles resulting from the Merger will not be amortized;
(b) any funds provided to the Surviving Corporation by Penton, whether as
capital or as a loan or advance, will be deemed provided without charge except
in the event that the amount of such funds outstanding at any time (net of
repayments thereof) exceeds the amount of funds withdrawn from the Surviving
Corporation by Penton, other than as payment for products or services provided
or as repayment of funds provided, then outstanding (net of repayments thereof)
-- in which event such excess will be deemed lent to the Surviving Corporation
at an interest rate per annum equal to Penton's blended borrowing rate (or such
lower borrowing rate, if any, as is available to the Surviving Corporation on a
stand-alone basis from Persons other than the ▇-▇ Shareholders or their
Affiliates for a borrowing in the same amount) from time to time; (c) to the
extent that services of a type ▇-▇ currently obtains from an outside supplier
(e.g., services of a professional, an insurance broker or a printer) are
obtained from Penton, or from another outside supplier, at the direction of
Penton or of the Surviving Corporation's Board of Directors, such services will
be deemed provided at a cost equal to the lesser of the amount actually charged
to ▇-▇ for such services or the amount that would have been charged to ▇-▇ for
such services by ▇-▇'s current supplier; (d) to the extent that general and
administrative services of Penton's internal staff (e.g., accounting and
employee benefits) are provided at the direction of Penton or of the Surviving
Corporation's Board of Directors, such services will be deemed provided at a
cost equal to the lesser of Penton's allocated cost to provide them or ▇-▇'s
cost of providing such services under its current operation; provided that so
long as ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, ▇-▇'s current Office Manager, continues to be employed
by the Surviving Corporation, accounting services of Penton's internal staff
will be deemed provided at no cost; (e) any other business transactions between
the Surviving Corporation and Penton or any of its other Subsidiaries or
Affiliates will be accounted for on an arm's-length basis; (f) the salary of
▇▇▇▇▇▇▇ and ▇▇▇▇▇▇ paid or accrued as Penton executives will be charged to the
Surviving Corporation; (g) any amounts paid or accrued under Penton employee
benefit plans and programs with respect to ▇▇▇▇▇▇▇, ▇▇▇▇▇▇ and employees of the
Surviving Corporation (including, except in the cases of ▇▇▇▇▇▇▇ and ▇▇▇▇▇▇, any
such amounts related to equity-based compensation) will be charged to the
Surviving Corporation, provided that such charges will not exceed, on a per
employee per annum basis, the charges per 
                                      -10-
   17
employee per annum paid or accrued under ▇-▇ benefit plans and programs during
1997 and reflected in the ▇-▇ Financial Statements; and (h) no part of Penton's
general corporate overhead (e.g., the compensation of Penton executives other
than ▇▇▇▇▇▇▇ and ▇▇▇▇▇▇, including without limitation the compensation of such
executives for serving on Surviving Corporation's board of directors or as its
officers), as opposed to Penton's costs specifically related to services
performed directly for the Surviving Corporation, will be charged to the
Surviving Corporation.
                  "TAX" or "TAXES" means (i) any income, gross receipts,
license, payroll, employment, excise, severance, stamp, occupation, premium,
windfall profits, environmental (including taxes under Code Section 59A),
customs duties, capital stock, franchise, profits, withholding, social security
(or similar), unemployment, disability, real property, personal property, sales,
use, transfer, registration, value added, alternative or add-on minimum,
estimated, or other tax, assessment or governmental charge of any kind
whatsoever imposed by any Governmental Authority, including any interest,
penalty, or addition thereto, whether disputed or not, (ii) liability for the
payment of any amounts of the type described in (i) above arising as a result of
being (or having been) a member of any Affiliated Group or being (or having
been) included or required to be included in any Tax Return related thereto; and
(iii) liability for the payment of any amounts of the type described in (i)
above as a result of any express or implied obligation to indemnify or otherwise
assume or succeed to the liability of any other Person.
                  "TAX RETURN" means any return, declaration, report, claim for
refund, information return or other document (including any related or
supporting schedule, statement or information) filed or required to be filed in
connection with the determination, assessment or collection of Taxes or the
administration of any laws, regulations or administrative requirements relating
to any Taxes.
                  "UNCLAIMED PITTWAY SHARES" has the meaning set forth in
Section 7.10.
                  "UNDISCLOSED ▇-▇ MATTER" means any fact or circumstance
existing as of the date of this Agreement regarding the business, assets,
properties, condition (financial or otherwise), results of operations or
prospects of ▇-▇ which has not been disclosed in this Agreement, the attachments
and exhibits hereto, the ▇-▇ Shareholders Disclosure Letter (without giving
effect to any updating disclosures made by the ▇-▇ Shareholders pursuant to
Section 7.9) or the other written information heretofore furnished to Penton and
Pittway in connection with the transactions contemplated hereby.
                  "UNDISCLOSED PENTON MATTER" means any fact or circumstance
existing as of the date of this Agreement regarding the business, assets,
properties, condition (financial or otherwise), results of operations or
prospects of Penton and its Subsidiaries which has not been disclosed in this
Agreement, the attachments and exhibits hereto, the Penton Disclosure Letter or
the Pittway Disclosure Letter (in the 
                                      -11-
   18
case of each such disclosure letter, without giving effect to any updating
disclosures made by Penton or Pittway pursuant to Section 7.9) or the other
written information heretofore furnished to the ▇-▇ Shareholders in connection
with the transactions contemplated hereby.
                  "UNPAID ADJUSTED ▇-▇ LIABILITIES" means, at any time, the then
unpaid balance of the Adjusted ▇-▇ Liabilities.
                                    ARTICLE 2
                                 THE COMBINATION
                  2.1 THE MERGER. On and subject to the terms and conditions of
this Agreement and in accordance with the Illinois Corporation Law, ▇-▇ shall
merge with and into the Combination Subsidiary (the "MERGER") at the Effective
Time. Following the Merger, the separate corporate existence of ▇-▇ shall cease
and the Combination Subsidiary shall be the surviving corporation (the
"SURVIVING CORPORATION") and shall succeed to and assume all of the rights and
obligations of ▇-▇ in accordance with the Illinois Corporation Law.
                  2.2 THE CLOSING. The closing of the Merger (the "CLOSING")
shall take place at the offices of ▇▇▇▇▇▇▇▇ & ▇▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇,
▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇, at 9:00 a.m. local time on the second business day
following the satisfaction or waiver of all conditions to the obligations of the
Parties to consummate the transactions contemplated hereby (other than
conditions with respect to actions the respective Parties are to take at the
Closing itself), or such other date as the Parties may mutually determine (the
"CLOSING DATE").
                  2.3 ACTIONS AT THE CLOSING; EFFECTIVE TIME. Subject to the
satisfaction or waiver of the conditions set forth in Article 8, at the Closing
▇-▇ and the Combination Subsidiary shall cause the filing with the Secretary of
State of Illinois pursuant to Section 1.10 of the Illinois Corporation Law of
executed articles of merger with regard to the Merger meeting the requirements
of Section 11.25 of the Illinois Corporation Law (the "ARTICLES OF MERGER"). The
Merger shall become effective upon the issuance by the Illinois Secretary of
State of a certificate of merger with respect to the Merger (the "EFFECTIVE
TIME"). The Surviving Corporation may, at any time after the Effective Time,
take any action (including executing and delivering any document) in the name
and on behalf of either ▇-▇ or the Combination Subsidiary in order to carry out
and effectuate the transactions contemplated by this Agreement.
                  2.4 EFFECT OF MERGER.
                             (a) GENERAL. The Merger shall have the effect set
         forth in Section 11.50 of the Illinois Corporation Law.
                                      -12-
   19
                             (b) ARTICLES OF INCORPORATION. At the Effective
         Time, the Articles of Incorporation of Combination Subsidiary in effect
         immediately prior to the Effective Time (attached as EXHIBIT A hereto)
         shall become the Articles of Incorporation of the Surviving
         Corporation, without any modification or amendment, except that the
         name of the Surviving Corporation set forth therein shall be changed to
         ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ Publishing Company.
                             (c) BYLAWS. At the Effective Time, the Bylaws of
         Combination Subsidiary in effect immediately prior to the Effective
         Time (attached as EXHIBIT B hereto) shall become the Bylaws of the
         Surviving Corporation, without any modification or amendment, except
         that the name of the Surviving Corporation set forth therein shall be
         changed to ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ Publishing Company.
                             (d) DIRECTORS AND OFFICERS. At the Effective Time,
         the directors of the Surviving Corporation shall consist of the
         following five members: ▇▇▇▇▇▇▇, ▇▇▇▇▇▇ and three other members who
         shall have been designated by Penton (one of which members designated
         by Penton shall serve as chairman of the board of directors); and the
         officers of the Surviving Corporation shall be ▇▇▇▇▇▇▇ as President,
         ▇▇▇▇▇▇ as Executive Vice President and Preston Vice as Secretary;
         provided that in the event that prior to the Effective Time ▇▇▇▇▇▇▇ or
         ▇▇▇▇▇▇ becomes unable or unwilling to so serve, he shall be replaced by
         another individual designated by the ▇-▇ Shareholders and reasonably
         agreeable to Penton and in the event that prior to the Effective Time
         Preston Vice becomes unable or unwilling to serve, he shall be replaced
         by another individual designated by Penton and reasonably agreeable to
         the ▇-▇ Shareholders.
                             (e) CONVERSION OF ▇-▇ SHARES. At and as of the
         Effective Time:
                                     (i) TREASURY SHARES. Shares of ▇-▇ Common
                  Stock held in the treasury of ▇-▇ immediately prior to the
                  Effective Time shall be canceled and extinguished without any
                  conversion thereof and no payment shall be made with respect
                  thereto.
                                     (ii) OUTSTANDING SHARES. The shares of ▇-▇
                  Common Stock outstanding immediately prior to the Effective
                  Time held by each ▇-▇ Shareholder shall be converted
                  automatically and without any action on the part of such ▇-▇
                  Shareholder into the following rights, subject to the
                  subsequent provisions of this Section 2.4, and shall have no
                  other rights:
                                              (A) the right to receive from
                             Penton shares of Penton Common equal in number to
                             six and seven hundred sixty-seven thousandths
                             percent (6.767%) of the Outstanding Effective Time
                             Shares multiplied by such ▇-▇ Shareholder's ▇-▇ 
                                      -13-
   20
                             Ownership Fraction, rounded to the next lower      
                             whole number of shares;        
                                              (B) the right to receive from
                             Penton cash equal in amount to $7.0 million
                             multiplied by such ▇-▇ Shareholder's ▇-▇ Ownership
                             Fraction;
                                              (C) the contingent right to
                             receive from Penton additional cash equal in amount
                             to any Contingent Cash Payment that becomes payable
                             pursuant to Section 2.4(g) multiplied by such ▇-▇
                             Shareholder's ▇-▇ Ownership Fraction; and
                                              (D) the contingent right to
                             receive from Penton additional cash and/or Penton
                             Common set forth in Section 2.4(h).
After the Effective Time, upon each ▇-▇ Shareholder's surrender to Penton of the
certificates representing his shares of ▇-▇ Common Stock outstanding immediately
prior to the Effective Time, duly endorsed for surrender, such ▇-▇ Shareholder
shall be issued the shares, and paid the cash (without interest), provided for
in (ii)(A) and (B) above and shall become entitled to the contingent rights
provided for in (ii)(C) and (D) above.
No ▇-▇ Common Stock shall be deemed to be outstanding, or to have any rights
other than those set forth above in this Section 2.4(e), after the Effective
Time. Without limiting the generality of the foregoing, each of the ▇-▇
Shareholders waives his right pursuant to Section 11.65 of the Illinois
Corporation Law to dissent from the Merger and obtain payment for the shares of
▇-▇ Common Stock outstanding immediately prior to the Effective Time held by
him.
                             (f) CONVERSION OF CAPITAL STOCK OF COMBINATION
         SUBSIDIARY. At the Effective Time, each share of Common Stock, par
         value $0.01 per share, of the Combination Subsidiary shall be converted
         automatically and without any action on the part of the holder thereof
         into one share of Common Stock, par value $0.01 per share, of the
         Surviving Corporation.
                             (g) CONTINGENT CASH PAYMENT(S).
                                     (i) AMOUNT. In the event the Surviving
                  Corporation's Pre-Tax Profits for 1998 exceed $4.0 million,
                  the ▇-▇ Shareholders, in the aggregate, shall be entitled to
                  receive from Penton in cash an amount equal to four (4) times
                  the excess of such Pre-Tax Profits over $4.0 million (a
                  "CONTINGENT CASH PAYMENT"). In the event the Surviving
                  Corporation's Pre-Tax Profits for 1999 exceed $4.0 million,
                  the ▇-▇ Shareholders, in the aggregate, shall be entitled to
                  receive from Penton in cash an amount 
                                      -14-
   21
                  equal to (A) five (5) times the excess of such Pre-Tax Profits
                  over $4.0 million, LESS (B) the amount of any payment to which
                  the ▇-▇ Shareholders, in the aggregate, became entitled
                  pursuant to the preceding sentence (also a "CONTINGENT CASH
                  PAYMENT"). Notwithstanding the foregoing, (A) neither the
                  amount of any Contingent Cash Payment nor the total amount of
                  Contingent Cash Payments shall exceed $4.0 million; and (B) in
                  the event of the termination, effective as of a date prior to
                  December 31, 1999, of either ▇-▇ Shareholder's employment as
                  described in Paragraph 4(a)(iv) or (v) of his Employment
                  Agreement, or in the event of Penton's liquidation (i.e., the
                  sale of all or substantially all of Penton's assets and the
                  distribution of Penton's net assets to its stockholders)
                  effective as of a date prior to December 31, 1999, (I) if such
                  effective date precedes December 31, 1998, the Contingent Cash
                  Payment on account of the Surviving Corporation's Pre-Tax
                  Profits for each of 1998 and 1999 shall be $2.0 million and
                  (II) if such effective date is on or subsequent to December
                  31, 1998, the Contingent Cash Payment on account of the
                  Surviving Corporation's Pre-Tax Profits for 1999 shall be the
                  excess of $4.0 million over the amount of the Contingent Cash
                  Payment, if any, on account of the Surviving Corporation's
                  Pre-Tax Profits for 1998.
                                     (ii) PAYMENT. The Contingent Cash Payment,
                  if any, on account of the Surviving Corporation's Pre-Tax
                  Profits for a particular calendar year shall be paid promptly
                  after (and in any event within 15 days after) the final
                  determination of such Pre-Tax Profits for such calendar year;
                  provided that any Contingent Cash Payment the amount of which
                  is determined pursuant to clause (B) of the final sentence of
                  (i) above on account of the liquidation of Penton shall be
                  paid at the time of such liquidation.
                                     (iii) DETERMINATION OF SURVIVING
                  CORPORATION'S PRE-TAX PROFITS. Within ninety (90) days after
                  the end of each of calendar year 1998 and calendar year 1999,
                  Penton will deliver to the ▇-▇ Shareholders Penton's
                  calculation of Surviving Corporation's Pre-Tax Profits for
                  such calendar year (the "DRAFT CALCULATION"). Penton will (i)
                  make available to the ▇-▇ Shareholders and their agents,
                  attorneys and accountants upon reasonable advance notice all
                  records reasonably relating to the Draft Calculation and (ii)
                  allow the ▇-▇ Shareholders and their agents, attorneys and
                  accountants upon reasonable advance notice to interview any
                  Penton personnel significantly involved in the preparation of
                  the Draft Calculation regarding the Draft Calculation. If the
                  ▇-▇ Shareholders disagree with the computation of Surviving
                  Corporation's Pre-Tax Earnings for the calendar year reflected
                  on the Draft Calculation, the ▇-▇ Shareholders may, within 30
                  days after receipt of the Draft Calculation, deliver a notice
                  (an "OBJECTION NOTICE") to Penton setting forth 
                                      -15-
   22
                  the ▇-▇ Shareholders' objections and, to the extent reasonably
                  possible, Surviving Corporation's Pre-Tax Profits for such
                  calendar year as determined by the ▇-▇ Shareholders. Penton
                  and the ▇-▇ Shareholders will use reasonable efforts to
                  resolve any disagreements as to the computation of Surviving
                  Corporation's Pre-Tax Profits for such calendar year, but if
                  they do not obtain a final resolution within 30 days after
                  Penton has received the Objection Notice, Penton and the ▇-▇
                  Shareholders will jointly retain an independent accounting
                  firm of recognized national standing that is not a public
                  accountant of Penton or any of its Affiliates (an "INDEPENDENT
                  FIRM") to resolve any remaining disagreements. If Penton and
                  the ▇-▇ Shareholders are unable to agree on the choice of an
                  Independent Firm, the choice will be selected by lot from
                  those "big-six" accounting firms that are Independent Firms
                  or, if no "big-six" accounting firm is an Independent Firm or
                  is willing to serve, selected by lot from four Independent
                  Firms that are willing to serve, two of which shall be
                  designated by Penton and two of which shall be designated by
                  the ▇-▇ Shareholders. Penton and the ▇-▇ Shareholders will
                  direct the chosen Independent Firm to render a determination
                  within 20 days of its retention and Penton and the ▇-▇
                  Shareholders and their respective agents will cooperate with
                  the chosen Independent Firm during its engagement. The chosen
                  Independent Firm will consider only those issues related to
                  the Draft Calculation set forth in the Objection Notice which
                  Penton and the ▇-▇ Shareholders have been unable to resolve.
                  The determination of the chosen Independent Firm will be based
                  on and consistent with the definition of Surviving
                  Corporation's Pre-Tax Profits included herein. The
                  determination of the chosen Independent Firm will be
                  conclusive and binding upon Penton and the ▇-▇ Shareholders.
                  In any proceeding described above in this paragraph (iii), all
                  of the reasonable costs and expenses of Penton (including
                  reasonable attorneys' fees), all of the reasonable costs and
                  expenses of the ▇-▇ Shareholders (including reasonable
                  attorneys' fees) and all costs and expenses of the chosen
                  Independent Firm shall be borne by Penton in the event the
                  Draft Calculation is lower than the amount of Surviving
                  Corporation's Pre-Tax Profits for such calendar year as
                  determined by the chosen Independent Firm; otherwise the ▇-▇
                  Shareholders shall bear all such costs and expenses. It is
                  expressly understood and agreed that monthly operating
                  statements of the Surviving Corporation will not under any
                  circumstances be binding on either Penton or the ▇-▇
                  Shareholders for purposes of calculating Surviving
                  Corporation's Pre-Tax Profits.
                                     (iv)     CONTROL OF SURVIVING CORPORATION.
                                     (A) Until the close of its business on
                  December 31, 1999, the Surviving Corporation will be kept in
                  existence as a wholly-
                                      -16-
   23
                  owned subsidiary of Penton, and none of its assets (other than
                  cash) will be transferred to Penton or any of Penton's
                  Affiliates.
                                     (B) Unless an event described in clause (B)
                  of the final sentence of Section 2.4(g) (i) above has
                  occurred, the taking of any of the following actions during
                  1998 or 1999 shall require the prior written consent of each
                  ▇-▇ Shareholder who at the time continues to be employed by
                  the Surviving Corporation:
                                              (I) Surviving Corporation's
                             incurrence of debt for purposes other than for
                             working capital requirements in excess of working
                             capital of ▇-▇ at the Effective Time and thereafter
                             generated by the Surviving Corporation;
                                              (II) Surviving Corporation's
                             hiring of any employee (other than to fill a
                             vacancy at the prevailing compensation level) or
                             consultant, or termination (other than for cause)
                             of the employment of any of the persons who are
                             employees of ▇-▇ immediately prior to the Effective
                             Time;
                                              (III) Surviving Corporation's
                             change in the salary or bonus of any of its
                             employees;
                                              (IV) Surviving Corporation's
                             institution or termination of, or increase or
                             decrease in benefits under, any employee benefit
                             plan or program (it being understood and agreed
                             that Penton's institution or termination of, or
                             increase or decrease in benefits under, any
                             employee benefit plan or program provided generally
                             to employees of Penton and Surviving Corporation
                             shall not constitute Surviving Corporation's
                             institution or termination of, or increase or
                             decrease in benefits under, any employee benefit
                             plan or program);
                                              (V) Surviving Corporation's
                             development or acquisition of a new Business
                             Information Product or discontinuation or
                             disposition of an existing Business Information
                             Product;
                                              (VI) Surviving Corporation's
                             making of any change to a Business Information
                             Product that is material to such Business
                             Information Product;
                                              (VII) Surviving Corporation's
                             incurrence of expenses outside the ordinary course
                             of ▇-▇'s business or inconsistent with ▇-▇'s past
                             practice;
                                      -17-
   24
                                              (VIII) Surviving Corporation's
                             discontinuation or reduction of its East Coast or
                             Midwest promotion accounts, each $35,000 per year,
                             or, provided such practices do not violate the
                             Foreign Corrupt Practices Act of 1977 or any other
                             applicable law and do not generate unreported
                             income to either ▇-▇ Shareholder, Surviving
                             Corporation's alteration of ▇-▇'s past practices
                             with respect to such promotion accounts; or
                                              (IX) Surviving Corporation's
                             engaging in any other material transaction;
                  provided that no such written consent (other than with respect
                  to a termination of employment (other than for cause) or a
                  termination of, or decreases in benefits under, any employee
                  benefit plan or program) shall be required if such action
                  would have no adverse effect on Surviving Corporation's
                  Pre-Tax Profits for any remaining calendar year (or portion
                  thereof) during 1998 and 1999 or if the adverse effect of such
                  action on Surviving Corporation's Pre-Tax Profits for each
                  then remaining calendar year (or portion thereof) during 1998
                  and 1999 can be reliably measured and Penton agrees to exclude
                  such effect from the calculation thereof.
                                     (C) Subject to (A) above, to any contrary
                  provision of either Employment Agreement and to obtaining any
                  consent required by (B) above, Penton, as the sole stockholder
                  of the Surviving Corporation, shall have the power and right
                  to control all aspects of the business and operations of the
                  Surviving Corporation.
                             (h) GUARANTEE OF VALUE.
                                     (i) In the event that either the Average
         Market Price during the First Reference Period or the Average Market
         Price during the Second Reference Period is less than the Guaranteed
         Average Market Price, Penton will, on the 15th day after the conclusion
         of the Second Reference Period (or, if such day is not a business day,
         on the first business day thereafter), pay to each ▇-▇ Shareholder cash
         in an amount equal to (x) the excess of the Guaranteed Average Market
         Price over the lower of such Average Market Prices (such excess being
         referred to as the "SPREAD"), multiplied by (y) the number of Merger
         Shares issued to such ▇-▇ Shareholder (whether or not held by him at
         the time of payment); provided that the payment made with respect to
         any Merger Share no longer held by such ▇-▇ Shareholder at the end of
         the preceding day that has been sold by such ▇-▇ Shareholder (or by any
         transferee that acquired such Merger Share from such ▇-▇ Shareholder in
         a transaction not involving a sale) for a gross price, before expenses
         of sale (including without limitation underwriters discounts or
         commissions, broker commissions and fees and disbursements of counsel),
         equal to or exceeding the 
                                      -18-
   25
         Guaranteed Average Market Price less the Spread shall be limited to the
         excess of the Guaranteed Average Market Price over such gross price
         (and thus, for example, no payment shall be made with respect to any
         such Merger Share so sold for a gross price equal to or exceeding the
         Guaranteed Average Market Price); and further provided that if and to
         the extent the total amount payable to any ▇-▇ Shareholder, or to the
         ▇-▇ Shareholders in the aggregate, would, in the reasonable judgment of
         the ▇-▇ Shareholders or Penton, cause the Merger not to constitute a
         "reorganization" within the meaning of Section 368(a) of the Code,
         then, at the election of the ▇-▇ Shareholders (provided such election
         is received by Penton at least five (5) business days prior to the due
         date for payment of such cash) or at the election of Penton (provided
         such election is given to the ▇-▇ Shareholders by Penton at least two
         (2) business days prior to the due date for payment of such cash),
         Penton will substitute for a portion of such cash shares of Penton
         Common (valued at the Average Market Price during the Second Reference
         Period) to the extent necessary to avoid such result (provided that no
         fractional share of Penton Common shall be issued to either ▇-▇
         Shareholder, but in lieu thereof Penton shall pay to such ▇-▇
         Shareholder an amount in cash equal to the product of such fractional
         share multiplied by the Average Market Price during the Second
         Reference Period).
                                     (ii) Each ▇-▇ Shareholder agrees to provide
         to Penton, by 10:00 a.m., Cleveland, Ohio time on the due date for any
         payment to him pursuant to (i) above, a written certification
         identifying each sale of a Merger Share by him (or by any transferee
         that acquired any Merger Share from him in a transaction not involving
         a sale) prior to such date and the gross price for which such Merger
         Share was sold, together with evidence supporting such certification
         reasonably satisfactory to Penton. To expedite Penton's review of such
         certification and evidence, each ▇-▇ Shareholder agrees to provide to
         Penton, within 5 days after the conclusion of the Second Reference
         Period, a written certification identifying each sale of a Merger Share
         by him (or by any transferee that acquired any Merger Share from him in
         a transaction not involving a sale) prior to the conclusion of the
         Second Reference Period and the gross price for which such Merger Share
         was sold, together with evidence supporting such certification
         reasonably satisfactory to Penton.
                                     (iii) Penton agrees that during the period
         beginning sixty days prior to the ▇▇▇▇▇▇ ▇▇▇▇ Earnings Release Date and
         ending at the conclusion of the Second Reference Period, it will not
         make any public disclosures except as required by law or consistent
         with its public disclosure practices subsequent to the Spinoff. Penton
         further agrees that during the period beginning twenty business days
         prior to the First Reference Period and ending at the conclusion of
         such Reference Period, and during the period beginning twenty business
         days prior to the Second Reference Period and ending at the conclusion
         of such Reference Period, neither it nor any of its Affiliates will
         purchase any security of the same type as any Merger Share. 
                                      -19-
   26
         Each ▇-▇ Shareholder agrees that during the period beginning twenty
         business days prior to the First Reference Period and ending at the
         conclusion of such Reference Period, and during the period beginning
         twenty business days prior to the Second Reference Period and ending at
         the conclusion of such Reference Period, neither he nor any of his
         Affiliates (excluding Penton notwithstanding the occurrence of the
         Effective Time) will sell any Merger Share (or other security of the
         same type as any Merger Share).
                                     (iv) Notwithstanding the foregoing
         provisions of this Section 2.4(h), in the event any significant portion
         of the Average Market Price during the First Reference Period or during
         the Second Reference Period is to be determined pursuant to clause
         (iii) of the definition of "Average Market Price," then, in lieu of any
         payment of cash and/or shares of Penton Common pursuant to clause (i)
         above, Penton shall, on the 15th day after the conclusion of the Second
         Reference Period (or, if such day is not a business day, on the first
         business day thereafter), purchase from each ▇-▇ Shareholder the Merger
         Shares held by him at the conclusion of the Second Reference Period by
         paying to such ▇-▇ Shareholder, against surrender by him, free and
         clear of any Security Interest, of the certificate(s) evidencing such
         shares of Penton Common duly endorsed for surrender, an amount equal to
         the Guaranteed Average Market Price multiplied by the number of such
         shares.
                                     (v) In the event that subsequent to the
         Effective Time and prior to the conclusion of the Second Reference
         Period any other security (including without limitation any other share
         of Penton Common) is issued as a dividend or distribution on, or in a
         split of, or in exchange for or in lieu of, any Merger Share: (x) such
         Merger Share shall be treated for all purposes of this Section as
         including such other security; and (y) the Average Market Price shall
         include not only the Average Market Price of Penton Common as defined
         in Article 1 but also an amount equal to the Average Market Price of
         such other security determined in a manner corresponding to that used
         in determining the Average Market Price of Penton Common.
                                     (vi) Penton, Combination Subsidiary, ▇-▇
         and the ▇-▇ Shareholders acknowledge that any contingent rights to
         payments of cash, and any payments other than payments of cash,
         pursuant to the preceding provisions of this Section 2.4(h) do not
         constitute "boot" for federal income tax purposes. Except insofar as a
         portion of any such payment constitutes interest for such purposes, and
         except as otherwise required on account of any change in law or the
         interpretation thereof subsequent to the execution and delivery of this
         Agreement, Penton and the Surviving Corporation agree not to provide
         the ▇-▇ Shareholders with a Form 1099 relating to such contingent
         rights or payments.
                                      -20-
   27
                             (i) CLOSING OF TRANSFER RECORDS. After the
         Effective Time, transfers of shares of ▇-▇ Common Stock shall not be
         made on the stock transfer books of the Surviving Corporation.
                             (j) DELIVERY OF MERGER CONSIDERATION TO PUBLIC
         OFFICIAL. None of Penton, the Combination Subsidiary, ▇-▇, the
         Surviving Corporation or any other Person shall be liable to any former
         holder of shares of ▇-▇ Common Stock for any amount properly delivered
         to a public official pursuant to applicable abandoned property, escheat
         or similar laws.
                             (k) LOST, STOLEN OR DESTROYED CERTIFICATES. In the
         event any certificate representing shares of ▇-▇ Common Stock shall
         have been lost, stolen or destroyed, upon the making of an affidavit of
         that fact by the Person claiming such certificate to be lost, stolen or
         destroyed and, if required by the Surviving Corporation, the posting by
         such Person of a bond in such reasonable amount as the Surviving
         Corporation may direct as indemnity against any claim that may be made
         against it with respect to such certificate, the Surviving Corporation
         will issue in exchange for such lost, stolen or destroyed certificate a
         new certificate that may be surrendered pursuant to this Section 2.4.
                             (l) TRANSFERABILITY RESTRICTION. The right of a ▇-▇
         Shareholder to receive any Contingent Cash Payment or to receive cash
         and/or shares of Penton Common pursuant to Section 2.4(h) may not be
         sold, assigned, pledged, gifted, conveyed, transferred or otherwise
         disposed of (a "TRANSFER") by such ▇-▇ Shareholder, except by will or
         the laws of descent and distribution (and in the case of any such
         permitted Transfer, such right shall be subject to the continued
         application of this Section to any Transfer by the transferee). Any
         Transfer in violation of this Section 2.4(l) shall be null and void.
                             (m) PLAN OF MERGER. This Article 2 (and the
         provisions of this Agreement defining terms used herein) shall
         constitute the plan of merger with respect to the Merger for purposes
         of Section 11.05 of the Illinois Corporation Law.
                                    ARTICLE 3
                    REPRESENTATIONS AND WARRANTIES OF PENTON
                  Penton hereby represents and warrants to the ▇-▇ Shareholders
as follows:
                  3.1 PENTON AND COMBINATION SUBSIDIARY ORGANIZATION AND
QUALIFICATION. Penton is a corporation duly organized, validly existing and in
good standing under the laws of the State of Delaware, and has the requisite
corporate and 
                                      -21-
   28
other power and authority (including all licenses, permits and authorizations)
to own and operate its properties and to carry on its business as now conducted.
Penton is qualified to do business in the State of Ohio and in every other
jurisdiction in which the nature of its business or its ownership of property
requires it to be so qualified, except where the failure to be so qualified
would not have a Material Adverse Effect on Penton. Combination Subsidiary is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Illinois, and has the requisite corporate and other power and
authority (including all licenses, permits and authorizations) to own and
operate its properties and to carry on its business as now conducted.
Combination Subsidiary is qualified to do business in every jurisdiction in
which the nature of its business or its ownership of property requires it to be
so qualified, except where the failure to be so qualified would not have a
Material Adverse Effect on Combination Subsidiary.
                  3.2 PENTON AND COMBINATION SUBSIDIARY AUTHORITY RELATIVE TO
THIS AGREEMENT.
                             (a) Each of Penton and Combination Subsidiary has
         the requisite corporate power to enter into this Agreement and to carry
         out its obligations hereunder. The execution and delivery of this
         Agreement by Penton and the consummation by Penton of the transactions
         on its part contemplated by this Agreement have been duly authorized by
         the board of directors of Penton and by Pittway as the sole stockholder
         of Penton and no other corporate proceedings on the part of Penton are
         necessary to authorize this Agreement or such transactions, other than
         incidental implementing actions such as action to implement Section
         7.14 and action with respect to Penton employee benefit plans described
         in Section 7.8.
                             (b) The execution and delivery of this Agreement by
         Combination Subsidiary and the consummation by Combination Subsidiary
         of the transactions on its part contemplated by this Agreement have
         been duly authorized by the board of directors of Combination
         Subsidiary and by Penton as the sole stockholder of Combination
         Subsidiary and no other corporate proceedings on the part of
         Combination Subsidiary are necessary to authorize this Agreement or
         such transactions, other than incidental implementing actions such as
         action to implement Section 2.4(d).
                             (c) This Agreement has been duly executed and
         delivered by Penton and Combination Subsidiary and constitutes a valid
         and binding obligation of Penton and Combination Subsidiary,
         enforceable against them in accordance with its terms, subject to
         bankruptcy, insolvency, moratorium and other similar laws affecting
         creditors' rights generally and general principles of equity.
                                      -22-
   29
                             (d) Except as set forth under the caption
         "Authority" in a letter delivered to the ▇-▇ Shareholders by Penton
         simultaneously with the execution of this Agreement (the "PENTON
         DISCLOSURE LETTER"), neither Penton nor Combination Subsidiary nor any
         of Penton's other Subsidiaries is subject to, or obligated under, any
         provision of
                                     (i) its charter or bylaws,
                                     (ii) any agreement, arrangement or
                  understanding (whether written or oral),
                                     (iii) any license, franchise or permit or
                                     (iv) subject to compliance with the
                  statutes referred to in (e) below, any law, regulation, order,
                  judgment or decree,
         which would be breached or violated, or in respect of which a right of
         termination or acceleration or any Security Interest on any of Penton's
         stock or assets or on any of Combination Subsidiary's or any of
         Penton's other Subsidiaries' stock or assets would be created, by
         Penton's and Combination Subsidiary's execution, delivery and
         performance of this Agreement and the consummation of the transactions
         contemplated hereby other than any such breach, violation, right of
         termination or acceleration or Security Interest that would not have a
         Material Adverse Effect on Penton.
                             (e) Other than under the ▇▇▇▇-▇▇▇▇▇-▇▇▇▇▇▇ Act, the
         Securities Act, the Exchange Act, securities or "blue sky" laws and the
         regulations under the foregoing and as set forth under the caption
         "Authority" in the Penton Disclosure Letter, with the exception of
         obtaining the approval required to fulfill the condition set forth in
         Section 8.1(j) and the filing with the Secretary of State of the State
         of Delaware of one or more amendments to Penton's certificate of
         incorporation as required to fulfill the condition set forth in Section
         8.2(e) and the filing with the Secretary of State of the State of
         Illinois of the Articles of Merger, no Governmental Action is necessary
         on the part of Penton or Combination Subsidiary for the consummation of
         the transactions on its part contemplated by this Agreement except for
         any Government Action the failure to obtain or take which would not
         have a Material Adverse Effect on Penton.
                  3.3 PENTON CONSTITUENT INSTRUMENTS/CAPITALIZATION.
                             (a) The copies of the certificate of incorporation
         and bylaws of Penton furnished to the ▇-▇ Shareholders by Penton prior
         to the execution and delivery of this Agreement are correct and
         complete copies thereof as amended as of the time of such execution and
         delivery. As of the Effective Time, the 
                                      -23-
   30
         certificate of incorporation and bylaws of Penton will be as set forth
         on EXHIBIT C and EXHIBIT D hereto, respectively.
                             (b) As of the date of this Agreement, the
         authorized capital stock of Penton consists of 1,000 shares of common
         stock having a par value of $1.00 per share, 100 of which shares are
         issued and outstanding and owned by Pittway. As of the Effective Time,
         the authorized capital stock of Penton will be as set forth in EXHIBIT
         C hereto (and each share of capital stock of Penton currently
         outstanding will have become Penton Common). All of the issued and
         outstanding shares of capital stock of Penton are validly issued, fully
         paid and nonassessable. The holders of outstanding shares of capital
         stock of Penton are not entitled to any preemptive or other similar
         rights. Excluding this Agreement, the Penton 1998 Stock Awards Plan
         (under which no awards are outstanding) and the ▇▇▇▇▇▇ ▇▇▇▇ Director
         Stock Option Plan (under which no awards are outstanding), and except
         as set forth under the caption "Capitalization" in the Penton
         Disclosure Letter, there are no options, warrants, conversion
         privileges or other rights, agreements, arrangements or commitments
         obligating Penton to issue or sell any shares of capital stock of
         Penton or securities or obligations of any kind convertible into or
         exchangeable for any shares of capital stock of Penton or of any other
         Person, nor are there any stock appreciation, phantom or similar rights
         outstanding based upon the book value or any other attribute of Penton.
         When issued pursuant to this Agreement, the shares of Penton Common
         issued to the ▇-▇ Shareholders will be duly authorized, validly issued,
         fully paid and nonassessable.
                  3.4 SUBSIDIARIES. Penton owns, directly or indirectly, all of
the outstanding capital stock of each of its Subsidiaries (which, at the date of
this Agreement, consist solely of the Existing Penton Subsidiaries), free and
clear of all Security Interests; and there are no subscription rights, warrants,
options, conversion rights or agreements of any kind outstanding to purchase or
otherwise acquire any equity interests in any of such Subsidiaries or any
securities or obligations of any kind convertible into or exchangeable for any
such equity interests. Except as set forth under the caption "Joint Ventures" in
the Penton Disclosure Schedule, neither Penton nor any of its Subsidiaries owns,
directly or indirectly, any stock, partnership interest, joint venture interest,
or other security issued by any corporation, organization or entity other than
interests in Subsidiaries of Penton. Each of Penton's Subsidiaries is a
corporation duly organized, validly existing and in good standing under the laws
of its jurisdiction of formation, is qualified to do business in every
jurisdiction in which the nature of its business or its ownership of property
requires it to be so qualified, except where the failure to so qualify would not
have a Material Adverse Effect on Penton, and has the requisite power and
authority (including all authorizations, licenses and permits) to own and
operate its properties and to carry on its business as now conducted.
                                      -24-
   31
                  3.5 FINANCIAL STATEMENTS. The following unaudited consolidated
financial statements of Penton and its Subsidiaries (collectively the "PENTON
FINANCIAL STATEMENTS") have been delivered to the ▇-▇ Shareholders: balance
sheets and statements of operations, stockholders' equity and cash flows as of
and for the years ended December 31, 1996 and December 31, 1997. The Penton
Financial Statements have been prepared on the basis set forth in the notes
thereto and, subject to the disclosures made in the notes thereto, fairly
present in accordance with generally accepted accounting principles applied on a
consistent basis the financial condition and results of operations of Penton and
its Subsidiaries as of the dates and for the periods referred to therein.
                  3.6 ABSENCE OF UNDISCLOSED LIABILITIES. Neither Penton nor any
of its Subsidiaries has any Liabilities which are material to the financial
condition, assets, business or results of operations of Penton and its
Subsidiaries considered as a whole except for (a) Liabilities disclosed in the
Penton Financial Statements or in this Agreement, (b) Liabilities that have
arisen since December 31, 1997 in the Ordinary Course of Business of Penton and
its Subsidiaries (none of which is a Liability resulting from breach of
contract, fraud or other tort, infringement or lawsuit), and (c) Liabilities set
forth under the caption "Liabilities" in the Penton Disclosure Letter.
                  3.7 NO MATERIAL ADVERSE CHANGE. Since December 31, 1997, there
has not been, occurred or arisen any event which has had or is reasonably likely
to have a Material Adverse Effect on Penton.
                  3.8 LITIGATION. Except as set forth under the caption
"Litigation" in the Penton Disclosure Letter, there are no actions, suits,
proceedings, orders or investigations pending or, to the Knowledge of Penton,
threatened against or relating to Penton or any of its Subsidiaries at law or in
equity, or before or by any Governmental Authority. Except as set forth under
such caption, neither Penton nor any of its Subsidiaries nor, to the Knowledge
of Penton, Pittway has ever received any written opinion or legal advice to the
effect that Penton is exposed from a legal standpoint to any Liability which is
reasonably likely to have a Material Adverse Effect on Penton.
                  3.9 BROKERAGE. There are no claims for brokerage commissions,
finders' fees or similar compensation in connection with the transactions
contemplated by this Agreement based on any arrangement or agreement made by or
on behalf of Penton or any of its Subsidiaries.
                  3.10 EMPLOYEES; RETIREE WELFARE BENEFIT LIABILITIES. No key
executive employee of Penton or any of its Subsidiaries has given notice of
termination of his employment other than at normal retirement. Penton and its
Subsidiaries have complied in all material respects with, or have cured all
material non-compliances with, all laws relating to the employment of labor,
including provisions thereof relating to wages, hours, equal opportunity,
collective bargaining and the payment of social security and other Taxes. Except
for Penton Retiree Life Insurance, neither Penton nor 
                                      -25-
   32
any of its Subsidiaries nor Pittway maintains any Employee Welfare Benefit Plan
which provides benefits to current or future retirees from Penton or any of its
Subsidiaries (or their spouses or dependents) of the type subject to Financial
Accounting Standards Board Statement No. 106 reporting requirements.
                  3.11 COMPLIANCE WITH LAWS; PERMITS; CERTAIN OPERATIONS. Penton
and its Subsidiaries and their respective officers, agents and employees have
complied in all material respects with, or have cured all material
non-compliances with, all applicable laws and regulations of United States
(federal, state and local) and non-United States governments and all agencies
thereof which affect the businesses or any owned or leased properties of Penton
or any of its Subsidiaries and to which Penton or any of its Subsidiaries may be
subject, and except as set forth under the caption "Compliance with Laws" in the
Penton Disclosure Letter, no claims have been filed against Penton or any of its
Subsidiaries alleging a violation of any such law or regulation, except for any
failures to so comply that would not, individually or in the aggregate, have a
Material Adverse Effect on Penton and except for any such claims that would not,
individually or in the aggregate, have a Material Adverse Effect on Penton.
                  3.12 AFFILIATE TRANSACTIONS. Except as set forth under the
caption "Affiliate Transactions" in the Penton Disclosure Letter, to the
Knowledge of Penton, no officer or director of Penton or any of its
Subsidiaries, no member of the immediate family of any such officer or director,
and no entity in which any of such persons owns any beneficial interest (other
than a publicly held corporation whose stock is traded on a national securities
exchange or in the over-the-counter market and less than 5% of the stock of
which is beneficially owned by any of such persons) (collectively "PENTON
INSIDERS"), has any agreement of any kind with Penton or any of its Subsidiaries
or any interest in any property, real, personal or mixed, tangible or
intangible, used in or pertaining to the business of Penton or any of its
Subsidiaries. For purposes of the preceding sentence, the members of the
immediate family of an officer or director shall consist of the spouse, parents,
children (natural and adopted), siblings, mothers-and fathers-in-law, sons-and
daughters-in-law, and brothers-and sisters-in-law of such officer or director.
                  3.13 TAX STATUS OF SPINOFF; TAX MATTERS RELATED TO THE MERGER.
Other than as set forth under the caption "Taxes" in the Penton Disclosure
Letter, no Tax is or will be payable by Penton or any of its Subsidiaries as a
result of the Spinoff. Prior to the Merger, Penton and its Subsidiaries have not
acquired any ▇-▇ Common Stock. Penton does not have any plan or intention: (a)
to cause Combination Subsidiary or Surviving Corporation to issue additional
shares of its stock, or take any other action, that would result in Penton
losing Control of it, (b) except as may be required by Section 2.4(h)(iv), to
reacquire any of the Penton Common issued pursuant to this Agreement, or (c) to
cause the Surviving Corporation to sell, distribute or otherwise dispose of any
of ▇-▇'s assets acquired in the Merger, except for dispositions made in the
ordinary course of business or transfers of assets to a corporation controlled
by the 
                                      -26-
   33
Surviving Corporation as described in Section 368(a)(2)(C) of the Code.
Combination Subsidiary has no plan or intention: (a) to issue additional shares
of its stock, or take any other action, that would result in Penton losing
Control of it or of the Surviving Corporation, or (b) to sell, distribute or
otherwise dispose of any of ▇-▇'s assets acquired in the Merger, except for
dispositions made in the ordinary course of business or transfers of assets to a
corporation controlled by the Surviving Corporation as described in Section
368(a)(2)(C) of the Code.
                                    ARTICLE 4
             REPRESENTATIONS AND WARRANTIES OF THE ▇-▇ SHAREHOLDERS
                  The ▇-▇ Shareholders jointly and severally hereby represent
and warrant to Penton that:
                  4.1 ▇-▇ ORGANIZATION AND QUALIFICATION. ▇-▇ is a corporation
duly organized, validly existing and in good standing under the laws of the
State of Illinois, and has the requisite corporate and other power and authority
(including all licenses, permits and authorizations) to own and operate its
properties and to carry on its business as now conducted. ▇-▇ is qualified to do
business in every jurisdiction in which the nature of its business or its
ownership of property requires it to be so qualified, except where the failure
to be so qualified would not have a Material Adverse Effect on ▇-▇.
                  4.2 AUTHORITY RELATIVE TO THIS AGREEMENT.
                             (a) Each of the ▇-▇ Shareholders has the requisite
         power to enter into this Agreement and to carry out his obligations
         hereunder.
                             (b) ▇-▇ has the requisite corporate power to enter
         into this Agreement and to carry out its obligations hereunder. The
         execution and delivery of this Agreement by ▇-▇ and the consummation by
         ▇-▇ of the transactions on its part contemplated by this Agreement have
         been duly authorized by the board of directors of ▇-▇ and by the ▇-▇
         Shareholders as the sole stockholders of ▇-▇ and no other corporate
         proceedings on the part of ▇-▇ are necessary to authorize this
         Agreement or such transactions, other than incidental implementing
         actions such as action pursuant to Section 7.8(i).
                             (c) This Agreement has been duly executed and
         delivered by each of the ▇-▇ Shareholders and by ▇-▇ and constitutes a
         valid and binding obligation of each of them, enforceable in accordance
         with its terms, subject to bankruptcy, insolvency, moratorium and other
         similar laws affecting creditors' rights generally and general
         principles of equity.
                                      -27-
   34
                             (d) Except as set forth under the caption
         "Authority" in a letter delivered to Penton by the ▇-▇ Shareholders
         simultaneously with the execution of this Agreement (the "▇-▇
         SHAREHOLDERS DISCLOSURE LETTER"), neither of the ▇-▇ Shareholders nor
         ▇-▇ is subject to, or obligated under, any provision of
                                     (i) its charter or bylaws (in the case of
                  ▇-▇),
                                     (ii) any agreement, arrangement or
                  understanding (whether written or oral),
                                     (iii) any license, franchise or permit (in
                  the case of ▇-▇), or
                                     (iv) subject to compliance with the
                  statutes referred to in (e) below, any law, regulation, order,
                  judgment or decree,
         which would be breached or violated, or in respect of which a right of
         termination or acceleration or any Security Interest on any of ▇-▇'s
         stock or assets would be created, by the ▇-▇ Shareholders' and ▇-▇'s
         execution, delivery and performance of this Agreement and the
         consummation of the transactions contemplated hereby other than any
         such breach, violation, right of termination or acceleration or
         Security Interest that would not have a Material Adverse Effect on ▇-▇.
                             (e) Other than under the ▇▇▇▇-▇▇▇▇▇-▇▇▇▇▇▇ Act or
         as set forth under the caption "Authority" in the ▇-▇ Shareholders
         Disclosure Letter, with the exception of the filing with the Secretary
         of State of the State of Illinois of the Articles of Merger, no
         Governmental Action is necessary on the part of either ▇-▇ Shareholder
         or ▇-▇ for the consummation of the transactions on his or its part
         contemplated by this Agreement except for any Governmental Action the
         failure to obtain or take which would not have a Material Adverse
         Effect on ▇-▇.
                  4.3 INVESTMENT. Each ▇-▇ Shareholder (i) will be acquiring the
shares of Penton Common issued to him pursuant to this Agreement solely for his
own account for investment purposes and not with a view to any distribution
thereof which would violate the Securities Act; (ii) is a sophisticated investor
with knowledge and experience in business and financial matters; (iii) has not
been offered such Penton Common by any form of general advertising or general
solicitation; (iv) has been given access to such information regarding Penton
and its Subsidiaries as he has requested and has been given an opportunity to
ask questions and has received answers regarding such information; (v) is able
to bear the economic risk inherent in holding such Penton Common and (vi) is an
Accredited Investor by virtue of having (A) a net worth individually or jointly
with his spouse of at least $1,000,000 (without giving effect to any increase in
such net worth as a result of the transactions contemplated hereby), (B) income
individually in excess of $200,000 for each of 1996 and 1997 and an 
                                      -28-
   35
expectation of income in excess of such amount in 1998, or (C) income with his
spouse in excess of $300,000 for each of 1996 and 1997 and an expectation of
income with his spouse in excess of such amount in 1998.
                  4.4 ▇-▇ CONSTITUENT INSTRUMENTS/CAPITALIZATION.
                             (a) The copies of the articles of incorporation and
         bylaws of ▇-▇ furnished to Penton by the ▇-▇ Shareholders prior to the
         execution and delivery of this Agreement are correct and complete
         copies thereof as amended as of the time of such execution and
         delivery. There have been no subsequent amendments thereto.
                             (b) The authorized capital stock of ▇-▇ consists of
         700 shares of ▇-▇ Common Stock, 300 shares of Common Stock-Series B,
         without par value, and 200 shares of Preferred Stock, without par
         value, of which 700 shares of ▇-▇ Common Stock are issued and
         outstanding. Such shares of ▇-▇ Common Stock are owned by the ▇-▇
         Shareholders as follows: ▇▇▇▇▇▇▇--350 shares; and ▇▇▇▇▇▇--350 shares.
         All of the issued and outstanding shares of ▇-▇ Common Stock are
         validly issued, fully paid and nonassessable. The holders of
         outstanding shares of ▇-▇ Common Stock are not entitled to any
         preemptive or other similar rights. Excluding this Agreement, there are
         no options, warrants, conversion privileges or other rights,
         agreements, arrangements or commitments obligating ▇-▇ to issue or sell
         any shares of capital stock of ▇-▇ or securities or obligations of any
         kind convertible into or exchangeable for any shares of capital stock
         of ▇-▇ or of any other Person, nor are there any stock appreciation,
         phantom or similar rights outstanding based upon the book value or any
         other attribute of ▇-▇.
                  4.5 SUBSIDIARIES. ▇-▇ has no Subsidiary and owns no stock,
partnership interest, joint venture interest, or any other security issued by
any corporation, organization or entity.
                  4.6 TITLE TO ASSETS. ▇-▇ has good title to the Business
Information Products and other assets (including without limitation all tangible
and intangible assets, Intellectual Property, licenses and goodwill related to
such Business Information Products, mailing lists, lists of advertisers,
circulation lists and other lists, printed material, work in process, prepaid
expenses, receivables, furniture and equipment) used in its business that it
purports to own (and such title is free and clear of all Security Interests
except as set forth in the final paragraph of Section 6.2 and under the caption
"Security Interests" in the ▇-▇ Shareholders Disclosure Letter); and a valid
leasehold or license interest in the Business Information Products and other
assets used in its business that it purports to lease as lessee or license as
licensee. All such leases and licenses are legal, valid and binding and in full
force and effect, without default. Prior to the execution and delivery of this
Agreement, the ▇-▇ Shareholders have furnished to Penton a correct and complete
copy of each such 
                                      -29-
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lease and license to which a ▇-▇ Insider (as defined in Section 4.15) is a
party, as amended as of the time of such execution and delivery, identified as
being such a lease or license.
                  4.7 SUFFICIENCY OF ASSETS. Except as set forth under the
caption "Sufficency of Assets" in the ▇-▇ Shareholders Disclosure Letter, the
assets of ▇-▇ include all of the assets, other than the accounts receivable and
any cash to be distributed to the ▇-▇ Shareholders pursuant to the final
paragraph of Section 6.2, necessary to conduct the business of ▇-▇ as now
conducted and in the manner reflected in the ▇-▇ Financial Statements. The
accounts receivable so distributed to the ▇-▇ Shareholders (which the Surviving
Corporation will have certain obligations to attempt to collect on behalf of the
▇-▇ Shareholders pursuant to Section 7.16) will be valid and enforceable,
subject to no counterclaim or right of setoff, and the Surviving Corporation's
efforts to collect such accounts receivable, provided they are consistent with
▇-▇'s past practices with respect to efforts to collect its trade accounts
receivable, will not subject the Surviving Corporation to any Liability.
                  4.8 FINANCIAL STATEMENTS. The following unaudited financial
statements of ▇-▇ (collectively the "▇-▇ FINANCIAL STATEMENTS") have been
delivered to Penton: balance sheets and statements of operations, stockholders'
equity and cash flows as of and for the years ended December 31, 1996 and
December 31, 1997. The ▇-▇ Financial Statements have been prepared on the basis
set forth in the notes thereto and, subject to the disclosures made in the notes
thereto, fairly present in accordance with generally accepted accounting
principles applied on a consistent basis the financial condition and results of
operations of ▇-▇ as of the dates and for the periods referred to therein.
                  4.9 ABSENCE OF UNDISCLOSED LIABILITIES. ▇-▇ does not have any
Liabilities which are material to the financial condition, assets, business or
results of operations of ▇-▇, except for (a) Liabilities disclosed in the ▇-▇
Financial Statements or in this Agreement, (b) Liabilities that have arisen
subsequent to December 31, 1997 in the Ordinary Course of Business of ▇-▇ (none
of which is a Liability resulting from breach of contract, fraud or other tort,
infringement or lawsuit), and (c) Liabilities set forth under the caption
"Liabilities" in the ▇-▇ Shareholders Disclosure Letter.
                  4.10 NO MATERIAL ADVERSE CHANGE. Since December 31, 1997,
there has not been, occurred or arisen any event which has had or is reasonably
likely to have a Material Adverse Effect on ▇-▇.
                  4.11 LITIGATION. Except as set forth under the caption
"Litigation" in the ▇-▇ Shareholders Disclosure Letter, there are no actions,
suits, proceedings, orders or investigations pending or, to the Knowledge of the
▇-▇ Shareholders, threatened against or relating to ▇-▇, at law or in equity, or
before or by any Governmental Authority. Except as set forth under such caption,
to the Knowledge of the ▇-▇ Shareholders, ▇-▇ has never received any written
opinion or legal advice to the effect 
                                      -30-
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that ▇-▇ is exposed from a legal standpoint to any Liability which is reasonably
likely to have a Material Adverse Effect on ▇-▇.
                  4.12 BROKERAGE. There are no claims for brokerage commissions,
finders' fees or similar compensation in connection with the transactions
contemplated by this Agreement based on any arrangement or agreement made by or
on behalf of ▇-▇ or the ▇-▇ Shareholders.
                  4.13 EMPLOYEES; RETIREE WELFARE BENEFITS LIABILITIES. No key
executive employee of ▇-▇ has given notice of termination of his employment. ▇-▇
has complied in all material respects with, or has cured all material
non-compliances with, all laws relating to the employment of labor, including
provisions thereof relating to wages, hours, equal opportunity, collective
bargaining and the payment of social security and other Taxes. ▇-▇ does not
maintain any Employee Welfare Benefit Plan which provides benefits to current or
future retirees from ▇-▇ (or their spouses or dependents) of the type subject to
Financial Accounting Standards Board Statement No. 106 reporting requirements.
                  4.14 COMPLIANCE WITH LAWS; PERMITS; CERTAIN OPERATIONS. ▇-▇
and its officers, agents and employees have complied in all material respects
with, or have cured all material non-compliances with, all applicable laws and
regulations of U.S. and non-U.S. governments and all agencies thereof which
affect the business or any owned or leased properties of ▇-▇ and to which ▇-▇
may be subject, and, except as set forth under the caption "Compliance with
Laws" in the ▇-▇ Shareholders Disclosure Letter, no claims have been filed
against ▇-▇ alleging a violation of any such law or regulation, except for any
failures to so comply that would not, individually or in the aggregate, have a
Material Adverse Effect on ▇-▇ and except for any such claims that would not,
individually or in the aggregate, have a Material Adverse Effect on ▇-▇.
                  4.15 AFFILIATE TRANSACTIONS. Except as set forth under the
caption "Affiliate Transactions" in the ▇-▇ Shareholders Disclosure Letter, to
the Knowledge of the ▇-▇ Shareholders, no ▇-▇ Shareholder and no officer or
director of ▇-▇ and no member of the immediate family of any such ▇-▇
Shareholder, officer or director, and no entity in which any of such persons
owns any beneficial interest (other than a publicly held corporation whose stock
is traded on a national securities exchange or in the over-the-counter market
and less than 5% of the stock of which is beneficially owned by any of such
persons) (collectively "▇-▇ INSIDERS"), has any agreement of any kind with ▇-▇
or any interest in any property, real, personal or mixed, tangible or
intangible, used in or pertaining to the business of ▇-▇. For purposes of the
preceding sentence, the members of the immediate family of an officer or
director shall consist of the spouse, parents, children (natural and adopted),
siblings, mothers-and fathers-in-law, sons-and daughters-in-law, and brothers-
and sisters-in-law of such officer or director.
                                      -31-
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                  4.16 TAX STATUS OF MERGER. Neither of the ▇-▇ Shareholders
has, nor has ▇-▇, taken or agreed to take, or failed to take, any action that
would prevent the Merger from constituting a "reorganization" under Section
368(a) of the Code.
                                    ARTICLE 5
                    REPRESENTATIONS AND WARRANTIES OF PITTWAY
                  Pittway hereby represents and warrants to Penton as follows:
                  5.1 ORGANIZATION AND QUALIFICATION. Pittway is a corporation
duly organized, validly existing and in good standing under the laws of the
State of Delaware, and is qualified to do business in the State of Illinois.
                  5.2 AUTHORITY RELATIVE TO THIS AGREEMENT.
                             (a) Pittway has the requisite corporate power to
         enter into this Agreement and to carry out its obligations hereunder.
                             (b) The execution and delivery of this Agreement by
         Pittway and the consummation by Pittway of the transactions on its part
         contemplated hereby (including the Spinoff) have been duly authorized
         by the Board of Directors of Pittway, and no other corporate
         proceedings on the part of Pittway, other than incidental implementing
         actions such as the setting of the record date and payment date for the
         Spinoff, are necessary to authorize this Agreement and such
         transactions.
                             (c) This Agreement has been duly executed and
         delivered by Pittway and constitutes a valid and binding obligation of
         Pittway, enforceable in accordance with its terms, subject to
         bankruptcy, insolvency, moratorium and other similar laws affecting
         creditors' rights generally and general principles of equity.
                             (d) Except as set forth under the caption
         "Authority" in a letter delivered to Penton by Pittway simultaneously
         with the execution of this Agreement (the "PITTWAY DISCLOSURE LETTER"),
         neither Pittway nor any of the Post-Spinoff Pittway Subsidiaries is
         subject to, or obligated under, any provision of
                                     (i) its charter or bylaws,
                                     (ii) any agreement, arrangement or
                  understanding (whether written or oral),
                                     (iii) any license, franchise or permit or
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                                     (iv) subject to compliance with the
                  statutes referred to in (e) below, any law, regulation, order,
                  judgment or decree,
         which would be breached or violated, or in respect of which a right of
         termination or acceleration or any Security Interest on any of Penton's
         or any of its Subsidiaries' stock or assets would be created, by
         Pittway's execution, delivery and performance of this Agreement and the
         consummation of the transactions on its part contemplated hereby
         (including the Spinoff), other than any such breach, violation, right
         of termination or acceleration or Security Interest which will not,
         individually or in the aggregate, have a Material Adverse Effect on
         Penton.
                             (e) Other than under the ▇▇▇▇-▇▇▇▇▇-▇▇▇▇▇▇ Act, the
         Exchange Act and the regulations under the foregoing, no Governmental
         Action is necessary on the part of Pittway for the consummation by
         Pittway of the transactions on its part contemplated by this Agreement,
         except for such Governmental Actions the failure to obtain or make
         which would not, individually or in the aggregate, have a Material
         Adverse Effect on Pittway or Penton.
                  5.3 BROKERAGE. There are no claims for brokerage commissions,
finders' fees or similar compensation in connection with the transactions
contemplated by this Agreement based on any arrangement or agreement made by or
on behalf of Pittway or any Post-Spinoff Pittway Subsidiary.
                  5.4 AFFILIATE TRANSACTIONS. Except as set forth under the
caption "Affiliate Transactions" in the Pittway Disclosure Letter, to the
Knowledge of Pittway, no officer or director of Pittway or of any Post-Spinoff
Pittway Subsidiary, no member of the immediate family of any such officer or
director, and no entity in which any of such persons owns any beneficial
interest (other than a publicly held corporation whose stock is traded on a
national securities exchange or in the over-the-counter market and less than 5%
of the stock of which is beneficially owned by any of such persons)
(collectively "PITTWAY INSIDERS"), has any agreement of any kind with Penton or
any of its Subsidiaries or any interest in any property, real, personal or
mixed, tangible or intangible, used in or pertaining to the business of Penton
or any of its Subsidiaries. For purposes of the preceding sentence, the members
of the immediate family of an officer or director shall consist of the spouse,
parents, children (natural and adopted), siblings, mothers-and fathers-in-law,
sons-and daughters-in-law, and brothers-and sisters-in-law of such officer or
director.
                                      -33-
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                                    ARTICLE 6
                     CONDUCT OF BUSINESS PENDING THE MERGER
                  6.1 CONDUCT OF PENTON BUSINESS PENDING THE MERGER. Penton
covenants and agrees that from and after the execution and delivery of this
Agreement and prior to the Effective Time, except as required to effect the
Spinoff or as otherwise expressly contemplated or permitted by this Agreement,
and with such additional exceptions as the ▇-▇ Shareholders shall have approved
in writing:
                             (a) The businesses of Penton and its Subsidiaries
         shall be conducted only in the Ordinary Course of Business of Penton,
         on an arms'-length basis and in accordance in all material respects
         with all applicable laws, rules and regulations; and
                             (b) Penton and each of its Subsidiaries (i) shall
         use all reasonable efforts to preserve intact its business organization
         and goodwill, keep available the services of its officers and employees
         as a group and maintain satisfactory relationships with suppliers,
         distributors, customers and others having business relationships with
         it; (ii) shall confer on a regular basis with the ▇-▇ Shareholders to
         report operational matters of Penton and its Subsidiaries and the
         general status of ongoing operations of Penton and its Subsidiaries;
         (iii) shall not take any action which would render, or which reasonably
         may be expected to render, any representation or warranty made by
         Penton in this Agreement untrue at, or at any time prior to, the
         Effective Time in any material respect; (iv) shall notify the ▇-▇
         Shareholders of any emergency or other change in the normal course of
         business of Penton or any of its Subsidiaries or in the operation of
         the properties of Penton or any of its Subsidiaries and of any
         governmental or third party complaints, investigations or hearings (or
         communications indicating that the same may be contemplated) relating
         to Penton or any of its Subsidiaries if such emergency, change,
         complaint, investigation or hearing would have a Material Adverse
         Effect on Penton or a material adverse effect on Penton's or
         Combination Subsidiary's ability to consummate the transactions
         contemplated by this Agreement; and (v) shall notify the ▇-▇
         Shareholders if it shall discover that any representation or warranty
         made by it in this Agreement was when made, or has subsequently become,
         untrue in any material respect.
         Notwithstanding the foregoing, it is expressly understood and agreed
that (i) no distribution of cash may be made by Penton to Pittway, whether or
not in the Ordinary Course of Business of Penton, if such action would result in
Penton's cash immediately prior to the Spinoff being less than the sum of (x)
the aggregate amount of Penton's then outstanding checks and (y) the aggregate
amount of Penton's then trade show deposits (net of Penton's then deferred costs
incurred with respect to trade shows), (ii) subject to (i), Penton may
distribute cash to Pittway immediately prior to the Spinoff, (iii) 
                                      -34-
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Penton and its Subsidiaries may acquire (through the acquisition of stock, the
acquisition of assets, merger or otherwise) the businesses and/or Business
Information Products of other Persons, and in connection with such acquisitions
may incur indebtedness and may commit to issue Penton Common contingent upon the
Spinoff, provided that the aggregate amount of indebtedness incurred by Penton
and its Subsidiaries in connection with such acquisitions (including
indebtedness assumed in connection with direct acquisitions of assets or
Business Information Products, but not indebtedness of Persons whose stock is
acquired) does not exceed $50.0 million and further provided that any issuance
of Penton Common committed to would not result in Pittway failing to control
Penton immediately prior to the Spinoff as described in Section 368(c) of the
Code, (iv) Penton may enter into joint venture arrangements with unaffiliated
Persons, (v) Penton and its Subsidiaries may dispose of (through the sale of
stock, the sale of assets, merger or otherwise) (A) the businesses set forth
under the caption "Possible Dispositions" in the Penton Disclosure Letter and
(B) Business Information Products not included in such businesses, provided that
the aggregate annual revenue attributable to such Business Information Products
at their respective dates of disposition does not exceed $10.0 million and
further provided that after giving effect to such dispositions Penton continues
to conduct an active trade or business as defined in Section 355(a)(1)(C) of the
Code, (vi) Penton may enter into credit arrangements to enable it to repay at
the time of the Spinoff its then outstanding indebtedness to Pittway and to
provide it with sufficient working capital for its foreseeable post-Spinoff
needs taking into account the provisions of this Agreement, and (vii) Penton may
enter into employment agreements with key Penton personnel and may amend
existing employment agreements with ▇▇▇▇▇▇ ▇. ▇▇▇▇ and ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇.
                  6.2 CONDUCT OF ▇-▇ BUSINESS PENDING THE MERGER. ▇-▇ and each
of the ▇-▇ Shareholders covenants and agrees that from and after the execution
and delivery of this Agreement and prior to the Effective Time, except as
expressly contemplated or permitted by this Agreement, and with such additional
exceptions as Penton and Pittway shall have approved in writing:
                             (a) The business of ▇-▇ shall be conducted only in,
         and ▇-▇ shall not take any action except in, the Ordinary Course of
         Business of ▇-▇, on an arms'-length basis and in accordance in all
         material respects with all applicable laws and rules and regulations;
                             (b) ▇-▇ shall not, directly or indirectly, do or
         permit to occur any of the following: (i) issue or incur any obligation
         to issue any shares of ▇-▇; (ii) sell, pledge, dispose of or encumber
         any of its assets, except in the Ordinary Course of Business of ▇-▇;
         (iii) acquire (by merger, exchange, consolidation, acquisition of stock
         or assets or otherwise) any corporation, partnership, joint venture or
         other business organization or division or material assets thereof;
         (iv) develop or acquire a new Business Information Product, discontinue
         or dispose of an existing Business Information Product or make any
         change to a Business 
                                      -35-
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         Information Product that is material to such Business Information
         Product; or (v) incur any indebtedness for borrowed money or issue any
         debt securities except the borrowing of working capital in the Ordinary
         Course of Business of ▇-▇ and refinancings or replacements of
         borrowings existing on the date hereof;
                             (c) ▇-▇ shall not, directly or indirectly, (i)
         enter into, adopt or modify (A) any employment, severance, or similar
         agreement or arrangement, (B) any bonus, profit sharing, compensation,
         stock option, pension, retirement, deferred compensation or other plan,
         agreement, trust, fund or arrangement (group or otherwise) for the
         benefit or welfare of any employee(s) or director(s) or (ii) grant any
         bonus, salary increase, severance or termination pay to any officer or
         director; or in the case of employees who are not officers or directors
         and who earn in excess of $40,000 per year, take any action with
         respect to the grant of any bonus, salary increase, severance or
         termination pay or with respect to any increase of benefits payable in
         effect on the date of this Agreement (provided that nothing in this
         Section 6.2(c) shall preclude bonus grants, salary increases, benefit
         increases and benefit plan amendments and modifications made in the
         Ordinary Course of Business of ▇-▇);
                             (d) ▇-▇ shall not, directly or indirectly, enter
         into or modify any contract, agreement or arrangement with any ▇-▇
         Insider;
                             (e) ▇-▇ shall use all reasonable efforts to cause
         its current insurance (or reinsurance) policies not to be canceled or
         terminated or any of the coverage thereunder to lapse, unless
         simultaneously with such termination, cancellation or lapse,
         replacement policies providing coverage equal to or greater than the
         coverage under the canceled, terminated or lapsed policies for
         substantially similar premiums are in full force and effect;
                             (f) ▇-▇ (i) shall use all reasonable efforts to
         preserve intact its business organization and goodwill, keep available
         the services of its officers and employees as a group and maintain
         satisfactory relationships with suppliers, distributors, customers and
         others having business relationships with it and (ii) shall not take
         any action which would render, or which reasonably may be expected to
         render, any representation or warranty made by the ▇-▇ Shareholders in
         this Agreement untrue at, or at any time prior to, the Effective Time
         in any material respect; and
                             (g) Each of the ▇-▇ Shareholders (i) shall confer
         on a regular basis with Penton and Pittway to report operational
         matters of ▇-▇ and the general status of ongoing operations of ▇-▇;
         (ii) shall notify Penton and Pittway if he shall discover that any
         representation or warranty made by the ▇-▇ Shareholders in this
         Agreement was when made, or has subsequently become, untrue in any
         material respect and (iii) shall notify Penton and Pittway of any
         emergency or other change in the normal course of business of ▇-▇ or in
         the 
                                      -36-
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         operation of its properties and of any governmental or third party
         complaints, investigations or hearings (or communications indicating
         that the same may be contemplated) if such emergency, change,
         complaint, investigation or hearing would have a Material Adverse
         Effect on ▇-▇ or a material adverse effect on ▇-▇'s or the ▇-▇
         Shareholders' ability to consummate the transactions contemplated by
         this Agreement.
         Notwithstanding the foregoing, it is expressly understood and agreed
that (i) subject to the condition in Section 8.3(i) and provided such action is
not financed directly or indirectly with indebtedness, ▇-▇ may, at any time and
from time to time prior to the Effective Time, distribute cash to the ▇-▇
Shareholders, and (ii) ▇-▇ may, immediately prior to the Effective Time,
distribute to the ▇-▇ Shareholders the then outstanding trade accounts
receivable of ▇-▇ (the "DISTRIBUTED ▇-▇ ACCOUNTS RECEIVABLE").
                                    ARTICLE 7
                              ADDITIONAL AGREEMENTS
                  7.1 ACCESS AND INFORMATION; CORPORATE RECORDS;
CONFIDENTIALITY. Penton, on the one hand, and ▇-▇, on the other hand, shall
afford each other and the accountants, counsel and other representatives of each
other full access upon reasonable notice and during normal business hours
throughout the period prior to the Effective Time to all of the properties and
Corporate Records of Penton and its Subsidiaries and of ▇-▇, respectively, and,
during such period, Penton, on the one hand, and ▇-▇, on the other hand, shall
furnish each other all information concerning the business, properties and
personnel of Penton and its Subsidiaries and of ▇-▇, respectively, as may
reasonably be requested.
                  ▇-▇ shall afford Penton full access upon reasonable notice and
during normal business hours throughout the period prior to the Effective Time
to all of the personnel of ▇-▇.
                  From and after the consummation of the Spinoff, Pittway shall
retain all Corporate Records owned by Pittway or under Pittway's control at the
time of the Spinoff (other than indirectly through Penton and its Subsidiaries)
relating to Penton and its Subsidiaries, shall provide Penton and the
accountants, counsel and other representatives of Penton full access upon
reasonable notice and during normal business hours to such Corporate Records for
the preparation of Tax Returns and other reasonable purposes and shall permit
Penton and such accountants, counsel and representatives to make copies thereof
at the expense of Penton. In the event that within seven years following the
Spinoff Pittway wishes to dispose of any such Corporate Records, Pittway shall
first give written notice thereof to Penton and Penton 
                                      -37-
   44
shall thereupon have 20 business days in which to take possession of such
Corporate Records (or any portion thereof) at the expense of Penton.
                  From and after the consummation of the Spinoff, Penton shall
(and shall cause its Subsidiaries to) retain all Corporate Records owned by it
and such Subsidiaries or under their control at the time of the Spinoff relating
to Penton and its Subsidiaries, shall provide Pittway and the accountants,
counsel and other representatives of Pittway full access upon reasonable notice
and during normal business hours to such Corporate Records for the preparation
of Tax Returns and other reasonable purposes and shall permit Pittway and such
accountants, counsel and representatives to make copies thereof at the expense
of Pittway. In the event that within seven years following the Spinoff Penton or
any of its Subsidiaries wishes to dispose of any such Corporate Records, Penton
shall first give written notice thereof to Pittway and Pittway shall thereupon
have 20 business days in which to take possession of such Corporate Records (or
any portion thereof) at the expense of Pittway.
                  Penton and Pittway will, and will cause their respective
Subsidiaries (in the case of Pittway, other than Penton and its Subsidiaries),
accountants, counsel and other representatives to, hold in strict confidence,
except to the extent disclosure is required by law, all non-public information
and Corporate Records obtained by them pursuant to this Section 7.1.
                  Penton and its Subsidiaries shall be entitled to continue to
use any stocks existing as of the consummation of the Spinoff of printed
materials currently used by Penton or its Subsidiaries which contain the name
"Pittway"; provided that (i) such materials may only be used in the same fashion
as used by Penton and its Subsidiaries prior to the Spinoff and only in
accordance with past practice; it being acknowledged and agreed by Penton that
such use of the name "Pittway" is being permitted solely as an accommodation by
Pittway to Penton and its Subsidiaries and (ii) in no event shall Penton or any
of its Subsidiaries use any such materials after the expiration of 90 days
following the consummation of the Spinoff. Nothing herein shall be deemed or
construed as giving Penton or any of its Subsidiaries any rights in or to the
name "Pittway".
                  7.2 REGISTRATION RIGHTS; CERTAIN FILINGS.
                             (a) DEMAND REGISTRATION. At any time during the 60
         days immediately following the second anniversary of the Effective
         Time, and provided no earlier request has been made by either or both
         of the ▇-▇ Shareholders pursuant to this Section 7.2(a), either or both
         of the ▇-▇ Shareholders may request the registration (the "DEMAND
         REGISTRATION") under the Securities Act of then Registrable Shares
         constituting at least 25% of the Merger Shares. The request for the
         Demand Registration shall specify the number of Registrable Shares
         requested to be registered. Within ten days after receipt of such
         request, if such request is by fewer than both the ▇-▇ 
                                      -38-
   45
         Shareholders, Penton will give written notice of such requested
         registration to the other ▇-▇ Shareholder and will include in such
         registration all Registrable Shares held by ▇-▇ Shareholders with
         respect to which Penton has received written requests for inclusion
         therein within 15 days after the sending of Penton's notice. If the
         Demand Registration is an underwritten registration, and if the
         managing underwriter(s) advise Penton that in their opinion the number
         of securities requested to be included in such registration exceeds the
         number which can be sold in an orderly manner in such offering within a
         price range acceptable to the holders of Registrable Shares
         participating in the Demand Registration, then, notwithstanding the
         preceding provisions of this Section 7.2(a), Penton will include in the
         Demand Registration only each ▇-▇ Shareholder's pro rata portion of the
         Registrable Shares to be included therein, on the basis of the numbers
         of Registrable Shares requested to be included in the Demand
         Registration. Penton will pay all Registration Expenses incurred in
         connection with the Demand Registration. The obligation of Penton to
         effect the Demand Registration hereunder shall be satisfied when a
         registration statement filed in accordance herewith becomes effective
         under the Securities Act. Penton may use the shortest form of
         registration statement (e.g., Form ▇-▇, ▇-▇ or S-3) which Penton is
         then eligible to use. Penton will not include in the Demand
         Registration any shares of Penton Common which are held by Persons
         other than ▇-▇ Shareholders without the prior written consent of the
         holders of at least a majority of the Registrable Shares held by ▇-▇
         Shareholders. Penton shall have the right to select the managing
         underwriter(s) for the Demand Registration if it is an underwritten
         registration, subject to the approval of the ▇-▇ Shareholders (which
         approval will not be unreasonably withheld or delayed).
                             (b) PIGGYBACK REGISTRATIONS. Whenever Penton
         proposes to register any Penton Common under the Securities Act (other
         than on Form S-8 or S-4 or any similar or successor forms) within the
         thirty (30) months following the Effective Time (a "PIGGYBACK
         REGISTRATION"), Penton will give prompt written notice to each of the
         ▇-▇ Shareholders known by it to hold Registrable Shares of its
         intention to effect such a registration and will include in such
         registration all Registrable Shares with respect to which Penton has
         received written requests for inclusion therein within 15 days after
         the sending of Penton's notice. Penton will pay all Registration
         Expenses incurred in connection with any Piggyback Registration. If a
         Piggyback Registration is an underwritten registration, and if the
         managing underwriter(s) advise Penton that in their opinion the number
         of securities requested to be included in such registration exceeds the
         number which can be sold in an orderly manner in such offering within a
         price range acceptable to Penton, then, notwithstanding the preceding
         provisions of this Section 7.2(b), Penton will include in such
         registration: first, the securities Penton proposes to sell; and
         second, only each ▇-▇ Shareholder's pro rata portion of the Registrable
         Shares to be included therein, on the basis of the numbers of
         Registrable Shares requested to be included in such Piggyback
         Registration. No holder of Registrable Shares may participate in any
         Piggyback 
                                      -39-
   46
         Registration which is underwritten unless such Person (a) agrees to
         sell such Person's securities on the basis provided in any underwriting
         arrangements approved by Penton and (b) completes and executes all
         questionnaires, powers of attorney, indemnities, underwriting
         agreements and other documents required under the terms of such
         underwriting arrangements; provided that no holder of Registrable
         Shares included in any underwritten registration shall be required to
         make any representations or warranties to Penton or the underwriters,
         or to agree to indemnify Penton or the underwriters, therein in the
         capacity as a selling stockholder other than with respect to such
         holder and such holder's intended method of distribution (but this
         proviso shall not limit the obligations of such holder under Section
         7.7(b)(i)).
                             (c) REGISTRATION COVENANTS. Whenever pursuant to
         this Agreement the holders of Registrable Shares have requested that
         any Registrable Shares be registered, and subject to the limitation on
         the number of shares to be registered set forth in Section 7.2(a),
         Penton will use all reasonable efforts to effect the registration of
         the sale of such Registrable Shares in accordance with the intended
         method of disposition thereof, and pursuant thereto Penton will as
         expeditiously as possible:
                                     (i) prepare and file with the Commission a
                  registration statement with respect to such Registrable Shares
                  and use all reasonable efforts to cause such registration
                  statement to become effective;
                                     (ii) prepare and file with the Commission
                  such amendments and supplements to such registration statement
                  and the prospectus used in connection therewith as may be
                  necessary to keep such registration statement effective for a
                  period of 90 days and comply with the provisions of the
                  Securities Act with respect to the disposition of all
                  securities covered by such registration statement during such
                  period in accordance with the intended methods of disposition
                  by the sellers thereof set forth in such registration
                  statement;
                                     (iii) furnish to each seller of Registrable
                  Shares covered by such registration statement such number of
                  copies of such registration statement, each amendment and
                  supplement thereto, the prospectus included in such
                  registration statement (including each preliminary prospectus)
                  and such other documents as such seller may reasonably request
                  in order to facilitate the disposition of such seller's
                  Registrable Shares covered by such registration statement;
                                     (iv) use all reasonable efforts to register
                  or qualify such Registrable Shares under such other securities
                  or blue sky laws of such United States jurisdictions as any
                  seller reasonably requests and do any and all other acts and
                  things which may be reasonably necessary or 
                                      -40-
   47
                  advisable to enable such seller to consummate the disposition
                  in such jurisdictions of such Registrable Shares owned by such
                  seller (provided that Penton will not be required to (i)
                  qualify generally to do business in any jurisdiction where it
                  would not otherwise be required to qualify but for this
                  subparagraph, (ii) subject itself to taxation in any such
                  jurisdiction or (iii) consent to general service of process in
                  any such jurisdiction);
                                     (v) notify each seller of such Registrable
                  Shares, at any time when a prospectus relating thereto is
                  required to be delivered under the Securities Act, of the
                  happening to its Knowledge of any event as a result of which
                  the prospectus included in such registration statement
                  contains an untrue statement of a material fact or omits any
                  fact necessary to make the statements therein not misleading,
                  and, at the request of any such seller, prepare a supplement
                  or amendment to such prospectus so that, as thereafter
                  delivered to the purchasers of such Registrable Shares, such
                  prospectus will not to its Knowledge contain an untrue
                  statement of a material fact or omit to state any fact
                  necessary to make the statements therein not misleading;
                                     (vi) cause all such Registrable Shares to
                  be listed on each securities exchange, or accepted for trading
                  on each trading system, on which Penton Common shares are then
                  listed or traded;
                                     (vii) cause all restrictive transfer
                  legends to be removed from the stock certificates evidencing
                  such Registrable Shares (subject to re-legending in the event
                  not sold pursuant to such registration statement) and cause
                  certificates evidencing the remaining Registrable Shares to be
                  issued to the holders of such Registrable Shares in such
                  denominations as such holders may reasonably request; and
                                     (viii) otherwise use all reasonable efforts
                  to comply with all applicable rules and regulations of the
                  Commission; and make available to its security holders, as
                  soon as reasonably practicable, an earnings statement covering
                  the period of at least twelve months beginning with the first
                  day of Penton's first full calendar quarter after the
                  effective date of the registration statement, which earnings
                  statement shall satisfy the provisions of Section 11(a) of the
                  Securities Act and Rule 158 thereunder.
                             (d) HOLDBACK AGREEMENTS. Each of the ▇-▇
         Shareholders agrees not to effect any public sale or distribution
         (including sales pursuant to Securities Act Rule 144) of equity
         securities of Penton, or of any securities convertible into or
         exchangeable or exercisable for such securities, during the seven days
         prior to and the 90-day period beginning on the effective date of any
         registration of Penton Common Stock under the Securities Act (other
         than a
                                      -41-
   48
         registration on Form ▇-▇, ▇▇▇▇ ▇-▇ or any successor forms) except as
         part of such registration, unless, in the case of such a registration
         which is an underwritten registration, the underwriter(s) managing the
         registered public offering otherwise agree. Penton agrees not to
         effect any public sale or distribution of its equity securities, or
         any securities convertible into or exchangeable or exercisable for
         such securities, during the seven days prior to and during the 90-day
         period beginning on the effective date of the Demand Registration      
         except pursuant to registrations on Form ▇-▇, ▇▇▇▇ ▇-▇ or any
         successor forms, unless, in the case of such a registration which is
         an underwritten registration, the underwriter(s) managing the
         registered public offering otherwise agree.
                             (e) INDEMNIFICATION RELATING TO REGISTRATIONS.
                                     (i) Penton agrees to indemnify, to the
                  extent permitted by law, each holder of Registrable Shares
                  included in the Demand Registration or any Piggyback
                  Registration against all losses, claims, damages, liabilities
                  and expenses arising out of, based upon or caused by any
                  untrue or alleged untrue statement of material fact contained
                  in any registration statement, prospectus or preliminary
                  prospectus or any amendment thereof or supplement thereto
                  filed in connection with such Registration or any omission or
                  alleged omission of a material fact required to be stated
                  therein or necessary to make the statements therein not
                  misleading, except insofar as the same are caused by or
                  contained in any information furnished in writing to Penton by
                  such holder for use therein or by such holder's failure to
                  deliver a copy of the registration statement or prospectus or
                  any amendment or supplement thereto after Penton has furnished
                  such holder with a sufficient number of copies of the same. In
                  connection with an underwritten offering, Penton will
                  indemnify such underwriters, their officers and directors and
                  each Person who controls such underwriters (within the meaning
                  of the Securities Act) to the comparable extent as provided
                  above with respect to the indemnification of the holders of
                  Registrable Shares.
                                     (ii) In connection with any registration
                  statement in which a holder of Registrable Shares is
                  participating, each such holder will furnish to Penton in
                  writing such information and affidavits as Penton reasonably
                  requests for use in connection with such registration
                  statement and, to the extent permitted by law, will indemnify
                  Penton, its directors and officers and each Person who
                  controls Penton (within the meaning of the Securities Act)
                  against any losses, claims, damages, liabilities and expenses
                  arising out of, based upon or caused by any untrue or alleged
                  untrue statement of material fact contained in any
                  registration statement, prospectus or preliminary prospectus
                  or any amendment thereof or supplement thereto filed in
                  connection with the 
                                      -42-
   49
                  Demand Registration or such Piggyback Registration or any
                  omission or alleged omission of a material fact required to be
                  stated therein or necessary to make the statements therein not
                  misleading, but only to the extent that such untrue statement
                  or omission is contained in any information furnished in
                  writing to Penton by such holder for use therein.
                                     (iii) Any Person entitled to
                  indemnification under this Section 7.2(e) will (i) give prompt
                  written notice to the indemnifying party of any claim with
                  respect to which it seeks indemnification and (ii) unless
                  in such indemnified party's reasonable judgment a conflict of
                  interest between such indemnified and indemnifying parties may
                  exist with respect to such claim, permit such indemnifying
                  party to assume the defense of such claim with counsel
                  reasonably satisfactory to the indemnified party. If such
                  defense is assumed, the indemnifying party will not be subject
                  to any liability for any settlement made by the indemnified
                  party without its consent (but such consent will not be
                  unreasonably withheld). An indemnifying party who is not
                  entitled to, or elects not to, assume the defense of a claim
                  will not be obligated to pay the fees and expenses of more
                  than one counsel for all parties indemnified by such
                  indemnifying party with respect to such claim, unless in the
                  reasonable judgment of any indemnified party a conflict of
                  interest may exist between such indemnified party and any
                  other of such indemnified parties with respect to such claim.
                                     (iv) The indemnification provided for under
                  this Section 7.2(e) will remain in full force and effect
                  regardless of any investigation made by or on behalf of the
                  indemnified party or any officer, director or controlling
                  Person of such indemnified party and will survive the transfer
                  of securities.
                                     (v) If the indemnification provided for in
                  this Section 7.2(e) is unavailable to or insufficient to hold
                  harmless an indemnified party under subsection (i) or (ii)
                  above in respect of any losses, claims, damages, liabilities
                  or expenses (or actions in respect thereof) referred to
                  therein, then each indemnifying party shall contribute to the
                  amount paid or payable by such indemnified party as a result
                  of such losses, claims, damages or liabilities (or actions in
                  respect thereof) in such proportion as is appropriate to
                  reflect the relative fault of Penton, on the one hand, and the
                  ▇-▇ Shareholders who participated in the Demand Registration
                  or Piggyback Registration, on the other, in connection with
                  the statements or omissions which resulted in such losses,
                  claims, damages, liabilities or expenses (or actions in
                  respect thereof), as well as any other relevant equitable
                  considerations. The relative fault shall be determined by
                  reference to, among other things, whether the untrue or
                  alleged untrue statement of a material fact or the 
                                      -43-
   50
                  omission or alleged omission to state a material fact relates
                  to information supplied by Penton, on the one hand, or such
                  ▇-▇ Shareholders, on the other, and the parties' relative
                  intent, knowledge, access to information and opportunity to
                  correct or prevent such statement or omission. Penton and the
                  ▇-▇ Shareholders agree that it would not be just and equitable
                  if contribution pursuant to this subsection (v) were
                  determined by pro rata allocation or by any other method of
                  allocation which does not take account of the equitable
                  considerations referred to above in this subsection (v). The
                  amount paid or payable by an indemnified party as a result of
                  the losses, claims, damages, liabilities or expenses (or
                  actions in respect thereof) referred to above in this
                  subsection (v) shall be deemed to include any legal or other
                  expenses reasonably incurred by such indemnified party in
                  connection with investigating or defending any such action or
                  claim.
                            (f) RESALE RESTRICTIONS. Each of the ▇-▇
         Shareholders hereby acknowledges that:
                                     (i) the shares of Penton Common to be
                  issued to him pursuant to Section 2.4(e)(ii) and any shares of
                  Penton Common that may be issued to him pursuant to Section
                  2.4(h) cannot be resold except pursuant to a registration
                  statement which has become effective under the Securities Act
                  or unless an exemption from the registration requirements of
                  the Securities Act is legally available;
                                     (ii) except as and to the extent expressly
                  provided in (a) and (b) above, Penton is not obligated to so
                  register any of such shares;
                                     (iii) each certificate representing Penton
                  Common shares issued pursuant to this Agreement shall be
                  imprinted with a legend in substantially the following form:
                             "The securities represented by this certificate
                             have not been registered under the Securities Act
                             of 1933, as amended, or under the securities laws
                             of any state or other jurisdiction (together, the
                             "Securities Laws") and may not be offered for sale,
                             sold, transferred or otherwise disposed of except
                             after delivery to the issuer of a written opinion
                             reasonably satisfactory to the issuer from Skadden,
                             Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ (Illinois) or other
                             counsel satisfactory to the issuer that the
                             proposed disposition will not require registration
                             under applicable Securities Laws"; and
                                      -44-
   51
                                     (iv) such ▇-▇ Shareholder has consulted
                  with his counsel, Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇
                  (Illinois), regarding the effect on such ▇-▇ Shareholder of
                  the foregoing clauses of this Section.
                  Penton agrees that promptly following its receipt of a written
request from a ▇-▇ Shareholder for removal of the legend described in clause
(f)(iii) above from some or all of his certificates referred to in such clause,
and provided such request is accompanied by such certificate(s) duly endorsed
for surrender and by a written opinion reasonably satisfactory to Penton from
Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ (Illinois) or other counsel reasonably
satisfactory to Penton that the shares represented by such certificate(s) may
thereafter be freely transferred under applicable Securities Laws, Penton will
cause a new certificate representing such shares, not imprinted with such
legend, to be issued to such ▇-▇ Shareholder.
                  Penton further agrees that for so long after the Effective
Time as such action remains a condition to the ▇-▇ Shareholders' ability to sell
under Securities Act Rule 144 shares of Penton Common issued pursuant to this
Agreement, Penton will remain current in its periodic filings under the Exchange
Act.
                             (g) OBLIGATION OF THE ▇-▇ SHAREHOLDERS TO SUPPLY
         INFORMATION. Each of the ▇-▇ Shareholders shall as expeditiously as
         practicable: (i) supply all information concerning him and his
         Affiliates, and ▇-▇ and its Affiliates, and any other information
         required by or under the rules and regulations or policies of the
         Commission or any other Governmental Authority, as reasonably requested
         by Pittway or Penton (A) in connection with filings to be made by
         Pittway or Penton with the Commission under the Securities Act or the
         Exchange Act in connection with the transactions contemplated by this
         Agreement (including without limitation any registration statement
         filed by Penton under the Securities Act in connection with the
         registration of the Penton Common to be issued in the Spinoff, any
         registration statement filed by Penton under the Securities Act
         pursuant to the Demand Registration or any Piggyback Registration, the
         registration statement to be filed by Penton under the Exchange Act to
         register the Penton Common and any registration statement filed under
         the Securities Act in connection with any post-Merger issuance to raise
         capital), and (B) in connection with any blue sky or state securities
         filings made by Penton in connection with the transactions contemplated
         by this Agreement; (ii) take such actions as reasonably may be required
         to respond to any comments received from the Commission or any other
         Governmental Authority with respect to any of the foregoing; and (iii)
         take all such other actions which may reasonably be necessary to
         satisfy any requirements imposed by any Governmental Authority in
         connection with the Spinoff or the Merger or by any stock exchange or
         quotation system in connection with the listing or inclusion in a
         quotation system of the Penton Common. The ▇-▇ Shareholders warrant
         that the information supplied by the ▇-▇ Shareholders pursuant to this
         Section 7.2(g) will not contain an untrue statement of material fact,
         or omit to state a material 
                                      -45-
   52
         fact required to be stated or necessary in order to make the statements
         contained therein not misleading. The ▇-▇ Shareholders agree to notify
         Pittway and Penton promptly in the event any information provided by
         them for use in the filings described in this Section 7.2(g) become
         false or misleading and agree to promptly furnish corrected
         information.
                             (h) OBLIGATION OF PENTON TO SUPPLY INFORMATION.
         Penton shall as expeditiously as practicable: (i) supply all
         information concerning it and its Affiliates (other than Pittway or any
         Post-Spinoff Pittway Subsidiaries) and any other information required
         by or under the rules and regulations of the Commission or any other
         Governmental Authority, as reasonably requested by Pittway in
         connection with filings to be made by Pittway with the Commission under
         the Exchange Act in connection with the transactions contemplated by
         this Agreement; (ii) take such actions as reasonably may be required to
         respond to any comments received from the Commission or any other
         Governmental Authority with respect to any of the foregoing; and (iii)
         take all such other actions which may reasonably be necessary to
         satisfy any requirements imposed by any Governmental Authority in
         connection with the Spinoff or the Merger. Penton warrants that the
         information supplied by Penton pursuant to this Section 7.2(h) will not
         contain an untrue statement of material fact, or omit to state a
         material fact required to be stated or necessary in order to make the
         statements contained therein not misleading. Penton agrees to notify
         Pittway promptly in the event any information provided by it for use in
         the filings described in this Section 7.2(h) shall become false or
         misleading and agrees to promptly furnish corrected information.
                             (i) OBLIGATION TO DELIVER CERTAIN FILINGS. Prior to
         filing any registration statement or filing made by Penton or Pittway
         of the kind described in this Section 7.2, and prior to filing any
         amendment or supplement to any of the foregoing, Penton or Pittway, as
         the case may be, shall deliver or cause to be delivered to the ▇-▇
         Shareholders and their counsel drafts of the documents to be filed. The
         information in such documents as it relates to, or as it includes
         information that relates to, ▇-▇ or its Affiliates, or the ▇-▇
         Shareholders or their Affiliates, shall be deemed approved by the ▇-▇
         Shareholders if both ▇-▇ Shareholders shall approve it or if neither
         ▇-▇ Shareholder shall have objected in writing to such information
         within ten (10) days after receiving such documents. All such documents
         shall be deemed to have been delivered: when delivered by hand, if
         personally delivered; three business day after being deposited with a
         reputable express courier service (charges prepaid); five business days
         after being deposited in the mail, postage prepaid, if delivered by
         mail; when answered back, if telexed; and when receipt acknowledged (by
         a telecopy machine or otherwise), if telecopied.
                  7.3 OTHER NECESSARY ACTION; FURTHER ASSURANCE. Subject to the
terms and conditions herein provided, Penton, Combination Subsidiary, ▇-▇ and
the ▇-▇ Shareholders agree to use all reasonable efforts to take, or cause to be
taken, all action and to do, or cause to be done, all things necessary, proper
or advisable to cause the satisfaction of the conditions to the obligations of
the other Parties to effect the Merger (or, in the case of Pittway, the
conditions to its obligation to effect the Spinoff) and to consummate and make
effective as promptly as practicable the transactions contemplated by this
Agreement, including using reasonable efforts to obtain all necessary waivers,
consents and approvals (including without limitation, in the case of Penton, any
third party consents or assignments necessary to consummate the Spinoff and, in
the case of ▇-▇ and the ▇-▇ 
                                      -46-
   53
Shareholders, any third party consents or assignments necessary to consummate
the Merger) and to effect all necessary registrations and filings, including,
but not limited to, filings under the Securities Act and the Exchange Act and
submissions of information requested by Governmental Authorities. Such actions
by Penton and ▇-▇ shall include, without limitation, the preparation and
delivery of their respective financial statements, and the delivery of the
reports thereon and related consents, required for the registration statement
referred to in Section 8.1(i). Subject to the terms and conditions herein
provided, Pittway agrees to use all reasonable efforts to take, or cause to be
taken, all action and to use all reasonable efforts to do, or cause to be done,
all things necessary, proper or advisable to cause the Spinoff to be consummated
and to cause the satisfaction of the conditions set forth in Sections 8.2 and
8.3 that are to be satisfied by Pittway.
                  Without limiting the generality of the preceding paragraph,
each of the Parties shall promptly file any Notification and Report Forms and
related material that it may be required to file in connection with the
transactions contemplated hereby with the Federal Trade Commission and the
Antitrust Division of the United States Department of Justice under the
▇▇▇▇-▇▇▇▇▇-▇▇▇▇▇▇ Act, and shall promptly make any further filings pursuant
thereto that may be necessary, proper or advisable.
                  Each of the Parties agrees that at any time and from time to
time after the Effective Time such Party will execute and deliver to any other
Party such further instruments or documents, and will take all such other
action, as may be reasonably required to give effect to the transactions
contemplated hereunder.
                  Penton agrees to use all reasonable efforts to seek the
release at or prior to the consummation of the Spinoff of Pittway from any
guarantee or other arrangement under which Pittway is obligated with respect to
any Liability of Penton or any of its Subsidiaries and agrees to use its best
efforts to seek such release after such consummation to the extent not obtained
prior thereto. "Reasonable efforts" shall include Penton's delivery of
substitute guarantees or other arrangements.
                  7.4 CERTAIN TAX MATTERS. Penton agrees not to take (directly
or indirectly), and not to permit any of its Subsidiaries to take (directly or
indirectly), any action (whether prior to, at the time of or after the Spinoff)
which would cause the Spinoff not to be tax free to Pittway, the Post-Spinoff
Pittway Subsidiaries and the stockholders of Pittway under the provisions of
Section 355 of the Code.
                                      -47-
   54
                  Each of the ▇-▇ Shareholders agrees not to take (directly or
indirectly) or fail to take (directly or indirectly) any action (whether prior
to, at the time of or after the Effective Time) and not to permit ▇-▇ to take
(directly or indirectly) or fail to take (directly or indirectly) any action
prior to the Effective Time which would cause the Merger (i) to give rise to any
Tax to ▇-▇ or the Surviving Corporation or (ii) not to constitute a
"reorganization" under Section 368(a) of the Code. The failure of the ▇-▇
Shareholders to give their optional notice described in Section 2.4(h) shall not
constitute a breach of this agreement.
                  Penton agrees not to take (directly or indirectly) any action
after the Effective Time which would cause the Merger (i) to give rise to any
Tax to the Surviving Corporation, ▇-▇ or the ▇-▇ Shareholders or (ii) not to
constitute a "reorganization" under Section 368(a) of the Code. Neither the
failure of Penton to give its optional notice described in Section 2.4(h) nor
any payment by Penton pursuant to Section 2.4(e)(ii)(B), 2.4(g), 2.4(h) or 7.16
shall constitute a breach of this agreement.
                  After the consummation of the Spinoff, Penton will not take
(directly or indirectly), or permit any of its Subsidiaries to take (directly or
indirectly), any action that would increase the Tax Liability of any of the
companies included in Pittway's Affiliated Group for any period ending at or
prior to or including the consummation of the Spinoff.
                  After the Effective Time, the ▇-▇ Shareholders will not take
(directly or indirectly) any action that would increase the Tax Liability of ▇-▇
for any period ending at or prior to or including the Effective Time.
                  7.5 NO NEGOTIATIONS, ETC.
                             (a) During the period prior to the consummation of
         the Spinoff, except as permitted by the final paragraph of Section 6.1,
         Pittway shall not, directly or indirectly, through any officer,
         director, agent or otherwise, solicit, initiate or encourage submission
         of any proposal or offer from any Person (including any of its officers
         or employees) relating to any liquidation, dissolution,
         recapitalization, merger, consolidation or acquisition or purchase of
         all or a material portion of the assets of, or any equity interest in,
         Penton or any of its Subsidiaries or other similar transaction or
         business combination involving Penton or any of its Subsidiaries or
         participate in any negotiations regarding, or furnish to any other
         Person any information with respect to, or otherwise cooperate in any
         way with, or assist or participate in, facilitate or encourage, any
         effort or attempt by any other Person to do or seek any of the
         foregoing. Pittway shall promptly notify Penton and the ▇-▇
         Shareholders if any such proposal or offer, or any inquiry from or
         contact with any Person with respect thereto, is made and shall
         promptly provide Penton and the ▇-▇ Shareholders with such information
         regarding such proposal, offer, inquiry or contact as Penton and the
         ▇-▇ Shareholders may request.
                                      -48-
   55
                             (b) During the period prior to the Effective Time,
         except as permitted by the final paragraph of Section 6.1, Penton shall
         not, directly or indirectly, through any officer, director, agent or
         otherwise, solicit, initiate or encourage submission of any proposal or
         offer from any Person (including any of its officers or employees)
         relating to any liquidation, dissolution, recapitalization, merger,
         consolidation or acquisition or purchase of all or a material portion
         of the assets of, or any equity interest in, Penton or any of its
         Subsidiaries or other similar transaction or business combination
         involving Penton or any of its Subsidiaries or participate in any
         negotiations regarding, or furnish to any other Person any information
         with respect to, or otherwise cooperate in any way with, or assist or
         participate in, facilitate or encourage, any effort or attempt by any
         other Person to do or seek any of the foregoing. Penton shall promptly
         notify the ▇-▇ Shareholders and Pittway if any such proposal or offer,
         or any inquiry from or contact with any Person with respect thereto, is
         made and shall promptly provide the ▇-▇ Shareholders and Pittway with
         such information regarding such proposal, offer, inquiry or contact as
         the ▇-▇ Shareholders and Pittway may request.
                             (c) During the period prior to the Effective Time,
         the ▇-▇ Shareholders shall not (nor shall they permit ▇-▇ to), directly
         or indirectly, through any officer, director, agent or otherwise,
         solicit, initiate or encourage submission of any proposal or offer from
         any Person (including any officers or employees of ▇-▇) relating to any
         liquidation, dissolution, recapitalization, merger, consolidation or
         acquisition or purchase of all or a material portion of the assets of,
         or any equity interest in, ▇-▇ or other similar transaction or business
         combination involving ▇-▇ or participate in any negotiations regarding,
         or furnish to any other Person any information with respect to, or
         otherwise cooperate in any way with, or assist or participate in,
         facilitate or encourage, any effort or attempt by any other Person to
         do or seek any of the foregoing. The ▇-▇ Shareholders shall promptly
         notify Penton and Pittway if any such proposal or offer, or any inquiry
         from or contact with any Person with respect thereto, is made and shall
         promptly provide Penton and Pittway with such information regarding
         such proposal, offer, inquiry or contact as Penton and Pittway may
         request.
                  7.6 EXPENSES. Subject to Section 9.2, and provided that Penton
will bear the costs and expenses of the audit of ▇-▇'s financial statements
required for the registration statement referred to in Section 8.1(i), the ▇-▇
Shareholders, jointly and severally, will bear the costs and expenses (including
legal fees and expenses) incurred by ▇-▇ or the ▇-▇ Shareholders in connection
with the transactions contemplated hereby, Pittway will bear its costs and
expenses (including legal fees and expenses) incurred in connection with this
Agreement and the transactions contemplated hereby and Penton will bear its
costs and expenses (including legal fees and expenses) incurred in connection
with this Agreement and the transactions contemplated hereby.
                                      -49-
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                  7.7 INDEMNIFICATION AND HOLD HARMLESS AGREEMENTS.
                             (a) PENTON INDEMNIFICATION PROVISIONS FOR BENEFIT
         OF THE ▇-▇ SHAREHOLDERS. Penton agrees to indemnify, defend and hold
         harmless the ▇-▇ Shareholders from and against any Adverse Consequences
         asserted against or imposed upon or incurred by either of them
         resulting from, relating to, or by reason of
                             (i) any breach by Penton of any of the
                  representations and warranties set forth in Article 3 (after
                  giving effect to any disclosures made by Penton pursuant to
                  Section 7.9) or any breach by Penton or Combination Subsidiary
                  of any covenant thereof in this Agreement, or
                             (ii) any liability of any former Subsidiary of
                  Penton (as of immediately prior to the Effective Time) other
                  than any Subsidiary referred to under the caption "Possible
                  Dispositions" in the Penton Disclosure Letter (it being
                  understood that such Liabilities shall include without
                  limitation any Tax Liabilities of any such former Subsidiary,
                  but only to the extent not directly attributable to Penton or
                  its Subsidiaries (as of immediately prior to the Effective
                  Time), and any Control Group Liability of Penton to the extent
                  it is directly attributable to any such former Subsidiary).
                             (b) ▇-▇ SHAREHOLDERS INDEMNIFICATION PROVISIONS FOR
         BENEFIT OF PENTON AND COMBINATION SUBSIDIARY. The ▇-▇ Shareholders,
         jointly and severally, agree to indemnify, defend and hold harmless
         Penton and Combination Subsidiary and their respective directors,
         officers, employees and agents from and against any Adverse
         Consequences asserted against or imposed upon or incurred by any of
         them resulting from, relating to, or by reason of
                                     (i) any breach by the ▇-▇ Shareholders of
                  any of the representations and warranties set forth in Article
                  4 (after giving effect to any disclosures made by the ▇-▇
                  Shareholders pursuant to Section 7.9) or any breach by ▇-▇ or
                  either ▇-▇ Shareholder of any covenant thereof in this
                  Agreement,
                                     (ii) any Liability of any current or former
                  Affiliate of ▇-▇ (as of immediately prior to the Effective
                  Time) (it being understood that such Liabilities shall include
                  without limitation any Tax Liabilities of any such Affiliate,
                  but only to the extent not directly attributable to ▇-▇, and
                  any Control Group Liability of ▇-▇ to the extent it is
                  directly attributable to any such Affiliate), or
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                                     (iii) any untrue or alleged untrue
                  statement of material fact contained in any registration
                  statement or filing made by Penton of the kind described in
                  Section 7.2(g), or any amendment or supplement to any of the
                  foregoing, or any omission or alleged omission of a material
                  fact required to be stated in any of the foregoing or
                  necessary to make the statements therein not misleading, but
                  only to the extent that such untrue statement or alleged
                  untrue statement or such omission or alleged omission relates
                  to ▇-▇ or its Affiliates or the ▇-▇ Shareholders or their
                  respective Affiliates (in each case not including Penton
                  notwithstanding the occurrence of the Effective Time) and is
                  contained in any information furnished in writing by a ▇-▇
                  Shareholder pursuant to Section 7.2(g) or is deemed approved
                  by the ▇-▇ Shareholders pursuant to Section 7.2(i).
                             (c) PITTWAY INDEMNIFICATION PROVISIONS FOR BENEFIT
         OF PENTON. Pittway agrees to indemnify, defend and hold harmless Penton
         and its Subsidiaries and its and their directors, officers, employees
         and agents from and against the entirety of any Adverse Consequences
         asserted against or imposed upon or incurred by any of them resulting
         from, relating to, or by reason of
                                     (i) any breach by Pittway of any of the
                  representations and warranties set forth in Article 5 (after
                  giving effect to any disclosures made by Pittway pursuant to
                  Section 7.9) or any covenant of Pittway in this Agreement,
                                     (ii) except as provided under the caption
                  "Possible Dispositions" in the Penton Disclosure Letter, any
                  Tax Liabilities of Pittway's Affiliated Group for periods (or
                  portions thereof) ended at the time of or prior to the
                  consummation of the Spinoff which are not directly
                  attributable to Penton or its then or former Subsidiaries, and
                  any Control Group Liability arising out of events occurring or
                  circumstances existing as of or prior to the Spinoff which is
                  not directly attributable to Penton or its then or former
                  Subsidiaries, or
                                     (iii) any Tax imposed on Penton or its
                  Subsidiaries resulting from the failure, as a result of the
                  failure of Pittway to maintain control of Penton until the
                  Spinoff as described in Section 368(c) of the Code or of
                  actions taken after the Spinoff by Pittway or any company
                  which after the Spinoff is a Subsidiary of Pittway, of the
                  Spinoff to qualify as a tax-free (to Pittway and the
                  stockholders of Pittway) distribution under Section 355 of the
                  Code.
Notwithstanding the foregoing or any other provision of this Agreement, in no
event shall Pittway be obligated to indemnify, defend and hold harmless under
this Section 7.7(c) or otherwise be obligated with respect to any Adverse
Consequences arising out of the condition or sufficiency of the assets or stock
of Penton or any of its Subsidiaries 
                                      -51-
   58
or the existence of any Security Interests relating to such assets or stock, it
being expressly understood that Pittway is making no representations or
warranties directly or indirectly with respect to such assets or stock.
                             (d) PENTON INDEMNIFICATION PROVISIONS FOR BENEFIT
         OF PITTWAY. Penton agrees to indemnify, defend and hold harmless
         Pittway, the Post-Spinoff Pittway Subsidiaries, its and their
         directors, officers, employees and agents, and any Person who or which
         because of a relationship to Pittway or one of its Subsidiaries at the
         time of or prior to the consummation of the Spinoff would be liable
         (jointly and severally or otherwise) with respect to Liabilities of
         Pittway or of any Subsidiary of Pittway, from and against any Adverse
         Consequences asserted against or imposed upon or incurred by any of
         them resulting from, relating to, or by reason of
                                     (i) any Liability arising out of the
                  operations, acts, omissions or status of Penton or any of its
                  Subsidiaries (including without limitation any such Liability
                  arising out of events occurring or circumstances existing
                  prior to the Spinoff),
                                     (ii) any breach by Penton of any covenant
                  of Penton in this Agreement (including without limitation any
                  covenant set forth in Section 7.4), or
                                     (iii) any untrue or allegedly untrue
                  statement of material fact contained in any filing of Pittway
                  of the kind described in Section 7.2(h), or any amendment or
                  supplement to any of the foregoing, or any omission or alleged
                  omission of a material fact required to be stated in any of
                  the foregoing or necessary to make the statements therein not
                  misleading, but only to the extent that such untrue statement
                  or alleged untrue statement or such omission or alleged
                  omission relates to Penton or any of its Subsidiaries or their
                  respective Affiliates (other than Pittway or any Post-Spinoff
                  Pittway Subsidiary), or to ▇-▇ or an Affiliate of ▇-▇, or to
                  either ▇-▇ Shareholder or his Affiliates, or is contained in
                  any information furnished in writing by Penton or a ▇-▇
                  Shareholder pursuant to Section 7.2(g) or (h) or is deemed
                  approved by the ▇-▇ Shareholders pursuant to Section 7.2(i).
Notwithstanding the foregoing, in no event shall Penton be obligated to
indemnify, defend and hold harmless under this Section 7.7(d) with respect to
any Adverse Consequences from and against which Pittway has agreed to indemnify,
defend and hold harmless Penton and its Subsidiaries and its and their
directors, officers, employees and agents pursuant to Section 7.7(c) or with
respect to any Adverse Consequences by reason of Taxes which Pittway has agreed
to pay pursuant to the final sentence of Section 7.12(a).
                                      -52-
   59
                             (e) ▇-▇ SHAREHOLDERS INDEMNIFICATION PROVISIONS FOR
         BENEFIT OF PITTWAY. The ▇-▇ Shareholders, jointly and severally, agree
         to indemnify, defend and hold harmless Pittway and its directors,
         officers, employees and agents from and against any Adverse
         Consequences asserted against or imposed upon or incurred by any of
         them resulting from, relating to, or by reason of any untrue or
         allegedly untrue statement of material fact contained in any filing of
         Pittway of the kind described in Section 7.2(g), or any amendment or
         supplement to any of the foregoing, or any omission or alleged omission
         of a material fact required to be stated in any of the foregoing or
         necessary to make the statements therein not misleading, but only to
         the extent that such untrue statement or alleged untrue statement or
         such omission or alleged omission relates to ▇-▇ or an Affiliate of
         ▇-▇, or to either ▇-▇ Shareholder or his Affiliates (in each case not
         including Penton notwithstanding the occurrence of the Effective Time),
         and is contained in any information furnished in writing by a ▇-▇
         Shareholder pursuant to Section 7.2(g) or is deemed approved by the ▇-▇
         Shareholders pursuant to Section 7.2(i).
                             (f) MATTERS INVOLVING THIRD PARTIES. If any third
         party shall notify any Party (the "INDEMNIFIED PARTY") with respect to
         any matter which may give rise to a claim for indemnification against
         any other Party (the "INDEMNIFYING PARTY") under this Section 7.7, then
         the Indemnified Party shall notify each Indemnifying Party thereof
         promptly; PROVIDED, HOWEVER, that no delay on the part of the
         Indemnified Party in notifying any Indemnifying Party shall relieve the
         Indemnifying Party from any liability or obligation hereunder unless
         (and then solely to the extent that) the Indemnifying Party is damaged
         by such delay. In the event any Indemnifying Party notifies the
         Indemnified Party, within 15 days after the Indemnified Party has given
         notice of the matter, that the Indemnifying Party is assuming the
         defense thereof, (i) the Indemnifying Party will defend the Indemnified
         Party against the matter with counsel of its choice reasonably
         satisfactory to the Indemnified Party, (ii) the Indemnified Party may
         retain separate co-counsel at its sole cost and expense (except that
         the Indemnifying Party will be responsible for the fees and expenses of
         the separate co-counsel to the extent the counsel the Indemnifying
         Party has selected has a conflict of interest), (iii) the Indemnified
         Party will not consent to the entry of any judgment or enter into any
         settlement with respect to the matter without the written consent of
         the Indemnifying Party (not to be withheld or delayed unreasonably),
         and (iv) the Indemnifying Party will not consent to the entry of any
         judgment with respect to the matter, or enter into any settlement,
         which does not include a provision whereby the plaintiff or claimant in
         the matter releases the Indemnified Party from all Liability with
         respect thereto, without the written consent of the Indemnified Party
         (not to be withheld or delayed unreasonably). In the event no
         Indemnifying Party notifies the Indemnified Party, within 15 days after
         the Indemnified Party has given notice of the matter, that such
         Indemnifying Party is assuming the defense thereof, the Indemnified
         Party may defend against, or 
                                      -53-
   60
         enter into any settlement with respect to, the matter in any manner the
         Indemnified Party may deem appropriate.
                             (g) DETERMINATION OF ADVERSE CONSEQUENCES. The
         Parties shall make appropriate adjustments for Tax benefits and
         detriments and insurance proceeds (reasonably certain of receipt and
         utility in each case) and for the time cost of money (using a discount
         rate of 8% per annum) in determining the amount of Adverse Consequences
         for purposes of this Section 7.7.
                             (h) DETERMINATION OF INDEMNIFICATION REMEDIES. The
         Parties agree that a representation or warranty shall be breached if it
         is untrue or inaccurate, and that the Adverse Consequences resulting
         from such breach shall be the Adverse Consequences that would not have
         arisen had such representation or warranty been true and accurate in
         all respects. ▇▇▇▇▇▇, ▇-▇ and the ▇-▇ Shareholders further agree that
         notwithstanding any other provision of this Agreement, none of them
         shall be obligated to indemnify the other with respect to a breach of
         representation or warranty relating to the applicability to the
         transactions contemplated by this Agreement of, or relating to such
         transactions' not violating, any law regarding antitrust or the
         competitive impact of business combinations, it being acknowledged that
         the risk of any such applicability or violation is viewed by ▇▇▇▇▇▇,
         ▇-▇ and the ▇-▇ Shareholders as negligible.
                             (i) LIMITATIONS.
                                     (i) No claim for indemnification under this
                  Section 7.7 arising out of the breach of any representation or
                  warranty, including without limitation any claim related to
                  shares of Penton Common that have been sold, shall be made by
                  either ▇-▇ Shareholder until after the 15th day after the
                  conclusion of the Second Reference Period (or, if such day is
                  not a business day, the first business day thereafter).
                                     (ii) No claim for indemnification under
                  this Section 7.7 arising out of the breach of any
                  representation or warranty shall be made after the expiration
                  of the applicable survival period set forth in Section 10.1.
                                     (iii) Except to the extent such limitation
                  is prohibited by applicable law and such prohibition is not
                  waivable by the indemnitee, the indemnification provisions of
                  this Section 7.7 shall constitute the exclusive remedy of each
                  indemnitee in connection with this Agreement or the
                  transactions contemplated herein, including without limitation
                  for any of the matters described in Sections 7.7(a), (b), (c),
                  (d) and (e). To the 
                                      -54-
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                  maximum extent permitted by applicable law, each indemnitee
                  waives the benefit of any such prohibition.
                             (j) BASKET FOR CERTAIN INDEMNIFICATION CLAIMS.
         Penton shall have no obligation to indemnify the ▇-▇ Shareholders from
         and against any Adverse Consequences resulting from, relating to or by
         reason of any breach by Penton of the representations and warranties
         set forth in Article 3 (other than in the last sentence of Section
         3.3(b) or in Section 3.9) until the ▇-▇ Shareholders have suffered
         aggregate Adverse Consequences by reason of all such breaches as to
         which claims for indemnification are permitted hereunder and have been
         timely made against Penton within the period provided therefor
         hereunder in excess of $.5 million (at which point Penton shall be
         obligated to indemnify the ▇-▇ Shareholders from and against the
         Adverse Consequences exceeding $.5 million resulting from, relating to
         or by reason of all such breaches as to which claims for
         indemnification are permitted hereunder and have been timely made;
         which indemnification obligation shall be discharged in full by
         Penton's payment of an amount equal to such excess Adverse
         Consequences). The ▇-▇ Shareholders shall have no obligation to
         indemnify Penton from and against any Adverse Consequences resulting
         from, relating to or by reason of any breach by the ▇-▇ Shareholders of
         the representations and warranties contained in Article 4 (other than
         in the last four sentences of Section 4.4(b) or in Section 4.12) until
         Penton has suffered aggregate Adverse Consequences by reason of all
         such breaches as to which claims for indemnification have been timely
         made against the ▇-▇ Shareholders within the period provided therefor
         hereunder in excess of $.5 million (at which point the ▇-▇ Shareholders
         shall be obligated to indemnify Penton from and against the Adverse
         Consequences exceeding $.5 million resulting from, relating to or by
         reason of all such breaches as to which claims for indemnification have
         been timely made).
                  7.8 EMPLOYEE MATTERS.
                             (a) EMPLOYEE BENEFIT LIABILITIES. Except as
         otherwise set forth in this Agreement, as of the date of consummation
         of the Spinoff, Penton shall assume, and Penton shall thereafter bear
         and discharge, all Liabilities (whether or not such Liabilities arose
         prior to or arise on or after the date of consummation of the Spinoff)
         of Pittway and the Post-Spinoff Pittway Subsidiaries relating to
         employee benefits with respect to all Covered Penton
         Employees/Dependents, including but not limited to Liability for
         continuation medical benefits coverage pursuant to Section 4980B of the
         Code, Part 6, Subtitle B of Title I of ERISA or applicable state law
         and all other post-employment medical benefits coverage; provided,
         however, that such Liabilities with respect to employee benefits shall
         exclude any Liability directly resulting from Pittway's or a
         Post-Spinoff Pittway Subsidiary's willful or negligent failure, if any,
         to comply with ERISA or the Code, unless such failure of Pittway or
         such Subsidiary is, in whole or in part, caused or contributed to by
         any employee or 
                                      -55-
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         former employee of Penton or any of its Subsidiaries. Assets equal to
         certain of such Liabilities shall be transferred to Penton in
         accordance with the terms of this Section 7.8.
                             (b) PENTON PENSION PLANS. Effective as of the date
         of consummation of the Spinoff, Penton shall establish new Employee
         Pension Benefit Plans that meet the qualification requirements of
         Section 401(a) of the Code (and related trusts that meet the
         requirements of Section 501(a) of the Code) and that are (except as
         hereinafter provided in this Section 7.8) identical in all material
         respects to the Employee Pension Benefit Plans of Pittway that covered
         Penton Employees/Dependents immediately prior to the date of
         consummation of the Spinoff. Each Penton Employee Pension Benefit Plan
         shall contain terms and conditions sufficient to fulfill the
         requirements of Section 411(d)(6) of the Code concerning the
         preservation of optional forms of benefits in qualified plan asset
         transfers with respect to assets and Liabilities transferred from any
         Employee Pension Benefit Plan of Pittway to any such Employee Pension
         Benefit Plan of Penton in accordance with this Section 7.8.
                                     (i) PENTON 401(k) PLAN. The new Employee
                  Pension Benefit Plan of Penton that is a Defined Contribution
                  Plan intended to be qualified under Section 401(a) of the Code
                  and intended to meet the requirements of Section 401(k) of the
                  Code (the "PENTON 401(K) PLAN") need not include as an
                  investment option the stock of any of Pittway, Penton or
                  AptarGroup, Inc. The Penton 401(k) Plan and each corresponding
                  tax exempt trust thereunder shall accept transfers of account
                  balances of the Covered Penton Employees/Dependents from the
                  Pittway Blue Chip Plan and the trust or trusts established
                  thereunder. As soon as practicable after the date of
                  consummation of the Spinoff, but in any event not earlier than
                  the date as of which Penton submits to Pittway evidence
                  reasonably acceptable to Pittway that the Penton 401(k) Plan
                  meets the requirements of Sections 401(a), 401(k), 401(m) and
                  411(d)(6) of the Code, Pittway shall cause the trustees of the
                  trust or trusts under the Pittway Blue Chip Plan to transfer
                  to the trust or trusts established under the ▇▇▇▇▇▇ ▇▇▇(▇)
                  Plan assets equal to the account balances (including all
                  vested and unvested portions thereof) of Covered Penton
                  Employees/Dependents under the Pittway Blue Chip Plan valued
                  as of the day before the date of transfer. Such account
                  balances shall include all employee salary reduction
                  contributions, employer matching contributions and employer
                  contributions from the prior Penton profit-sharing plan
                  previously combined with the Pittway BlueChip Plan (and
                  earnings thereon, if any) made or to be made under the Pittway
                  Blue Chip Plan with respect to all periods ending on the date
                  of consummation of the Spinoff. Such transfer of account
                  balances shall be made in cash or property, or a combination
                  of cash and property, as mutually agreed upon by Pittway and
                  Penton. Each Covered Penton Employee/Dependent who, 
                                      -56-
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                  as of the date of transfer, has a loan outstanding under the
                  Pittway Blue Chip Plan shall have such loan transferred to the
                  Penton 401(k) Plan, and the ▇▇▇▇▇▇ ▇▇▇(▇) Plan shall provide
                  for such loan to continue on the same terms established under
                  the Pittway Blue Chip Plan (but in any event in accordance
                  with applicable law). Pittway shall cause the plan loan
                  provisions of the Pittway Blue Chip Plan to be timely amended
                  to provide that, effective as of the date of consummation of
                  the Spinoff, each Covered Penton Employee/Dependent with a
                  loan outstanding as of such date shall be permitted to
                  continue repayment of such loan until the earliest of the date
                  of the asset transfer contemplated in this Section 7.8(b)(i),
                  the date on which an event of default occurs with respect to
                  the loan, or the date the loan (plus all accrued interest
                  thereon) is fully repaid in accordance with its terms. From
                  the date of consummation of the Spinoff until the date of the
                  asset transfer contemplated in this Section 7.8(b)(i), Pittway
                  agrees to administer and timely pay benefits from the Pittway
                  Blue Chip Plan and the trust or trusts thereunder with respect
                  to Covered Penton Employees/Dependents to the extent that any
                  such benefits become due and payable.
                                     (ii) PENTON PENSION PLAN. The new Employee
                  Pension Benefit Plan of Penton that is a Defined Benefit Plan
                  covering Covered Penton Employees/Dependents on and
                  immediately after the date of consummation of the Spinoff
                  shall be referred to hereinafter as the "PENTON PENSION PLAN."
                  As soon as practicable after the date of consummation of the
                  Spinoff, but in any event not earlier than the date as of
                  which Penton submits to Pittway evidence reasonably acceptable
                  to Pittway that the Penton Pension Plan meets the requirements
                  of Sections 401(a) and 411(d)(6) of the Code, Pittway shall
                  cause the trustees of the trust under the Pittway Salaried
                  Plan to transfer to the trust under the Penton Pension Plan
                  assets (in cash and/or property mutually agreed upon between
                  Pittway and Penton) equal to $45,000,000 (which will exceed
                  the aggregate Accumulated Benefit Obligation (as defined in
                  Financial Accounting Standards Board Statement No. 87 ("FAS
                  87")) as of the date of consummation of the Spinoff for each
                  Covered Penton Employee/Dependent (and beneficiary of any
                  deceased such former employee, as the case may be)) plus a pro
                  rata portion, based on such amount, of the earnings (or less a
                  pro rata portion, based on such amount, of the losses) during
                  the period from January 1, 1998 to the actual date of transfer
                  on the total assets in the trust under the Pittway Salaried
                  Plan, adjusted to reflect any benefits payments made during
                  such period from the Pittway Salaried Plan and the trust
                  thereunder with respect to Covered Penton Employees/Dependents
                  pursuant to the final sentence of this Section 7.8(b)(ii) or
                  otherwise. For purposes of this Section 7.8(b)(ii), the
                  determination of such Accumulated Benefit Obligation shall be
                  based on the actuarial assumptions set forth in the 
                                      -57-
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                  most recent FAS 87 actuarial valuation for the Pittway
                  Salaried Plan. The final determination of such Accumulated
                  Benefit Obligation shall be made by agreement of Pittway and
                  Penton. If within a reasonable period of time Pittway and
                  Penton cannot agree on the determination of the amount of
                  assets to be transferred, such determination shall be made by
                  a third party mutually agreeable to Pittway and Penton, whose
                  fees and expenses shall be borne equally by Pittway and Penton
                  and whose determination shall be binding on Pittway and
                  Penton. From the date of consummation of the Spinoff until the
                  date of the asset transfer contemplated in this Section
                  7.8(b)(ii), Pittway and Penton, in accordance with past
                  practice, shall administer and cause the timely payment of
                  benefits from the Pittway Salaried Plan and the trust
                  thereunder with respect to Covered Penton Employees/Dependents
                  to the extent that any such benefits become due and payable.
                                     (iii) ADDITIONAL ASSET TRANSFER COVENANTS.
                  Notwithstanding the foregoing provisions of this Section
                  7.8(b), each transfer of assets and Liabilities provided for
                  in this section shall satisfy the requirements of Section
                  414(l) of the Code. In connection with each such transfer of
                  assets and Liabilities, Pittway and Penton agree to execute
                  such documents, to adopt such plan amendments, and to make
                  such governmental filings as may be necessary or desirable to
                  effectuate the transfer in a timely manner and in accordance
                  with applicable law.
                             (c) PENTON EMPLOYEE WELFARE BENEFIT PLANS.
         Effective as of the date of consummation of the Spinoff, Penton shall
         establish new Employee Welfare Benefit Plans that are identical in all
         material respects to the Employee Welfare Benefit Plans of Pittway that
         covered the Covered Penton Employees/Dependents on or immediately prior
         to the date of consummation of the Spinoff. Penton's Employee Welfare
         Benefit Plans shall credit toward 1998 deductible and co-payment
         requirements all deductibles and co-payments made by Covered Penton
         Employees/Dependents under Pittway's Employee Welfare Benefit Plans
         during the 1998 calendar year, including all such payments made prior
         to the date of consummation of the Spinoff.
                                     (i) PENTON 501(c)(9) TRUST. Prior to the
                  date of consummation of the Spinoff, Penton shall take all
                  steps necessary to establish the Penton 501(c)(9) Trust (which
                  shall be identical in all material respects to the Pittway
                  501(c)(9) Trust) for the purpose of funding medical plan
                  benefits for Covered Penton Employees/Dependents and Pittway
                  shall take all steps necessary to transfer to the Penton
                  501(c)(9) Trust from the Pittway 501(c)(9) Trust an
                  appropriate amount of assets equal to employee and employer
                  contributions (plus earnings, if any, thereon) in the Pittway
                  501(c)(9) Trust as of the date of transfer that are
                  attributable to Covered Penton Employees/Dependents.
                                      -58-
   65
                                     (ii) HEALTH AND DENTAL EXPENSE CLAIMS. With
                  respect to Covered Penton Employees/Dependents, Penton shall
                  assume, bear and discharge all Liabilities with respect to all
                  health and dental expense claims, whether incurred on, prior
                  to or after the date of consummation of the Spinoff and
                  whether reported on, prior to, or after such date.
                                     (iii) OTHER WELFARE BENEFIT CLAIMS. Penton
                  shall be responsible, under Employee Welfare Benefit Plans of
                  Penton that provide group universal or other life, accidental
                  death and dismemberment, business travel accident, personal
                  accident and/or long-term disability insurance, for all
                  Liabilities that arise on or after the date of consummation of
                  the Spinoff for Incidents with respect to the Covered Penton
                  Employees/Dependents (and Pittway shall not have any Liability
                  whatsoever for any of such Liabilities) and Pittway shall
                  retain all Liabilities (and Penton shall not assume any
                  Liability) under Pittway's Employee Welfare Benefit Plans that
                  provide group universal or other life, accidental death and
                  dismemberment, business travel accident, personal accident
                  and/or long-term disability insurance for Incidents occurring
                  prior to the date of consummation of the Spinoff with respect
                  to such individuals; except that Penton shall assume, bear and
                  discharge all Liabilities with respect to claims under Penton
                  Retiree Life Insurance regardless of when the related
                  Incidents occur. For purposes of the preceding sentence,
                  "Incident" includes, without limitation, injury, disability,
                  death, and accident.
                             (d) DISPUTED EMPLOYEE BENEFIT CLAIMS. With respect
         to any disputed employee benefit plan claim of any Covered Penton
         Employee/ Dependent with respect to any period ending on or prior to
         the date of consummation of the Spinoff, Penton shall have the right to
         prepare any response or defense thereto (or approve or deny approval of
         any response or defense prepared by Pittway) to the extent such claim
         is in connection with a Liability assumed by Penton pursuant to this
         Agreement.
                             (e) WORKERS' COMPENSATION CLAIMS. Penton shall be
         responsible for all Liabilities for workers' compensation claims made
         by any Covered Penton Employee/Dependent, whether made on, prior to or
         after the date of consummation of the Spinoff. From and after the
         Spinoff, Penton shall be responsible for maintaining any and all
         insurance with respect to such Liabilities and/or claims required by
         applicable law.
                             (f) PENTON 1998 STOCK AWARDS PLAN. Effective as of
         the date of consummation of the Spinoff, Penton shall establish the
         Penton 1998 Stock Awards Plan.
                                      -59-
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                             (g) ▇▇▇▇▇▇ ▇▇▇▇ DIRECTOR STOCK OPTION PLAN.
         Effective as of the date of consummation of the Spinoff, Penton shall
         establish the ▇▇▇▇▇▇ ▇▇▇▇ Director Stock Option Plan.
                             (h) PENTON SERP. Effective as of the date of
         consummation of the Spinoff, Penton shall establish a Supplemental
         Executive Retirement Plan with terms as favorable to ▇▇▇▇▇▇ ▇. ▇▇▇▇ and
         ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ as under the respective supplemental executive
         retirement plans of Pittway in which they participate pursuant to their
         existing Employment Agreements with Penton.
                             (i) COVERAGE OF SURVIVING CORPORATION'S EMPLOYEES.
         Prior to the Effective Time: (i) ▇-▇ shall take such action as is
         necessary to cause each of its employee benefit plans and programs to
         terminate immediately prior to the Effective Time and to cause any
         distributions required upon such termination pursuant to the terms of
         such plans and programs to be made promptly thereafter, it being
         understood that ▇-▇ has terminated its Employee Profit Sharing Plan as
         of December 31, 1997 and that no distributions will be made thereunder
         in respect of any profits of ▇-▇ in 1998 or thereafter; and (ii) Penton
         shall take such action as is necessary to cause the active full-time
         employees of ▇-▇ immediately prior to the Effective Time to commence
         coverage as employees of Surviving Corporation immediately after the
         Effective Time under each of Penton's then employee benefit plans and
         programs, subject to satisfaction of such requirements for eligibility
         and coverage as may be in force from time to time. For purposes of each
         of such employee benefit plans and programs of Penton, each such
         employee of the Surviving Corporation shall be credited with his or her
         years of service with ▇-▇ for eligibility, waiting period and vesting
         requirements and (except in the case of any Penton Employee Benefit
         Pension Plan) for purposes of benefit levels, and shall be credited
         with all deductibles and co-payments made by him or her under ▇-▇'s
         Employee Welfare Benefit Plans during the 1998 calendar year, including
         all such payments made prior to the Effective Time, for corresponding
         1998 deductible and co-payment requirements under Penton's Employee
         Welfare Benefit Plans, and any exclusion of a pre-existing condition
         from coverage under any medical plan or program shall be waived except
         (to the extent permitted by applicable law) to the extent such
         exclusion applies to a particular employee immediately prior to the
         Effective Time under ▇-▇'s medical plans and programs.
                  7.9 UPDATE OF DISCLOSURE LETTERS. Immediately prior to the
Effective Time, each of Penton, the ▇-▇ Shareholders and Pittway shall update
its or their respective Disclosure Letter so that, had such updated disclosures
been included in such Disclosure Letter, its or their representations in this
Agreement would be true and correct as of the Effective Time.
                  7.10 AGREEMENT REGARDING DISTRIBUTION OF PENTON COMMON ON
CERTAIN PITTWAY SHARES. ▇▇▇▇▇▇ Trust and Savings Bank, in its capacity as
successor merger 
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exchange agent in connection with the 1989 Merger Agreement (as defined below),
holds certificates representing shares of Pittway capital stock (the "UNCLAIMED
PITTWAY SHARES") for which certificates representing shares of common stock of
Pittway Corporation, a Pennsylvania corporation ("OLD PITTWAY"), have not yet
been surrendered in the manner required in connection with the merger of Old
Pittway into Pittway in December of 1989. Under the terms of the Amended and
Restated Merger Agreement and Plan of Reorganization dated as of October 11,
1989 between Pittway (then known as Standard Shares, Inc.) and Old Pittway (the
"1989 MERGER AGREEMENT"), the Unclaimed Pittway Shares are required to be held
by an exchange agent selected by Pittway until certificates representing such
shares are surrendered to such exchange agent. In the event that any Unclaimed
Pittway Shares are issued upon the surrender of such certificates, however,
Pittway is obligated under the 1989 Merger Agreement to deliver certificates
representing such Unclaimed Pittway Shares along with all dividends that have
been paid with respect thereto after the date of the merger of Old Pittway into
Pittway (including stock dividends such as the distribution of Penton Common in
the Spinoff as well as all dividends paid with respect to shares issued in any
stock dividend such as dividends that may be paid with respect to Penton Common
issued in the Spinoff). Penton Common shall be issued in the Spinoff with
respect to Unclaimed Pittway Shares outstanding as of the record date for the
Spinoff and such Penton Common shall be delivered to ▇▇▇▇▇▇ Trust and Savings
Bank, in its capacity described above. Penton agrees to treat such shares of
Penton Common as outstanding for all purposes, including the payment of
dividends (which shall be paid to ▇▇▇▇▇▇ Trust and Savings Bank in its capacity
described above).
                  7.11 AGREEMENT REGARDING TRANSITIONAL SERVICES. Pittway agrees
to provide assistance to Penton subsequent to the Effective Time in connection
with Penton's preparation of its Tax returns for periods ending on or prior to
December 31, 1998 and in connection with its other Tax matters for such periods,
as reasonably requested by Penton reasonably in advance. Pittway and Penton
shall negotiate on an arm's length basis an appropriate fee to be paid for any
such assistance so provided. In no event shall Pittway be required to provide,
nor shall it provide, assistance in any tax year (including any short tax year)
of Penton for which fees in excess of $60,000 would be payable.
                  7.12 AGREEMENT REGARDING POST-SPINOFF TAX RETURNS AND OTHER
POST-SPINOFF TAX MATTERS.
                             (a) Pittway shall include Penton and its
         Subsidiaries in Pittway's federal income Tax Returns (and any state,
         local or foreign income Tax Returns) hereafter filed by Pittway
         ("PITTWAY RETURNS") to the extent permitted by law. To the extent that
         they relate to Penton and its Subsidiaries, Pittway shall prepare such
         Pittway Returns in a manner consistent with past Pittway Returns.
         Pittway shall allow Penton an opportunity to review and comment on such
         Pittway Returns to the extent that they relate to Penton and its
         Subsidiaries. Pittway shall pay all Taxes reported on such Pittway 
         Returns and Pittway shall 
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         pay the cost of preparing such Pittway Returns (it being expressly
         understood that Pittway shall not be obligated with respect to any
         Taxes arising out of the operations of Penton and its Subsidiaries
         that for any reason whatsoever are not reported on such Pittway
         Returns).
                             (b) Pittway and Penton shall cooperate fully, as
         and to the extent reasonably requested by the other party, in
         connection with any audit, litigation or other proceeding with respect
         to Taxes. Such cooperation shall include the retention and (upon the
         other party's request) the provision of records and information which
         are reasonably relevant to any such audit, litigation or other
         proceeding and making employees available on a mutually convenient
         basis to provide additional information and explanation of any material
         provided hereunder. Pittway and Penton agree (A) to retain all books
         and records with respect to Tax matters pertinent to Penton and its
         Subsidiaries relating to any taxable period beginning before the
         consummation of the Spinoff until the expiration of the statute of
         limitations (and, to the extent notified by Pittway or Penton, any
         extensions thereof) of the respective taxable periods, and to abide by
         all record retention agreements related to such books and records
         entered into with any taxing authority, and (B) to give the other party
         reasonable written notice prior to transferring, destroying or
         discarding any such books and records and, if the other party so
         requests, to allow the other party to take possession of such books and
         records. Pittway shall promptly notify Penton upon receipt by Pittway
         of notice of any pending audits of, or assessments relating to, a
         Pittway Return which may result in a Liability of Penton or any of its
         Subsidiaries. Pittway shall consult with Penton from time to time with
         respect to any such audit or administrative or judicial proceeding to
         the extent such audit or proceeding involves a Liability of Penton or
         any of its Subsidiaries and will give Penton such information with
         respect thereto as Penton may reasonably request.
                  7.13 ▇-▇ SHAREHOLDERS NON-COMPETE, NON-SOLICITATION. Each of
the ▇-▇ Shareholders hereby acknowledges and agrees that:
                             (a) The assets of ▇-▇ include trade secrets and
         customer lists of and other confidential information concerning ▇-▇.
                             (b) During the period of three years after the
         Effective Time such ▇-▇ Shareholder shall not in any manner, directly
         or indirectly, through any person, firm or corporation, alone or as a
         member of a partnership or as an officer, director, stockholder,
         investor or employee of or in any other corporation or enterprise or
         otherwise, engage or be engaged in, or assist any other person, firm,
         corporation or enterprise in engaging or being engaged in, anywhere in
         the United States, the publishing or production of any Business
         Information Product that competes with a Business Information Product
         being published or produced by ▇-▇ immediately prior to the Effective
         Time.
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                             (c) During the period of three years following the
         Effective Time, such ▇-▇ Shareholder shall not in any manner, directly
         or indirectly, (i) induce or attempt to induce any employee of Penton,
         the Surviving Corporation or any of Penton's other Subsidiaries to quit
         or abandon his employ, or any customer of Penton, the Surviving
         Corporation or any of Penton's other Subsidiaries to quit or abandon
         its relationship, for any purpose whatsoever, or (ii) in connection
         with any business to which (b) above applies, call on, service, solicit
         or otherwise do business with any then current or prospective customer
         of Penton, the Surviving Corporation or any of Penton's other
         Subsidiaries.
                  Nothing in this Section 7.13 shall prohibit either ▇-▇
Shareholder from being: (i) a stockholder in a mutual fund or a diversified
investment company, (ii) a passive owner of not more than 5% of the outstanding
stock of any class of a corporation which is publicly traded, so long as he has
no active participation in the business of such corporation and (iii) a passive
owner of any or all of the outstanding stock of a corporation which is not
publicly traded, so long as such corporation, if it were such ▇-▇ Shareholder,
would not be in breach of the provisions of (b) and (c) above.
                  If, at the time of enforcement of this Section against a ▇-▇
Shareholder, a court holds that the restrictions stated herein are unreasonable
under circumstances then existing, such ▇-▇ Shareholder agrees that the maximum
period, scope or geographical area reasonable under such circumstances shall be
substituted for the stated period, scope or area and that the court shall be
allowed to revise the restrictions contained herein to cover the maximum period,
scope and area permitted by law.
                  Each ▇-▇ Shareholder agrees that Penton would be damaged
irreparably in the event any of the provisions of this Section 7.13 were not
performed in accordance with its specific terms or were otherwise breached and
that money damages would be an inadequate remedy for any such non-performance or
breach. Therefore, Penton or its successors or assigns shall be entitled, in
addition to other rights and remedies existing in their favor, to an injunction
or injunctions to prevent any breach or threatened breach of any of such
provisions and to enforce such provisions specifically (without posting a bond
or other security).
                  7.14 PENTON DIRECTORS. At the Effective Time, the Board of
Directors of Penton shall consist of the following eleven members: ▇▇▇▇▇▇▇ and
▇▇▇▇▇▇ (each of whom shall be elected to serve until Penton's 2000 annual
meeting), King Harris, ▇▇▇▇▇▇ ▇. ▇▇▇▇, ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ and six other members
who shall have been designated by Pittway and each of whom shall have agreed to
serve as such, to be so identified in the registration statement registering the
Spinoff under the Securities Act and to provide the information with respect to
him or her required to be included in such registration statement. At the
Effective Time, King Harris shall be non-executive Chairman of the Board of
Penton. Notwithstanding the foregoing, in the event that prior 
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to the Effective Time ▇▇▇▇▇▇ or ▇▇▇▇▇▇▇ becomes unable to serve, he shall be
replaced by another individual designated by the ▇-▇ Shareholders and reasonably
agreeable to Pittway, and in the event that prior to the Effective Time ▇▇.
▇▇▇▇▇▇, ▇▇. ▇▇▇▇ or ▇▇. ▇▇▇▇▇▇▇ becomes unable to serve, he shall be replaced by
another individual designated by Pittway. Following the Effective Time and prior
to December 31, 1999, the Board of Directors shall at no time consist of more
than fifteen members.
                  7.15 POST-EFFECTIVE TIME CASH CONTRIBUTIONS/RETURN.
                             (a) In the event that at any time during the period
         of 120 days after the Effective Time the Surviving Corporation's cash
         and cash equivalents (including for this purpose funds theretofore
         withdrawn from the Surviving Corporation by Penton, other than as
         payment for products or services provided or as repayment of funds
         provided, net of returns thereof) are insufficient to pay its
         liabilities and obligations which would then have been paid in the
         Ordinary Course of Business of ▇-▇ while maintaining a cash and cash
         equivalents balance equal to the then Unpaid Adjusted ▇-▇ Liabilities,
         without any capital contribution, loan, advance or other cash infusion
         from any other source (including without limitation from the collection
         of the Distributed ▇-▇ Accounts Receivable), the ▇-▇ Shareholders,
         jointly and severally, will immediately pay to the Surviving
         Corporation the amount of the deficit. No such payment shall create any
         interest of any ▇-▇ Shareholder in, or claim of any ▇-▇ Shareholder
         against, the Surviving Corporation nor shall any such payment be repaid
         by the Surviving Corporation, except as provided in (b) below.
                             (b) In the event that, due to estimating error, at
         each time during the period of 120 days after the Effective Time the
         Surviving Corporation's cash and cash equivalents (including for this
         purpose funds theretofore withdrawn from the Surviving Corporation by
         Penton, other than as payment for products or services provided or as
         repayment of funds provided, net of returns thereof) exceed an amount
         sufficient to pay its liabilities and obligations which would then have
         been paid in the Ordinary Course of Business of ▇-▇ while maintaining a
         cash and cash equivalents balance equal to the then Unpaid Adjusted ▇-▇
         Liabilities, without any capital contribution, loan, advance or other
         cash infusion from any other source (including without limitation from
         the collection of the Distributed ▇-▇ Accounts Receivable), the
         Surviving Corporation will return to the ▇-▇ Shareholders promptly
         following the expiration of such period, without any interest thereon,
         an amount equal to the smallest such excess.
                  7.16 POST-EFFECTIVE TIME RECEIVABLES COLLECTION. During the
period of 180 days after the Effective Time (the "COLLECTION PERIOD"), the
Surviving Corporation, as the agent of the ▇-▇ Shareholders, will use efforts to
collect the Distributed ▇-▇ Accounts Receivable comparable to those efforts the
Surviving Corporation uses to collect its own trade accounts receivable of
similar amounts and ages; provided 
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however, that the Surviving Corporation will not be required to retain or
utilize legal counsel or any collection service, or to institute legal
proceedings, as a part of its efforts to collect the Distributed ▇-▇ Accounts
Receivable.
                  If an obligor on any of the Distributed ▇-▇ Accounts
Receivable is also an obligor on one or more trade accounts receivable of the
Surviving Corporation at the time such obligor makes a payment to the Surviving
Corporation to be applied toward such obligor's trade accounts payable, such
payment will be applied as indicated by such obligor. It is understood that an
obligor may indicate an application of an amount paid by it toward its accounts
payable either expressly by reference to a particular invoice or implicitly
because the amount paid corresponds to one or more of such accounts payable. It
is further understood that an express indication regarding the application of a
payment may arise subsequent to the Surviving Corporation's receipt of such
payment, as it will be the Surviving Corporation's practice to request direction
from obligors on its accounts receivable (and the Distributed ▇-▇ Accounts
Receivable) in the event payments on such obligors' accounts payable are not
accompanied by express directions regarding the application thereof.
                  Within 5 business days after the end of each calendar month
included in the Collection Period, and within 5 business days after the end of
the Collection Period, the Surviving Corporation will pay to the ▇-▇
Shareholders an amount equal to the amounts received by the Surviving
Corporation in good funds as of the end of such calendar month or the end of the
Collection Period, as the case may be, from its collection of the Distributed
▇-▇ Accounts Receivable which the Surviving Corporation has not theretofore paid
to the ▇-▇ Shareholders.
                  Subsequent to the Collection Period, if either the Surviving
Corporation or the ▇-▇ Shareholders receives a payment on a receivable owned by
the other, it or they will promptly forward such payment to the owner.
                                    ARTICLE 8
                                   CONDITIONS
                  8.1 CONDITIONS TO OBLIGATIONS OF EACH PARTY. The respective
obligations of Penton, Combination Subsidiary, ▇-▇ and the ▇-▇ Shareholders to
effect the Merger shall be subject to the condition that the Spinoff shall have
been consummated at or prior to the Effective Time. The respective obligations
of Penton, Combination Subsidiary, ▇-▇ and the ▇-▇ Shareholders to effect the
Merger shall also be subject to, and the obligation of Pittway to effect the
Spinoff shall be subject to, the fulfillment at or prior to the Effective Time
of the following conditions:
                             (a) all applicable waiting periods (and any
         extensions thereof) under the ▇▇▇▇-▇▇▇▇▇-▇▇▇▇▇▇ Act shall have expired;
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                             (b) all Governmental Actions (other than routine
         qualifications to do business intended to be obtained as needed)
         required to be taken, given or obtained that are necessary in
         connection with the transactions contemplated by this Agreement shall
         (i) have been taken, given or obtained, (ii) be in full force and
         effect as of the Effective Time and (iii) not be subject to any pending
         proceedings or appeals, administrative, judicial or otherwise (and the
         time for appeal with respect to any Governmental Action shall have
         expired, or, if an appeal shall have been taken, it shall have been
         dismissed);
                             (c) there shall not be threatened, instituted or
         pending any action or proceeding before any court or Governmental
         Authority, whether within or outside the United States, (i) challenging
         or seeking to make illegal, or to delay or otherwise directly or
         indirectly to restrain or prohibit, the consummation of the Spinoff or
         the Merger, or seeking to obtain material damages in connection with
         the Spinoff or the Merger, (ii) seeking to prohibit direct or indirect
         ownership or operation by Penton of all or a material portion of the
         business or assets of ▇-▇, or to compel Penton or any of its
         Subsidiaries to dispose of or to hold separately all or a material
         portion of the business or assets thereof, (iii) seeking to impose or
         confirm limitations on the ability of Penton effectively to exercise
         directly or indirectly full rights of ownership of the shares of
         capital stock of the Surviving Corporation or any of its other
         Subsidiaries, including without limitation the right to vote such
         shares on all matters properly presented to the shareholders of any
         such company, (iv) seeking to require direct or indirect divestiture by
         Penton of any shares of capital stock of the Surviving Corporation or
         any of its other Subsidiaries, (v) seeking or causing any material
         diminution in the direct or indirect benefits expected to be derived by
         Penton or the ▇-▇ Shareholders as a result of the transactions
         contemplated by this Agreement, (vi) invalidating or rendering
         unenforceable any material provision of this Agreement (including
         without limitation any of the exhibits or attachments hereto), (vii)
         which otherwise is reasonably likely to have a Material Adverse Effect
         on Penton or the Surviving Corporation, or (viii) otherwise relating in
         any material respect to the Spinoff or the Merger;
                             (d) there shall not be any action taken, or any
         statute, rule, regulation, judgment, order or injunction proposed,
         enacted, entered, enforced, promulgated, issued or deemed applicable to
         the Spinoff or the Merger by any Governmental Authority which is
         reasonably likely to, directly or indirectly, result in any of the
         consequences referred to in (c) above;
                             (e) Penton shall have entered into credit
         arrangements sufficient to enable it to repay at the time of the
         Spinoff its then outstanding indebtedness to Pittway and to provide it
         with sufficient working capital for its foreseeable post-Spinoff needs
         taking into account the provisions of this Agreement;
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                             (f) there shall not have occurred and be continuing
         (i) any general suspension of, or limitation on prices for, trading in
         securities on the New York Stock Exchange or on the National
         Association of Securities Dealers Automated Quotation System, National
         Markets System, or in the United States over-the-counter market, or
         (ii) any action by any Governmental Authority which would limit or
         adversely affect the extension of credit to Penton pursuant to the
         credit arrangements referred to in (e) above;
                             (g) the Penton Common shall have been registered
         under the Exchange Act pursuant to a registration statement of Penton
         and such registration statement shall have become effective and shall
         not be subject to any stop order and no stop order proceeding with
         respect thereto shall have been initiated or threatened by the
         Commission;
                             (h) if necessary, the Penton Common to be issued to
         the ▇-▇ Shareholders pursuant to this Agreement shall have been
         registered under all applicable United States state securities or blue
         sky laws;
                             (i) a registration statement of Penton registering
         the Spinoff under the Securities Act shall have become effective and
         shall not be subject to any stop order and no stop order proceeding
         with respect thereto shall have been initiated or threatened by the
         Commission;
                             (j) the Penton Common to be issued in the Spinoff
         and to be issued or contingently issued to the ▇-▇ Shareholders
         pursuant to this Agreement shall have been approved for listing on the
         New York Stock Exchange, or for trading on the National Association of
         Securities Dealers Automated Quotation System, National Market System,
         upon official notice of issuance;
                             (k) Pittway shall not have been notified by the IRS
         that the Ruling has been withdrawn, invalidated or modified in any way
         adverse to Pittway or its stockholders; and Pittway shall not have
         determined in good faith that the representations and assumptions
         underlying the Ruling are untrue or incorrect in any material respect;
                             (l) Pittway, and Penton and each of its
         Subsidiaries, shall have obtained each consent and approval necessary
         in order that the Spinoff and the Merger not constitute a breach or
         violation of, or result in a right of termination or acceleration or
         any encumbrance on the stock or assets of Penton or any of its
         Subsidiaries pursuant to the provisions of, any agreement, arrangement,
         understanding, license, franchise or permit to which any of them is a
         party or by which any of them is bound, which individually or in the
         aggregate would be material;
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                             (m) ▇-▇ shall have obtained each consent and
         approval necessary in order that the Merger not constitute a breach or
         violation of, or result in a right of termination or acceleration or
         any encumbrance on the stock or assets of the Surviving Corporation
         pursuant to the provisions of, any agreement, arrangement,
         understanding, license, franchise or permit to which ▇-▇ is a party or
         by which it is bound, which individually or in the aggregate would be
         material;
                             (n) except as contemplated in Sections 2.4(d) and
         7.14, each person who is a director, officer or employee of Pittway or
         any Post-Spinoff Pittway Subsidiary shall have resigned from each
         office and directorship held by him at Penton and its Subsidiaries;
                             (o) at the Closing, ▇▇▇▇▇▇▇ and ▇▇▇▇▇▇, and ▇▇▇▇▇▇
         and Penton, shall have entered into Employment Agreements in the forms
         of EXHIBIT E and EXHIBIT F, respectively (the "EMPLOYMENT AGREEMENTS");
         and
                             (p) no party hereto shall have terminated this
         Agreement as permitted herein.
                  8.2 ADDITIONAL CONDITIONS TO OBLIGATIONS OF ▇-▇ AND THE ▇-▇
SHAREHOLDERS. The obligations of ▇-▇ and the ▇-▇ Shareholders to effect the
Merger are also subject to the following conditions:
                             (a) except as contemplated by this Agreement, the
         representations and warranties of Penton in Article 3 shall be true and
         correct in all material respects as of the Effective Time as if made at
         and as of the Effective Time (without giving effect to any updating
         disclosures made by Penton pursuant to Section 7.9), and each of
         Pittway, Penton and Combination Subsidiary shall in all material
         respects have performed each obligation and agreement and complied with
         each covenant to be performed and complied with by it hereunder at or
         prior to the Effective Time;
                             (b) the ▇-▇ Shareholders shall not have discovered
         any Undisclosed Penton Matter, and there shall not have occurred any
         Adverse Penton Change, the effect of which, individually or in the
         aggregate, is materially adverse to the value of Penton and its
         Subsidiaries taken as a whole compared to the value of Penton and its
         Subsidiaries reflected in the Penton Financial Statements;
                             (c) Penton shall have furnished to the ▇-▇
         Shareholders a certificate in which Penton shall certify that an
         appropriate inquiry has been made of the executive officers of Penton
         and its Subsidiaries having principal responsibilities for the matters
         as to which representations and warranties have been made by Penton in
         this Agreement and for the performance of the 
                                      -68-
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         covenants of Penton set forth in this Agreement, and that after 
         completion of such inquiry, Penton has no reason to believe that the 
         conditions set forth in Sections 8.2(a) and (b) have not been 
         fulfilled;
                             (d) Penton shall have furnished to the ▇-▇
         Shareholders (i) copies of the text of the resolutions by which the
         corporate action on the part of Penton necessary to approve this
         Agreement and the Merger was taken, (ii) certificates executed on
         behalf of Penton and Combination Subsidiary by their respective
         corporate secretaries or one of their respective assistant corporate
         secretaries certifying to the ▇-▇ Shareholders that such copies are
         true, correct and complete copies of such resolutions and that such
         resolutions were duly adopted and have not been amended or rescinded,
         and (iii) incumbency certificates executed on behalf of Penton and
         Combination Subsidiary by their respective corporate secretaries or one
         of their respective assistant corporate secretaries certifying the
         signature and office of each officer thereof executing this Agreement
         or any other agreement, certificate or other instrument executed
         pursuant hereto;
                             (e) the Certificate of Incorporation and By-Laws of
         Penton shall have been amended and restated to read as set forth in
         EXHIBITS C AND D attached hereto;
                             (f) the ▇-▇ Shareholders shall have received a
         letter addressed to them from ▇▇▇▇▇, Day, ▇▇▇▇▇▇ & ▇▇▇▇▇, ongoing
         counsel to Penton, or as to certain of the matters in (vii) below from
         local counsel to Penton, dated the date of the Closing, based on
         customary reliance and subject to customary qualifications, to the
         effect that:
                                     (i) Penton is a corporation existing and in
                  good standing under the laws of the State of Delaware and is
                  duly qualified to conduct business as a foreign corporation in
                  the State of Ohio.
                                     (ii) Combination Subsidiary is a
                  corporation existing and in good standing under the laws of
                  the State of Illinois.
                                     (iii) Each of Penton and Combination
                  Subsidiary has the corporate power to consummate the
                  transactions on its part contemplated by this Agreement. Each
                  of Penton and Combination Subsidiary has duly taken all
                  requisite corporate action to authorize this Agreement and
                  such transactions; and this Agreement and the Employment
                  Agreements, insofar as they purport to obligate Penton or
                  Combination Subsidiary to the ▇-▇ Shareholders, have been duly
                  executed and delivered by Penton and Combination Subsidiary
                  and constitute the valid, binding and enforceable obligations
                  of Penton or Combination Subsidiary.
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                                     (iv) The authorized capital of Penton
                  consists of 60,000,000 shares of capital stock designated
                  "Common Stock," of which the number of shares indicated in
                  such letter (including shares transferred in the Spinoff) are
                  outstanding, and 2,000,000 shares of capital stock designated
                  "Preferred Stock," none of which are outstanding, all of which
                  outstanding shares of Common Stock were duly and validly
                  issued and are fully paid and non-assessable (for purposes of
                  which such counsel may rely upon a certificate of the
                  Secretary of Pittway as to the number of shares of Pittway
                  stock outstanding immediately prior to the consummation of the
                  Spinoff and may assume that such shares are duly and validly
                  issued and fully paid and non-assessable).
                                     (v) The registration statement pursuant to
                  which the Penton Common is registered under the Exchange Act
                  has become effective under the Exchange Act and to such
                  counsel's knowledge no stop order suspending its effectiveness
                  has been issued and no proceedings for that purpose are
                  pending before or are contemplated by the Commission.
                                     (vi) The Penton Common to be issued or
                  contingently issued to the ▇-▇ Shareholders pursuant to this
                  Agreement has been duly authorized and will, at the time of
                  its issuance pursuant to this Agreement, be validly issued,
                  fully paid and nonassessable.
                                     (vii) Penton wholly owns, directly or
                  indirectly, all of the outstanding capital stock of each of
                  its Subsidiaries; and
                             (g) each of the conditions set forth in Sections
         8.3(e), (f) and (h) shall have been satisfied (without giving effect to
         any waiver by Penton).
                  8.3 ADDITIONAL CONDITIONS TO OBLIGATIONS OF PENTON AND
COMBINATION SUBSIDIARY. The obligations of Penton and Combination Subsidiary to
effect the Merger are also subject to the following conditions:
                             (a) except as contemplated by this Agreement, the
         representations and warranties of the ▇-▇ Shareholders in Article 4
         shall be true and correct in all material respects as of the Effective
         Time as if made at and as of the Effective Time (without giving effect
         to any updating disclosures made by the ▇-▇ Shareholders pursuant to
         Section 7.9), the representations and warranties of Pittway in Article
         5 shall be true and correct in all material respects as of the
         Effective Time as if made at and as of the Effective Time (without
         giving effect to any updating disclosures made by Pittway pursuant to
         Section 7.9), and ▇-▇, the ▇-▇ Shareholders and Pittway shall in all
         material respects have performed each obligation and agreement of it,
         them and it, respectively, and
                                      -70-
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         complied with each covenant to be performed and complied with by it,
         them and it, respectively, hereunder at or prior to the Effective Time;
                             (b) Penton shall not have discovered any
         Undisclosed ▇-▇ Matter, and there shall not have occurred any Adverse
         ▇-▇ Change, the effect of which, individually or in the aggregate, is
         materially adverse to the value of ▇-▇ compared to the value of ▇-▇
         reflected on the ▇-▇ Financial Statements;
                             (c) the ▇-▇ Shareholders shall have furnished to
         Penton a certificate in which each of the ▇-▇ Shareholders shall
         certify that an appropriate inquiry has been made of the executive
         officers of ▇-▇ having principal responsibilities for the matters as to
         which representations and warranties related to ▇-▇ have been made by
         the ▇-▇ Shareholders in this Agreement and for the performance of the
         covenants of ▇-▇ and the ▇-▇ Shareholders related to ▇-▇ set forth in
         this Agreement, and that after completion of such inquiry, neither of
         the ▇-▇ Shareholders has any reason to believe that the conditions
         relating to the representations and warranties of the ▇-▇ Shareholders
         and such performance set forth in Section 8.3(a) and the condition set
         forth in Section 8.3(b) have not been fulfilled;
                             (d) the ▇-▇ Shareholders shall have furnished to
         Penton (i) copies of the text of the resolutions by which the corporate
         action on the part of ▇-▇ necessary to approve the Merger was taken,
         (ii) a certificate executed on behalf of ▇-▇ by its corporate secretary
         or one of its assistant corporate secretaries certifying to Penton that
         such copy is a true, correct and complete copy of such resolutions and
         that such resolutions were duly adopted and have not been amended or
         rescinded, and (iii) an incumbency certificate executed on behalf of
         ▇-▇ by its corporate secretary or one of its assistant corporate
         secretaries certifying the signature and office of each officer of ▇-▇
         executing any agreement, certificate or other instrument executed
         pursuant hereto;
                             (e) Pittway shall have furnished to Penton a
         certificate in which Pittway shall certify that an appropriate inquiry
         has been made of the executive officers of Pittway having principal
         responsibilities for the matters as to which representations and
         warranties have been made by Pittway in this Agreement and for the
         performance of the covenants of Pittway set forth in this Agreement,
         and that after completion of such inquiry, Pittway has no reason to
         believe that the conditions relating to such representations and
         warranties and such performance set forth in Section 8.3(a) have not
         been fulfilled;
                             (f) Pittway shall have furnished to Penton (i)
         copies of the text of the resolutions by which the corporate action on
         the part of Pittway necessary to approve this Agreement and the Spinoff
         was taken, (ii) a certificate executed on behalf of Pittway by its
         corporate secretary or one of its assistant corporate secretaries
         certifying to Penton that such copy is a true, correct and complete
                                      -71-
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         copy of such resolutions and that such resolutions were duly adopted
         and have not been amended or rescinded, and (iii) an incumbency
         certificate executed on behalf of Pittway by its corporate secretary or
         one of its assistant corporate secretaries certifying the signature and
         office of each officer of Pittway executing this Agreement or any other
         agreement, certificate or other instrument executed pursuant hereto;
                             (g) Penton shall have received a letter addressed
         to it from Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ (Illinois), counsel for
         ▇-▇ and the ▇-▇ Shareholders, dated the date of the Closing, based on
         customary reliance and subject to customary qualifications, to the
         effect that:
                                     (i) ▇-▇ is a corporation existing and in
                  good standing under the laws of the State of Illinois.
                                     (ii) ▇-▇ has the corporate power to
                  consummate the transactions on its part contemplated by this
                  Agreement. ▇-▇ has duly taken all requisite corporate action
                  to authorize this Agreement; and this Agreement, insofar as it
                  purports to obligate ▇-▇ to ▇▇▇▇▇▇, has been duly executed and
                  delivered by ▇-▇ and constitutes the valid, binding and
                  enforceable obligation of ▇-▇.
                                     (iii) The authorized capital of ▇-▇
                  consists of 700 shares of ▇-▇ Common Stock, 300 shares of
                  Common Stock - Series B, without par value, and 200 shares of
                  Preferred Stock, without par value, of which 700 shares of ▇-▇
                  Common Stock are outstanding, all of which outstanding shares
                  were validly issued and are fully paid and non-assessable.
                                     (iv) This Agreement, insofar as it purports
                  to obligate the ▇-▇ Shareholders to Penton, has been duly
                  executed and delivered by each of the ▇-▇ Shareholders and
                  constitutes a valid, binding and enforceable obligation of
                  each of them.
                                     (v) The ▇-▇ Shareholders own of record all
                  of the outstanding capital stock of ▇-▇, as follows: ▇▇▇▇▇▇▇ -
                  350 shares of ▇-▇ Common Stock; ▇▇▇▇▇▇ - 350 shares of ▇-▇
                  Common Stock;
                                      -72-
   79
                             (h) Penton shall have received a letter addressed
         to it from ▇▇▇▇▇▇▇▇ & ▇▇▇▇▇, counsel for Pittway, dated the date of the
         Closing, based on customary reliance and subject to customary
         qualifications, to the effect that:
                                     (i) Pittway is a corporation existing and
                  in good standing under the laws of the State of Delaware and
                  is duly qualified to conduct business as a foreign corporation
                  in the State of Illinois.
                                     (ii) Pittway has duly taken all requisite
                  corporate action to authorize this Agreement; and this
                  Agreement has been duly executed and delivered by Pittway and,
                  insofar as this Agreement purports to obligate Pittway to
                  Penton, constitutes the valid, binding and enforceable
                  obligation of Pittway; and
                             (i) ▇-▇'s cash and cash equivalents shall be in an
         amount sufficient, in the good faith estimate of the ▇-▇ Shareholders,
         to enable the Surviving Corporation to pay its liabilities and
         obligations as and when they would be paid in the Ordinary Course of
         Business of ▇-▇ at all times during the period of 120 days after the
         Effective Time while maintaining at all times during such period a cash
         and cash equivalents balance equal to the Unpaid Adjusted ▇-▇
         Liabilities, without any capital contribution, loan, advance or other
         cash infusion from any other source (including without limitation from
         the collection of the Distributed ▇-▇ Accounts Receivable).
                  8.4 ADDITIONAL CONDITIONS TO OBLIGATION OF PITTWAY. The
obligation of Pittway to effect the Spinoff is also subject to the following
conditions:
                             (a) Penton, Combination Subsidiary, ▇-▇ and the ▇-▇
         Shareholders shall in all material respects have performed each
         obligation and agreement and complied with each covenant to be
         performed and complied with by it or them hereunder at or prior to the
         Spinoff;
                             (b) Penton shall have furnished to Pittway a
         certificate in which Penton shall certify that an appropriate inquiry
         has been made of the executive officers of Penton and Combination
         Subsidiary having principal responsibilities for the performance of the
         covenants of Penton and Combination Subsidiary set forth in this
         Agreement, and that after completion of such inquiry, Penton has no
         reason to believe that the condition relating to Penton and Combination
         Subsidiary set forth in Section 8.4(a) has not been fulfilled;
                             (c) the ▇-▇ Shareholders shall have furnished to
         Pittway a certificate in which each of the ▇-▇ Shareholders shall
         certify that an appropriate inquiry has been made of the executive
         officers of ▇-▇ having principal responsibilities for the performance
         of the covenants of ▇-▇ and of the 
                                      -73-
   80
         ▇-▇ Shareholders related to ▇-▇ set forth in this Agreement, and that
         after completion of such inquiry, neither of the ▇-▇ Shareholders has
         any reason to believe that the condition relating to ▇-▇ and the ▇-▇
         Shareholders set forth in Section 8.4(a) has not been fulfilled;
                             (d) Penton shall have furnished to Pittway (i) a
         copy of the text of the resolutions by which the corporate action on
         the part of Penton and Combination Subsidiary necessary to approve this
         Agreement was taken, (ii) a certificate executed on behalf of Penton
         and Combination Subsidiary by their respective corporate secretaries or
         one of their respective assistant corporate secretaries certifying to
         Pittway that such copy is a true, correct and complete copy of such
         resolutions and that such resolutions were duly adopted and have not
         been amended or rescinded, and (iii) an incumbency certificate executed
         on behalf of Penton and Combination Subsidiary by their respective
         corporate secretaries or one of their respective assistant corporate
         secretaries certifying the signature and office of each officer of
         Penton or Combination Subsidiary executing this Agreement or any other
         agreement, certificate or other instrument executed pursuant hereto;
                             (e) Pittway shall have received a letter addressed
         to it from ▇▇▇▇▇, Day, ▇▇▇▇▇▇ & ▇▇▇▇▇, ongoing counsel for Penton,
         dated the date of the Closing, based on customary reliance and subject
         to customary qualifications, to the effect that:
                                     (i) Penton is a corporation existing and in
                  good standing under the laws of the State of Delaware and is
                  duly qualified to conduct business as a foreign corporation in
                  the State of Ohio.
                                     (ii) Penton has duly taken all requisite
                  corporate action to authorize this Agreement; and this
                  Agreement has been duly executed and delivered by Penton and,
                  insofar as this Agreement purports to obligate Penton to
                  Pittway, constitutes the valid, binding and enforceable
                  obligation of Penton;
                             (f) Pittway shall have received a letter addressed
         to it from Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ (Illinois), counsel for
         ▇-▇ and the ▇-▇ Shareholders, dated the date of the Closing, based on
         customary reliance and subject to customary qualifications, to the
         effect that this Agreement has been duly executed and delivered by each
         of the ▇-▇ Shareholders and, insofar as this Agreement purports to
         obligate the ▇-▇ Shareholders to Pittway, constitutes a valid, binding
         and enforceable obligation of each of them;
                             (g) ▇▇▇▇▇▇ ▇. ▇▇▇▇ and ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ shall each
         have resigned as an officer of Pittway and of any Post-Spinoff Pittway
         Subsidiaries;
                                      -74-
   81
                             (h) ▇▇▇▇▇▇ ▇. ▇▇▇▇ and ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ shall have
         released Pittway from all obligations under the respective Employment
         Agreements in effect on the date hereof between them and Penton,
         including without limitation all obligations under the supplemental
         executive retirement plans provided for therein; and
                             (i) Penton shall have repaid its indebtedness to
         Pittway outstanding immediately prior to the time of the Spinoff.
                                    ARTICLE 9
                        TERMINATION, AMENDMENT AND WAIVER
                  9.1 TERMINATION. This Agreement may be terminated at any time
prior to the Effective Time:
                             (a) by mutual consent of a duly authorized officer
         of Penton, the ▇-▇ Shareholders and a duly authorized officer of
         Pittway; or
                             (b) by Penton, the ▇-▇ Shareholders or Pittway if
         the Merger shall not have been consummated by August 31, 1998;
         provided, however, that no Party shall have the right to terminate this
         Agreement unilaterally if the event giving rise to such right shall be
         primarily attributable to such Party or to any Affiliate of such Party.
                  9.2 EFFECT OF TERMINATION. In the event of termination of this
Agreement, this Agreement shall become void and there shall be no liability or
further obligation hereunder on the part of any Party or any Party's
stockholders, officers or directors, except as set forth in Section 7.6 and the
second to last paragraph of Section 7.1 and except that:
                                     (i) in the event Pittway declines to effect
                  the Spinoff for any reason other than the exercise of its
                  rights under Sections 8.1, 8.4 and 9.1, or in the event Penton
                  or Combination Subsidiary declines to effect the Merger for
                  any reason other than the exercise of its rights under
                  Sections 8.1, 8.3 and 9.1, Pittway shall reimburse the ▇-▇
                  Shareholders for their damages resulting therefrom (including
                  but not limited to $250,000 plus all reasonable legal and
                  other costs and expenses incurred by the ▇-▇ Shareholders in
                  connection with this Agreement and the transactions
                  contemplated hereby); and
                                     (ii) in the event either ▇-▇ Shareholder or
                  ▇-▇ declines to effect the Merger for any reason other than
                  the exercise of his or its rights under Sections 8.1, 8.2 and
                  9.1, the ▇-▇ Shareholders shall 
                                      -75-
   82
                  reimburse Pittway, Penton and Combination Subsidiary for their
                  damages resulting therefrom (including but not limited to all
                  reasonable legal and other costs and expenses incurred by them
                  in connection with this Agreement and the transactions
                  contemplated hereby); and
                                     (iii) in the event any Party terminates
                  this Agreement pursuant to Section 9.1(b) on account of
                  non-satisfaction of a condition set forth in Section
                  8.1(e),(i) or (j) or the first clause of Section 8.1(k),
                  Penton shall reimburse the ▇-▇ Shareholders for all reasonable
                  legal and other costs and expenses incurred by the ▇-▇
                  Shareholders in connection with this Agreement and the
                  transactions contemplated hereby.
                  9.3 AMENDMENT. This Agreement may not be amended except by an
instrument in writing signed by or on behalf of each of the Parties.
                  9.4 WAIVER. At any time prior to the Effective Time, Penton
may (a) extend the time for the performance of any of the obligations or other
acts of Pittway, D-M or any ▇-▇ Shareholder or (b) waive compliance with any of
the agreements of Pittway, D-M or any ▇-▇ Shareholder or with any conditions to
the obligations of Penton, in each case only to the extent such obligations,
agreements and conditions are intended for the benefit of Penton. At any time
prior to the Effective Time, the ▇-▇ Shareholders may (a) extend the time for
the performance of any of the obligations or other acts of Pittway, Penton or
Combination Subsidiary or (b) waive compliance with any of the agreements of
Pittway, Penton or Combination Subsidiary or with any conditions to the
obligations of ▇-▇ and the ▇-▇ Shareholders, in each case only to the extent
such obligations, agreements and conditions are intended for the benefit of ▇-▇
and the ▇-▇ Shareholders. At any time prior to the Effective Time, Pittway may
(a) extend the time for the performance of any of the obligations or other acts
of Penton, Combination Subsidiary, ▇-▇ or either ▇-▇ Shareholder or (b) waive
compliance with any of the agreements of Penton, Combination Subsidiary, ▇-▇ or
either ▇-▇ Shareholder or with any conditions to the obligations of Pittway, in
each case only to the extent such obligations, agreements and conditions are
intended for the benefit of Pittway.
                                   ARTICLE 10
                               GENERAL PROVISIONS
                  10.1 SURVIVAL OF REPRESENTATIONS AND WARRANTIES. Each of the
representations and warranties of Penton contained in Article 3 and of Pittway
contained in Article 5 shall survive the consummation of the Spinoff and the
Merger (even if the Party or any of the Parties to which or to whom such
representation or warranty is made knew or had reason to know of any
misrepresentation or breach of 
                                      -76-
   83
warranty at the Effective Time) and shall continue in full force and effect
until the third anniversary of the Effective Time; and each of the
representations and warranties of the ▇-▇ Shareholders contained in Article 4
shall survive the consummation of the Spinoff and the Merger (even if the Party
or any of the Parties to which or to whom such representation or warranty is
made knew or had reason to know of any misrepresentation or breach of warranty
at the Effective Time) and shall continue in full force and effect until the
20th day after the conclusion of the Second Reference Period (or, if such day is
not a business day, the first business day thereafter); in each case, other than
any representation and warranty relating to Taxes, each of which shall to the
extent it relates to Taxes continue in full force and effect until 30 days after
the applicable statute of limitations has expired.
                  10.2 PUBLIC STATEMENTS. Except as required by applicable law
(including, without limitation, in any Schedule 13D of any ▇-▇ Shareholder, or
amendment thereto, required by applicable law), no Party shall make or permit
any Affiliate of such Party to make any public announcement or statement with
respect to this Agreement, the Spinoff, the Merger or any of the other
transactions contemplated herein without the approval of each other Party (for
purposes of which, any approval given by the ▇-▇ Shareholders shall be deemed
also given by ▇-▇ and any approval given by Penton shall be deemed also given by
Combination Subsidiary), which approval will not be unreasonably withheld or
delayed. It is expressly understood, however, that the Parties will issue a
mutually agreed upon press release promptly following the execution and delivery
of this Agreement and that Pittway shall have the right to make and permit
public announcements and statements with respect to the Spinoff and the Merger
without the approval of any other Party.
                  10.3 DESIGNATION OF ▇-▇ SHAREHOLDERS AS REPRESENTATIVE. ▇-▇
hereby designates the ▇-▇ Shareholders as its representative for all purposes
under this Agreement, including without limitation the receipt of disclosures,
the granting of all consents and waivers by ▇-▇ under this Agreement and the
receiving of all notices given to ▇-▇ pursuant to this Agreement.
                  10.4 NOTICES. All notices and other communications hereunder
shall be given to each of the Parties in all cases, shall be in writing, and
shall be sufficiently given if made by hand delivery, by reputable express
courier service (charges prepaid), by telecopier, or by registered or certified
mail (postage prepaid and return receipt requested) to the Parties at the
following addresses (or at such other address for a Party as shall be specified
to the other Parties by it by like notice):
            if to Penton, Combination Subsidiary or the Surviving Corporation:
                    ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇
                    ▇▇▇▇▇▇▇▇▇, ▇▇  ▇▇▇▇▇
                    Attention:  ▇▇▇▇▇▇ ▇. ▇▇▇▇
                                      -77-
   84
                  with a copy to:
                             ▇▇▇▇▇, Day, ▇▇▇▇▇▇ & ▇▇▇▇▇
                             Northpoint
                             ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇
                             ▇▇▇▇▇▇▇▇▇, ▇▇▇▇  ▇▇▇▇▇
                             Attention: ▇▇▇▇▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇
                  if to Pittway:
                             ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇
                             ▇▇▇▇▇ ▇▇▇
                             ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇  ▇▇▇▇▇-▇▇▇▇
                             Attention:  King Harris
                  with a copy to:
                             ▇▇▇▇▇▇▇▇ & ▇▇▇▇▇
                             ▇▇▇ ▇. ▇▇▇▇▇▇▇▇ ▇▇▇▇▇
                             ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇
                             Attention: ▇▇▇▇▇ ▇. ▇▇▇▇▇
                  if to ▇-▇ or the ▇-▇ Shareholders prior to the Effective Time
or to the ▇-▇ Shareholders after the Effective Time:
                             ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇
                             ▇▇▇▇▇ ▇▇▇
                             ▇▇▇ ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇
                  with a copy to:
                             Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ (Illinois)
                             ▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇▇▇▇
                             ▇▇▇▇▇ ▇▇▇▇
                             ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇
                             Attention: ▇▇▇▇▇ ▇. ▇▇▇▇
                  All such notices and other communications shall be deemed to
have been duly given: when delivered by hand, if personally delivered; three
business day after being deposited with a reputable express courier service
(charges prepaid); five business days after being deposited in the mail, postage
prepaid, if delivered by mail; when answered back, if telexed; and when receipt
acknowledged (by a telecopy machine or otherwise), if telecopied.
                                      -78-
   85
                  10.5 INTERPRETATION. The headings contained in this Agreement
are for reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement. References to Sections and Articles refer to
sections and articles of this Agreement unless otherwise stated. Words such as
"herein", "hereinafter", "hereof", "hereto", "hereby" and "hereunder", and words
of like import, unless the context requires otherwise, refer to this Agreement
(including the exhibits and attachments hereto). As used in this Agreement, the
masculine, feminine and neuter genders shall be deemed to include the others if
the context requires and the singular shall include the plural and the plural
the singular if the context requires.
                  10.6 SEVERABILITY. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction to be
invalid, void or unenforceable, the remainder of the terms, provisions,
covenants and restrictions of this Agreement shall remain in full force and
effect and shall in no way be affected, impaired or invalidated and the Parties
shall negotiate in good faith to modify this Agreement to preserve each Party's
anticipated benefits under this Agreement.
                  10.7 DISPUTES.
                             (a) In the event any dispute between or among any
         Parties shall arise relating to this Agreement or the transactions
         contemplated hereby, such Parties shall use their reasonable good faith
         efforts to resolve such dispute. At the request of any such Party, the
         other Party or Parties to the dispute shall provide such Party with
         written notice describing in reasonable detail the nature of such
         dispute and such other Party's or Parties' proposed resolution of such
         dispute. If and to the extent that such dispute is not resolved to the
         mutual satisfaction of all Parties thereto within 45 days of the
         delivery of such notice, the Parties thereto agree to resolve such
         dispute pursuant to Section 10.7(b).
                             (b) Any Party may submit to arbitration any
         disputed matter which may arise relating to this Agreement or the
         transactions contemplated hereby which remains unresolved after the
         Parties to such dispute have fulfilled their obligations under Section 
         10.7(a). The arbitration procedure set forth in this Section 10.7(b)
         shall be the sole and exclusive method for resolving any such
         remaining disputed matter and no Party to such dispute shall commence
         any litigation on the basis of any such remaining disputed matter
         except litigation to enforce a decision made by the arbitrators
         selected in accordance with this Section 10.7(b). In each case in
         which it shall become necessary to resort to arbitration, the Party or
         Parties desiring arbitration of a disputed matter (the "CLAIMANT(S)")
         shall give written notice to that effect to the other Party or Parties
         to such dispute (the "RESPONDENT(S)"), specifying in such notice the
         name and address of the person designated to act as arbitrator on
         behalf of the Claimant(s), which arbitrator shall be a competent and
         impartial person. Within ten (10) days after its or their receipt of
         such notice, the Respondent(s) shall
                                      -79-
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         give written notice to the Claimant(s) specifying the name and address
         of the person designated to act as arbitrator on behalf of the
         Respondent(s), which arbitrator shall be a competent and impartial
         person. If the Respondent(s) fail to notify the Claimant(s) of the
         person designated to act as arbitrator on behalf of the Respondent(s),
         as aforesaid, within the time above specified, then the appointment of
         the second arbitrator shall be made in the same manner as hereinafter
         provided for the appointment of a third arbitrator in a case where the
         two arbitrators appointed hereunder are unable to agree upon such
         appointment. The arbitrators so chosen shall   meet within ten (10)
         days after the second arbitrator is appointed and if, within thirty
         (30) days after the second arbitrator is appointed, such two
         arbitrators shall not agree upon the resolution of the matter in
         dispute, they shall themselves appoint a third arbitrator, who shall
         be a competent and impartial person. In the event such two arbitrators
         are unable to agree upon such appointment within ten (10) days after
         the time aforesaid, then either the Claimant(s) or the Respondent(s),
         on behalf of both the Claimant(s) and the Respondent(s), may request
         such appointment by the American Arbitration Association in accordance
         with its rules then prevailing or in the event of the failure for ten
         (10) days, refusal or inability of the American Arbitration
         Association to appoint said third arbitrator, then either the
         Claimant(s) or the Respondent(s) may apply to the Chief Judge of the
         United States District Court for the Northern District of Illinois for
         the appointment of such third arbitrator, and the Respondent(s) or the
         Claimant(s), as the case may be, shall not raise any question as to
         the Court's full power and jurisdiction to entertain the application
         and make the appointment. The decision of the arbitrators so chosen
         (or the majority decision of the arbitrators so chosen if three
         arbitrators are so chosen) shall, if practicable, be given within the
         period of thirty (30) days after the appointment of the final
         arbitrator and such decision shall in all cases be binding and
         conclusive upon the Parties. Unless otherwise determined by the
         decision of the arbitrators (or the majority decision of the
         arbitrators if three arbitrators are chosen): (i) each Party shall pay
         the fees and expenses of the one of the two original arbitrators
         appointed by such Party, or in whose stead as above provided such
         arbitrator was appointed; and (ii) the fees and expenses of the third
         arbitrator, if any, shall be borne equally by the Claimant(s) and the
         Respondent(s). All arbitration hereunder shall, unless otherwise
         agreed to by each of the Claimant(s) and Respondent(s), be conducted
         in Chicago, Illinois in accordance with the then-current rules of the
         American Arbitration Association. Anything herein contained to the
         contrary notwithstanding, the Parties to a disputed matter shall have
         the right to waive the provisions of this Section 10.7 calling for the
         appointment of two or three arbitrators, and by mutual agreement may
         select one arbitrator whose decision as to the disputed matter shall
         be binding and conclusive upon such Parties.
                  10.8 JURISDICTION AND SERVICE OF PROCESS. Any suit, action or
proceeding against any Party to enforce a decision made by the arbitrators
selected in accordance with Section 10.7(b) or to enforce the obligations of any
Party to resolve 
                                      -80-
   87
disputes pursuant to the arbitration procedure set forth in Section 10.7 shall
be brought in state court in the State of Illinois, or in the United States
District Court for the Northern District of Illinois, and each Party hereby
irrevocably waives, to the fullest extent permitted by law, any objection that
such Party may have, whether now or in the future, to the laying of venue in or
to the jurisdiction of, any and each of such courts for the purpose of any such
suit, action or proceeding and further waives any claim that any such suit,
action or proceeding has been brought in an inconvenient forum, and each Party
hereby submits to such jurisdiction. Each of the ▇-▇ Shareholders hereby further
irrevocably consents to the service of process in any suit, action or proceeding
with respect to this Agreement in any such court by the mailing thereof by
Penton or Pittway by registered or certified mail, charges prepaid, to such ▇-▇
Shareholder at the then current address for notices to such ▇-▇ Shareholder
pursuant to Section 10.4. Nothing herein shall in any way be deemed to limit the
ability of Penton or Pittway to serve such writs, process or summonses in any
other manner permitted by applicable law or to obtain jurisdiction over any ▇-▇
Shareholder in such other jurisdictions, and in such manner, as may be permitted
by applicable law.
                  10.9 MISCELLANEOUS. The representations and warranties
contained in this Agreement, in any Disclosure Letters, in any Exhibits attached
hereto and in other documents and agreements executed in connection herewith are
the sole and exclusive representations and warranties made by the Parties in
connection herewith, and no other representation or warranty shall be implied
hereunder or thereunder. This Agreement (together with the Confidentiality
Agreement and all other documents and instruments referred to herein): (a)
constitutes the entire agreement, and supersedes all other prior agreements and
undertakings, both written and oral, among the Parties, with respect to the
subject matter hereof (including, without limitation, the Letter of Intent); (b)
shall be binding upon the Parties and their respective heirs, executors,
personal representatives, successors and assigns and shall inure to the benefit
of the Parties and their respective heirs, executors, personal representatives,
successors and permitted assigns; (c) is not intended to confer upon any other
Person any rights or remedies hereunder; (d) shall not be assigned by operation
of law or otherwise except that this Agreement may be assigned by operation of
law to the Surviving Corporation and, provided such corporation assumes all of
the obligations of Pittway or Penton (as the case may be) hereunder, to any
corporation with or into which Pittway or Penton may be merged; and (e) shall be
governed by and construed in accordance with the domestic laws of the State of
Illinois, without giving effect to any choice of law or conflict of law
provision or rule (whether of the State of Illinois or any other jurisdiction)
that would cause the application of the laws of any jurisdiction other than the
State of Illinois. This Agreement may be executed in two or more counterparts
which together shall constitute a single agreement.
                                    * * * * *
                                      -81-
   88
         IN WITNESS WHEREOF, each of the undersigned has hereunto subscribed on
this the date first written above.
                                         Penton Media, Inc.
Attest:
By: /s/ ▇▇▇▇▇▇▇ ▇. Vice                  By: /s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇
   -----------------------------            -----------------------------
Its: Assistant Secretary                 Its: Chief Executive Officer
   -----------------------------            -----------------------------
                                         ▇-▇ Acquisition Corp.
Attest:
By: /s/ ▇▇▇▇▇▇▇ Zermuehlein              By: /s/ ▇▇▇▇ ▇▇▇▇▇▇▇
   -----------------------------            -----------------------------
Its: Secretary                           Its: Vice President
   -----------------------------            -----------------------------
                                         Pittway Corporation
Attest:
By: /s/ ▇▇▇▇▇▇▇ Zermuehlein              By: /s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ 
   -----------------------------            -----------------------------
Its: Assistant Secretary                 Its: Vice President
   -----------------------------            -----------------------------
                                         ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ Publishing Company
Attest:
By: /s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇                   By: /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
   -----------------------------            -----------------------------
Its: Executive Vice President            Its: President
   -----------------------------            -----------------------------
                                         /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                         ---------------------------------
                                         ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                         /s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇
                                         ---------------------------------
                                         ▇▇▇▇ ▇. ▇▇▇▇▇▇