LEASE
    THIS LEASE is made on the 6th day of April, 1989 by and between 
WDT-Shoreway hereinafter call  Lessor') and Domestic Automation Company 
(hereinafter called  Lessee').
    IN CONSIDERATION OF THE MUTUAL PROMISES HEREIN CONTAINED, THE PARTIES AGREE
AS FOLLOWS:
    1.   PREMISES. Lessor leases to Lessee and Lessee leases from Lessor, upon
         the terms and conditions herein set forth, those certain Premises
         ("Premises") situated in the City of ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇ ▇▇ ▇▇▇ ▇▇▇▇▇,
         ▇▇▇▇▇▇▇▇▇▇, as outlined in Exhibit "A" attached hereto and described
         as follows:  + 22,464 sq. ft, at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇, 94070
    2.   TERM.  The term of this Lease shall be for five (5) years commencing
         on July 1, 1989 and ending on June 30, 1994 unless sooner terminated
         pursuant to any provision hereof.
    3.   RENT.  Lessee shall pay to Lessor rent for the Premises of Twenty Six
         Thousand Nine Hundred Fifty-Seven and 00/100 Dollars ($26,957.00) per
         month in lawful money of the United States of America, subject to
         adjustment as provided in Section A of this Paragraph.  Rent shall be
         paid without deduction or offset, prior notice or demand, at such
         place as may be designated from time to time by Lessor as follows: 
         $9,660.00 shall be paid upon execution of the Lease, which sum
         represents the amount of the first month's rent.  A deposit of 
         $15,000.00 as a Security Deposit shall be made by Lessee and held by
         Lessor pursuant to Paragraph 5 of this Lease and shall also be paid
         upon execution of the Lease. [see NOTE 1] $26,957.00 [see Note 2]
         shall be paid on July 1, 1989  and in advance on the first (1st) day
         of each succeeding calendar month until June 1994. Rent for any period
         during the term hereof which is for less than one (1) full month shall
         be a pro-rata portion of the monthly rent payment.  Lessee
         acknowledges that late payment by Lessee to Lessor of rent or any
         other payment due Lessor will cause Lessor to incur costs not
         contemplated by this Lease, the exact amount of such costs being
         extremely difficult and impracticable to fix.  Such costs include,
         without limitation, processing and accounting charges, and late
         charges that may be imposed on Lessor by the terms of any encumbrance
         and note secured by any encumbrance covering the Premises.  Therefore,
         if any installment of rent or other payment due from Lessee is not
         received by Lessor within NINE (9) days following the date it is due
         and payable, Lessee shall pay to Lessor an additional sum of ten
         percent (10%) of the overdue amount as a late charge.  The parties
         agree that this late charge represents a fair and reasonable estimate
         of the costs that Lessor will incur by reason of late payment by
         Lessee.  Acceptance of any later charge shall not constitute a waiver
         of Lessee's default with respect to the overdue amount, nor prevent
         Lessor from exercising any of the other rights and remedies available
         to Lessor.
NOTE 1:  The security deposit shall be increased by Six Thousand and 00/ 100
Dollars ($6,000.00) the earlier of (i) March 15, 1990 or (ii) the return of the
security deposit by Tenant's current sublessor at Vintage Park.
NOTE 2:  Except that during months 1 through 6, inclusive, of the term, the
monthly rent shall be $9,660.00.
                                          1
         EXCEPT AS PROVIDED WITHIN, if for any reason whatsoever, Lessor can
         not deliver possession of the Premises on the commencement date set
         forth in Paragraph 2 above, this Lease shall not be void or voidable,
         nor shall Lessor be liable to Lessee for any loss or damage resulting
         therefrom; but in such event, Lessee shall not be obligated to pay
         rent until possession of the Premises is tendered to Lessee and the
         commencement and termination dates of this Lease shall be revised to
         conform to the date of Lessor's delivery of possession.  EXCEPT AS
         PROVIDED WITHIN, In the event that Lessor shall permit Lessee to
         occupy the Premises prior to the commencement of this Lease, such
         occupancy shall be subject to all of the provisions of this Lease,
         including the commencement of rent and obligation to maintain
         insurance.
    4.   OPTION TO EXTEND TERM.
         A.   Lessee shall have the option to extend the term on all the
              provisions contained in this Lease for two (2)-five (5) year
              period(s) ("extended term") at an adjusted rental calculated as
              provided in Subparagraph B below on conditions that:
              a.   Lessee has given to Lessor written notice of exercise of
                   that option ("Option notice") at least seven (7) months, but
                   not more than twelve (12) months before the expiration of
                   the initial term, or extended term(s), as the case may be.
              b.   Lessee is not in default in the performance of any of the
                   terms and conditions of the Lease on the data of giving the
                   option Notice, and Lessee is not in default on the date the
                   extended term is to commence.
                                          2
         SEE PARAGRAPH 35 OF ADDENDUM ATTACHED HERETO AND MADE PART HEREOF.
    5.   SECURITY DEPOSIT.  Lessor acknowledges that Lessee has deposited with
         Lessor a Security Deposit in the sum of $ 15,000,00 [see Note *] to
         secure the full and faithful performance by Lessee of each term,
         covenant, and condition of this Lease. If Lessee shall at any time
         fail to make any payment or fail to keep or perform any term,
         covenant, or condition on its part to be made or performed or kept
         under this Lease, Lessor may, but shall not be obligated to and
         without waiving or releasing Lessee from any obligation under this
         Lease, use, apply, or retain the whole or any part of said Security
         Deposit (a) to the extent of any sum due to Lessor: or (b) to make any
         required payment on Lessee's behalf; or (c) to compensate Lessor for
         any loss, damage, attorneys' fees or expense sustained by Lessor due
         to Lessee's default.  In such event, Lessee shall, within five (5)
         days of written demand by Lessor, remit to Lessor sufficient funds to
         restore the Security Deposit to its original sum.  No interest shall
         accrue on the Security Deposit.  Should Lessee comply with all the
         terms, covenants and conditions of this Lease and at the end of the
         term of this Lease leave the Premises in the condition required by
         this Lease, then said Security Deposit or any balance thereof, less
         any sums owing to Lessor, shall be returned to Lessee within fifteen
         (15) days after the termination of this Lease and vacancy of the
         Premises by Lessee. Lessor can maintain the Security Deposit separate
         and apart from Lessor's general funds, or can co-mingle the Security
         Deposit with Lessor's general and other funds.
    6.   USE OF THE PREMISES.  The Premises shall be used exclusively for the
         purpose of gen. office, administration, R&D, manufacturing and
         distribution of electronic parts & other related legal uses as set
         forth in the existing zoning ordinances in the City of San ▇▇▇▇▇▇.
         Lessee shall not use, or permit the Premises, or any part thereof, to
         be used, for any purpose other than the purpose for which the Premises
         are hereby leased; and no use shall be made or permitted to be made of
         the Premises, nor acts done, which will increase the existing rate of
         insurance upon the building in which the Premises are located, (EXCEPT
         THAT LESSEE MAY PAY THE COST OF SUCH INSURANCE INCREASE), or cause a
         cancellation of any insurance policy covering said building, or any
         part thereof, nor shall Lessee sell or permit to be kept, used or
         sold, in or about the Premises, any article which may be prohibited by
         the standard form of fire insurance policies. Lessee shall not commit,
         or suffer to be committed, any waste upon the Premises, or any public
         or private nuisance, or other act or thing which may disturb the quiet
         enjoyment of any other tenant in the building in which the Premises
         are located; nor,without limiting the generality of the foregoing,
         shall Lessee allow the Premises to be used for any improper, immoral,
         unlawful or objectionable purpose.
NOTE *:  which shall be increased by Six Thousand and 00/100 Dollars ($6,000.00)
the earlier of (i) March 15, 1990 or (ii) the return of Security Deposit
currently held by sublessor at Vintage Park.
                                          3
         Lessee shall not place any harmful liquids in the drainage system of
         the Premises or of the building of which the Premises form a part.  No
         waste materials or refuse shall be dumped upon or permitted to remain
         upon any part of the premises outside of the building property except
         in trash containers placed inside exterior enclosures designated for
         that purpose by Lessor, or inside the building proper where designated
         by Lessor.  No material, supplies, equipment, finished or semi-
         finished products, raw materials or articles of any nature shall be
         stored upon or permitted to remain on any portion of the Premises
         outside of the building proper.  The term "Hazardous Material" means
         any hazardous or toxic substance, material or waste the storage, use,
         or disposition of which is or becomes regulated by any local
         governmental authority, the State of California or the United States
         government.  The term "Hazardous Material" includes, without
         limitation, any material or substance which is (i) defined as a
         "hazardous waste", "extremely hazardous waste" or "restricted
         hazardous waste" under Section 25115, 25117 pr 25122.7, or listed
         pursuant to Section 25140, of the California Health and Safety Code,
         Division 20, Chapter 6.5 (Hazardous Waste Control law), (ii) defined
         as a "hazardous substance" under Section 25136 of the California
         Health and Safety Code, Division 20, Chapter 6.8 (▇▇▇▇▇▇▇▇▇-▇▇▇▇▇▇▇-
         ▇▇▇▇▇▇ Hazardous Substance Account Act), (iii) defined as a "hazardous
         material", "hazardous substance", or "hazardous waste" under Section
         25501 of the California Health and Safety Code, Division 20, Chapter
         6.95 (Hazardous Materials Release Response Plans and Inventory), (iv)
         defined as a "hazardous substance" under Section 25281 of the
         California Health and Safety Code, Division 20, Chapter 6.7
         (Underground Storage of Hazardous Substances), (v) petroleum, (vi)
         asbestos, (vii) listed under Article 9 or defined as hazardous or
         extremely hazardous pursuant to Article 11 of Title 22 of the
         California Administrative Code, Division 4, Chapter 20, (vii)
         designated, as a "hazardous substance" pursuant to Section 311 of the
         Federal Water Pollution Control Act (33 U.S.C. Section 1317), (ix)
         defined as a "hazardous waste" pursuant to Section 1004 of the Federal
         Resource Conservation and Recovery Act, 42 U.S.C. Section 6901 ET SEQ.
         (42 U.S.C. Section 6903), or (x) defined as a "hazardous substance"
         pursuant to Section 101 of the Comprehensive Environmental Response
         Compensation and Liability Act, 42 U.S.C. Section 9601 ET SEQ., (42
         U.S.C. Section 9601), or (xi) listed or defined as "hazardous waste",
         "hazardous substance", or other similar designation by any regulatory
         scheme of the State of California or the United States Government.
         Lessee, at its sole cost shall comply with all laws and regulations
         relating to its storage, use and disposal of Hazardous Materials on
         the Premises.  If Lessee does store, use or dispose of any Hazardous
         Materials on the Premises, Lessee shall notify Lessor, in writing at
         least five (5) days prior to their first appearance on the Premises.
         Lessee shall be solely responsible for and shall defend, indemnify and
         hold Lessor, and Lessor's partners, officers, employees, successors,
         assigns and agents harmless from and against all claims, demands,
         damages, costs and liabilities, including attorneys' fees and costs,
         arising out of or in connection with the storage, use, or disposal of
         Hazardous Materials by Lessee, its agents, employees, or contractors.
         If the presence of Hazardous Materials WHICH WERE INTRODUCED, STORED,
         DISPOSED OF OR TRANSPORTED IN OR on the Premises caused or permitted
         by Lessee, its agents, employees, contractors, or sublessees results
         in contamination or deterioration of water or soil resulting in a
         level of contamination greater than the safe levels established by any
         governmental agency having jurisdiction over such contamination or if
         any investigation of conditions, or any clean up, remedial removal or
         restoration work is required by any federal, state or local
         governmental agency or political subdivision ("Governmental Agency")
         because of the level of Hazardous Material in the soil or ground water
         WHICH WERE INTRODUCED, STORED, DISPOSED OF OR TRANSPORTED IN OR on the
         Premises by Lessee, its agents, employees, contractors, or sublessees,
         Lessee shall promptly, and at its sole cost, take any and all action
         necessary to investigate and clean up such contamination.  At any time
         prior to the expiration of the Lease Term, Lessee shall have the right
         to conduct appropriate tests of waste and soil
                                          4
         and to deliver to Lessor the results of such tests to demonstrate that
         no contamination has occurred as a result of Lessee's use of the
         Premises.  Lessee shall further be solely responsible for, and shall
         defend, indemnity and hold Lessor and Lessor's partners, officers,
         employees, successors, assigns and agents harmless from and against,
         all claims, demands, damages, costs and liabilities, including
         attorneys' fees and costs, arising out of or in connection with any
         removal, clean-up and restoration work and materials required
         hereunder to return the Premises, the Property of which the Premises
         are a part or the surrounding properties to its condition existing
         prior to the appearance of the Hazardous Materials WHICH WERE
         INTRODUCED, STORED, DISPOSED OF OR TRANSPORTED IN OR ON THE PREMISES
         by Lessee, its agents, employees, contractors, or sublessees.
         If Lessor has good cause to believe that the Premises or the Property
         which the Premises are a part, have or may become contaminated by
         Hazardous Materials, Lessor may cause test to be performed, including
         ▇▇▇▇▇ to be installed on the Premises, and may cause the soil or
         ground water to be tested to detect the presence of Hazardous
         Materials by the use of such tests as are then customarily used for
         such purposes.  If Lessee so requests, Lessor shall supply Lessee with
         copies of such test results. The cost of such tests of the
         installation, maintenance, repair and replacement of such ▇▇▇▇▇ shall
         be paid by Lessee PROVIDED THAT THE RESULTS OF SUCH TESTS CONFIRM THE
         PRESENCE OF ANY HAZARDOUS MATERIALS AND LESSEE, ITS AGENTS, EMPLOYEES,
         CONTRACTORS OR SUBLESSEES WHICH WERE INTRODUCED, STORED, DISPOSED OF
         OR TRANSPORTED IN OR ON THE PREMISES.  Lessee shall have the right at
         any time during the Lease term to conduct its own test of the soil
         and/or ground water underlying the Property by using such ▇▇▇▇▇ so
         long as each of the following conditions arc satisfied: (i) such tests
         are conducted by Lessee at its own expense, (ii) it repairs any
         damages to such ▇▇▇▇▇ cause by such test; (iii) it holds Lessor, and
         Lessor's partners, officers, employees, assigns, successors and agents
         harmless from any cost, liability or claims including reasonable
         attorney's fees, from its tests including mechanic's lies as well as
         contamination to the Property or surrounding properties including the
         soil and groundwater thereunder, and (iv) it timely delivers copies of
         the results of such test to Lessor.
         The termination of the Lease shall not terminate the parties' rights
         and obligations under this Paragraph and the parties hereto expressly
         agree that the provisions contained herein shall survive the
         termination of Lessee's leasehold estate.
         Lessee shall abide by all laws, ordinances and statutes, as they now
         exist or may hereafter be enacted by legislative bodies having
         jurisdiction thereof, relating to its use and occupancy of the
         Premises.
         SEE PARAGRAPH 36 OF ADDENDUM ATTACHED HERETO AND MADE PART HEREOF.
    7.   IMPROVEMENTS.  Lessor will, at its sole expense, make improvements to
         the Premises as specified in Exhibit "B" attached hereto and by this
         reference made a part hereof.  Lessor will make reasonable efforts to
         complete such improvements prior to July 1,1989.
    8.   TAXES AND ASSESSMENTS.
         A.   Lessee shall pay before delinquency any and all taxes,
              assessments, license fees and public charges levied, assessed or
              imposed upon or against Lessee's fixtures, equipment, furnishes,
              furniture, appliances and personal property installed or located
              on or within the Premises.  Lessee shall cause said fixtures,
              equipment, furnishings, furniture, appliances and personal
              property to be assessed and billed separately from the real
              property of Lessor.  If any of Lessee's said personal property
              shall be assessed with Lessor's real property, Lessee shall pay
              to Lessor the taxes attributable to Lessee within ten (10) days
              after receipt of a written statement from Lessor setting forth
              the taxes applicable to Lessee's property.
                                          5
         B.   All property taxes or assessments levied or assessed or hereafter
              levied or assessed, by any governmental authority, against the
              Premises or any portion of such taxes or assessments which
              becomes due or accrued during the term of this Lease shall be
              paid by Lessor.  Lessee shall reimburse Lessor for Lessee's
              proportionate share of such taxes or assessments within ten (10)
              days of receipt of Lessor's invoice demanding such payment.
              Lessee's liability hereunder shall be prorated to reflect the
              commencement and termination dates of this Lease.
         ▇.   ▇▇▇▇▇▇ AGREES NOT TO INITIATE THE FORMATION OF ANY ASSESSMENT
              DISTRICT WHEREBY THE RESULTANT EFFECT SHALL BE AN INCREASE IN THE
              PROPERTY TAXES DUE TO THE REPAYMENT OF THE ASSESSMENT BONDS.  IF
              SUCH AN ASSESSMENT DISTRICT IS FORMED, LESSOR AGREES TO USE ITS
              BEST EFFORTS, WITHOUT WARRANTY OF SUCCESS, THAT SUCH DISTRICT IS
              FINANCED BY AN ASSESSMENT DISTRICT BOND PROVIDING FOR PERIODIC
              PAYMENTS AND NOT FINANCED WITH A REQUIREMENT FOR A SINGLE
              "LUMP-SUM" PAYMENT.
    9.   INSURANCE.
         A.   INDEMNITY. Lessee agrees to indemnify and defend Lessor against
              and hold Lessor and Lessor's partners, employees, officers,
              assigns and successors harmless from any and all demands, claims,
              causes of action, judgments, obligation or liabilities, and all
              reasonable expenses incurred in investigating or resisting the
              same (including reasonable attorneys' fees), on account of, or
              arising out of, the condition, use or occupancy of the Premises.
              This Lease is made on the express condition that Lessor shall not
              be liable for, or suffer loss by reason of, injury to person or
              property, from whatever cause, in any way connected with the
              condition, use or occupancy of the Premises specifically
              including, without limitation, any liability for injury to the
              person or property of Lessee, its agents, officers, employees,
              licensees and invitees, EXCEPT THAT SUCH INDEMNITY BY LESSEE OF
              LESSOR SHALL NOT INCLUDE AN INDEMNITY FOR RESULTS OF LESSOR'S
              NEGLIGENCE OR WILLFUL MISCONDUCT.  FURTHERMORE, LESSOR HEREBY
              INDEMNIFIES LESSEE AGAINST ANY COST OR CLAIM RESULTING FRONT
              LESSOR'S NEGLIGENCE OR WILLFUL MISCONDUCT.
         B.   LIABILITY INSURANCE. Lessee shall, at the Lessee's expense,
              obtain and keep in force during the term of this Lease a policy
              of comprehensive public liability insurance insuring Lessor and
              Lessee, with cross-liability endorsements, against any liability
              arising out of the condition, use or occupancy of the Premises
              and all areas appurtenant thereto, including parking areas.  Such
              insurance shall be in an amount satisfactory to Lessor of not
              less than $1,000,000 for bodily injury or death as a result of
              any one occurrence, and $500,000 for damage to property as a
              result of any one occurrence.  The insurance shall be with
              companies of Best's Rating Guide of A+9 or better and approved by
              Lessor, which approval Lessor agrees not to unreasonably
              withhold.  Lessee shall deliver to Lessor prior to possession, a
              certificate of insurance evidencing the existence of the policy
              required hereunder and such certificate shall certify that the
              policy (1) names Lessor as an additional insured (2) shall not be
              canceled or altered without thirty (30) days prior written notice
              to Lessor, (3) insures performance of the indemnity set forth in
              Subparagraph (A) above, and (4) the coverage is primary and any
              coverage by Lessor is in excess thereto.
         C.   PROPERTY INSURANCE. Lessor shall obtain and keep in force during
              the term of this Lease a policy or policies of insurance coverage
              including fire, extended coverage, earthquake and flood, for loss
              or damage to the Premises, in the amount of the full replacement
              value thereof.  Lessee shall pay to Lessor its pro-rata share of
              the cost of said insurance within ten (10) days of Lessee's
              receipt of Lessor's invoice demanding such payment.
                                          6
         D.   MUTUAL WAIVER OF SUBROGATION. Lessee AND LESSOR hereby release
              EACH OTHER and its partners, officers, agents, employees and
              servants, from any and all claims, demands, loss, expense, or
              injury to the Premises or to the furnishings, fixtures,
              equipment, caused by or results from perils, events or happenings
              OF THE TYPE which are the subject of insurance in force at the
              time of such loss OR REQUIRED TO BE CARRIED BY THIS LEASE.
    10.  OPERATION, MANAGEMENT, SERVICES AND UTILITIES. Lessee shall pay its
         share, based upon the percentage of occupancy for all expenses of
         operation and management of the Premises and the Property of which the
         Premises are a part, including, but not limited to, water, gas, light,
         heat, power, electricity, telephone, trash pick-up, property
         management, landscaping, sewer charges, and all other services,
         supplied to or consumed on the Premises or the Property of which the
         Premises are a part.  In the event that any such services are billed
         directly to Lessor, then Lessee shall reimburse Lessor for such
         expenses within ten (10) days of Lessee's receipt of Lessor's invoice
         demanding payment. Lessee acknowledges and agrees to reimburse Lessor
         an additional five percent (5%) of said expenses in order to
         compensate Lessor for accounting and processing services.  LESSEE'S
         SHARE IS HEREBY AGREED TO 27.13% (+ OR - 22,464 SF/+ OR - 82,816 SF).
         SEE PARAGRAPH 37 OF ADDENDUM ATTACHED HERETO AND MADE PART HEREOF.
    11.  REPAIRS AND MAINTENANCE.
         A.   Subject to provisions of Paragraph 15, Lessor shall keep and
              maintain the roof, paving, structural elements, landscaping,
              irrigation, and exterior walls of the building in which the
              Premises are located in good order and repair.  Lessee shall
              reimburse Lessor for its proportionate share of said expenses
              within ten (10) days of Lessee's receipt of Lessor's invoice
              demanding payment.  If, however, any repairs or maintenance are
              required because of an act or omission of Lessee, or its agents,
              employees or invitees, Lessee shall pay to Lessor upon demand
              100% of the costs of such repair or maintenance.
         B.   Except as expressly provided in Subparagraph (A) above, Lessee
              shall, at its sole cost, keep and maintain the entire Premises
              and every part thereof, including, without limitation, the
              windows, window frames, plate glass, glazing, truck doors, doors,
              all door hardware, interior of the Premises, interior walls and
              partitions, and the electrical, plumbing, lighting, heating and
              air conditioning systems in good and sanitary order, condition
              and repair.  Lessee shall, at its own expense, for the duration
              of this Lease, retain a service company, approved by Lessor, to
              provide routine maintenance and repairs of the heating,
              ventilation, and air conditioning system.
              Should Lessee fail to maintain the Premises or make repairs
              required of Lessee hereunder forthwith upon notice from Lessor,
              Lessor, in addition to all other remedies available hereunder or
              by law, and without waiving any alternative remedies, may make
              the same, and in that event, Lessee shall reimburse Lessor as
              additional rent for the cost of such maintenance or repairs on
              the next date upon which rent becomes due.
              Lessee hereby expressly waives the provision of Sub-section 1 of
              Section 1932, and Sections 1941 and 1942 of the Civil Code of
              California and all rights to make repairs at the expense of
              Lessor, as provided in Section 1942 of said Civil Code.
              SEE PARAGRAPH 38 OF ADDENDUM ATTACHED HERETO AND MADE PART
              HEREOF.
                                          7
    12.  ALTERATIONS AND ADDITIONS.  Lessee shall not make, or suffer to be
         made, any alterations, improvements, or additions in, on, or about, or
         to the Premises or any part thereof, without the prior written consent
         of Lessor and without a valid building permit issued by the
         appropriate governmental authority.  Lessor retains, at his sole
         option, the right to perform all repairs, alterations, improvements or
         additions in, on, about, or to said Premises or any part thereof.
         LESSEE SHALL HAVE THE RIGHT TO MAKE SUCH ALTERATION WITH ONLY TEN (10)
         DAYS ADVANCE NOTICE TO LESSOR AND BY A VALID BUILDING PERMIT (IF
         NECESSARY), PROVIDED THE AGGREGATE COST OF SUCH ALTERATION(S), IN ANY
         YEAR, SHALL NOT EXCEED TEN THOUSAND DOLLARS ($10,000).  As a condition
         to giving such consent, Lessor may require that Lessee agree to remove
         any such alterations, improvements or additions at the termination of
         this Lease, and to restore the Premises to their prior condition.  Any
         alteration, addition or improvement to the Premises, except movable
         furniture and trade fixtures not affixed to the Premises, shall become
         the property of Lessor upon installation, and shall remain upon and be
         surrendered with the Premises at the termination of this Lease.
         Lessor can elect, however, within thirty (30) days before expiration
         of the term or within five (5) days after termination of the term, to
         require Lessee to remove any alterations, additions or improvements
         that Lessee has made to the Premises.  If Lessor so elects, Lessee
         shall restore the Premises to the condition designated by Lessor in
         its election, before the last day of the term, or within thirty (30)
         days after notice of election is given, whichever is later.
         Alterations and additions which are not to be deemed as trade fixtures
         include heating, lighting, electrical systems, air conditioning,
         partitioning, electrical signs, carpeting, or any other installation
         which has become an integral part of the Premises.  In the event
         Lessor consents to Lessee's making any alterations, improvements, or
         additions, Lessee shall be responsible for the timely posting of
         notices of non-responsibility on Lessor's behalf, which shall remain
         posted until completion of the alterations, additions or improvements.
         Lessee's failure to post notices of non-responsibility as required
         hereunder shall be a breach of this Lease.
         If, during the term hereof, any alteration, addition or change of any
         sort through all or any portion of the Premises or of the building of
         which the Premises form a part, is required by law, regulation,
         ordinance or order of any public agency, Lessee, at its sole cost and
         expense, shall promptly make the same.
    13.  ACCEPTANCE OF THE PREMISES AND COVENANT TO SURRENDER. EXCEPT AS
         PROVIDED WITHIN, by entry and taking possession of the Premises
         pursuant to this Lease, Lessee accepts the Premises as being in good
         and sanitary order, condition and repair, and accepts the Premises in
         their condition existing as of date of such entry, and Lessee further
         accepts any tenant improvements to be constructed by Lessor, if any,
         as being completed in accordance with the plans and specifications for
         such improvements.
         Lessee agrees on the last day of the term hereof, or on sooner
         termination of this Lease, to surrender the Premises, together with
         all alterations, additions and improvements which may have been made
         in, to, or on the Premises by Lessor or Lessee, unto Lessor in good
         and sanitary order, condition and repair, excepting for such wear and
         tear as would be normal for the period of the Lessee's occupancy AND
         HAZARDOUS MATERIALS (OTHER THAN THOSE STORED, USED, GENERATED OR
         DISPOSED OF BY LESSEE IN/OR ABOUT THE PREMISES).  Lessee, on or before
         the end of the term or sooner termination of this Lease, shall remove
         all its personal property and trade fixtures from the Premises, and
         all property not so removed shall be deemed to be abandoned by Lessee.
         Lessee further agrees that at the end of the term or sooner
         termination of this Lease, Lessee at its sole expense, shall have the
         carpets steam cleaned, the vinyl floors waxed, the concrete floors
         mopped, the walls and columns painted, any damaged ceiling title
         replaced, light lenses and ballasts in good order and repair, the
         windows cleaned, the drapes/blinds cleaned, and any damaged doors
         replaced.
                                          8
         If the Premises are not surrendered at the end of the term or sooner
         termination of this Lease, Lessee shall indemnify Lessor against loss
         or liability resulting from delay by Lessee in so surrendering the
         Premises, including, without limitation, any claims made by any
         succeeding tenant founded on such delay EXCEPT THAT IF SUCH DELAY IS
         CAUSED BY LESSOR, ITS AGENTS OR EMPLOYEES, THEN LESSEE SHALL NOT BE
         LIABLE TO LESSOR FOR ANY SUCH COST OF DELAY. 
         SEE PARAGRAPH 39 OF ADDENDUM ATTACHED HERETO AND MADE PART HEREOF.
    14.  DEFAULT. In the event of any breach of this Lease by the Lessee, or an
         abandonment of the Premises by the Lessee, the Lessor has the option
         of (1) removing all persons and property from the Premises and
         repossessing the Premises, in which case any of the Lessee's property
         which the Lessor removes from the Premises may be stored in a public
         warehouse or elsewhere at the cost of, and for the account of Lessee,
         or (2) allowing the Lessee to remain in full possession and control of
         the Premises.  If the Lessor chooses to repossess the Premises, the
         Lease will automatically terminate in accordance with the provisions
         of California Civil Code, Section 1951.2. In the event of such
         termination of the Lease, the Lessor may recover from the Lessee: (1)
         the worth at the time of award of the unpaid rent which had been
         earned at the time of termination, including interest at the maximum
         rate an individual is permitted by law to charge; (2) the worth at the
         time of award of the amount by which the unpaid rent which would have
         been earned after termination until the time of award exceeds the
         amount of such rental loss that the Lessee proves could have been
         reasonably avoided, including interest at the maximum rate an
         individual is permitted by law to charge; (3) the worth at the time of
         award of the amount by which the unpaid rent for the balance of the
         term after the time of award exceeds the amount of such rental loss
         that the Lessee proves could be reasonably avoided; and (4)any other
         amount necessary to compensate the Lessor for all the detriment
         proximately caused by the Lessee's failure to perform his obligations
         under the Lease or which, in the ordinary course of things, would be
         likely to result therefrom. "The worth at the time of the award", as
         used in (1) and (2)of this paragraph, is to be computed by allowing
         interest at the maximum rate an individual is permitted by law to
         charge.  "The worth at the time of the award", as referred to in (3)
         of this paragraph, is to be computed by discounting the amount at the
         discount rate of the Federal Reserve Bank of San Francisco at the time
         of the award, plus one percent (1%).
         If the Lessor chooses not to repossess the Premises, but allows the
         Lessee to remain in full possession and control of the Premises, but
         allows in accordance with provisions of California Civil Code, Section
         1951.4, the Lessor may treat the Lease as being in full force and
         effect, and may collect from the Lessee all rents as they become due
         through the termination date of the Lease, as specified in the Lease.
         For the purpose of this paragraph, the following do not constitute a
         termination of Lessee's right to possession:
         A.   Acts of maintenance or preservation, or effect to relet the
              property.
         B.   The appointment of a receiver on the initiative of the Lessor to
              protect this interest under this Lease.
         Lessee shall be liable immediately to Lessor for all costs Lessor
         incurs in reletting the Premises, including, without limitation,
         brokers' commission, expenses of remodeling the Premises required by
         the reletting, and like costs.  Reletting can be for a period shorter
         or longer than the remaining term of this Lease.  Lessee shall pay to
         Lessor the rent due under this Lease on the dates the rent is due,
         less the rent Lessor receives from this Lease unless Lessor notifies
         Lessee that Lessor elects to terminate this Lease. After Lessee's
         default and for as long as Lessor does not terminate Lessee's right to
         possession of the Premises, if Lessee obtains Lessor's consent, Lessee
         shall have the right to assign or sublet its interest in this Lease,
         but Lessee shall not be released from liability.  Lessor's consent to
         a proposed assignment or subletting shall not be unreasonably
         withheld.
                                          9
         If Lessor elects to relet the Premises as provided in this Paragraph,
         rent that Lessor receives from reletting shall be applied to the
         payment of:
              First, any indebtedness from Lessee to Lessor other than rent due
              from Lessee;
              Second, all cost, including for maintenance, incurred by Lessor
              in reletting;
              Third, rent due and unpaid under this Lease.  After deducting the
              payments referred to in this Paragraph, any sum remaining from
              the rent Lessor receives from reletting shall be held by Lessor
              and applied in payment of future rent as rent becomes due under
              this Lease.  In no event shall Lessee be entitled to any excess
              rent received by Lessor.  If, on the date rent is due under this
              Lease, the rent received from reletting is less than the rent due
              on that date, Lessee shall pay to Lessor, in addition to the
              remaining rent due, all costs including for maintenance, Lessor
              incurred in reletting that remain after applying the rent
              received form the Reletting, as provided in this Paragraph.
         Lessor at any time after Lessee commits a default, can cure the
         default at Lessees cost. If Lessor at any time, by reason of Lessee's
         default, pays any sum or does any act that requires the payment of any
         sum, the sum paid by Lessor shall be due immediately from Lessee to
         Lessor at the time the sum is paid, and if paid at a later date shall
         bear interest at the time the sum is paid, and if paid at a later date
         shall bear interest at the maximum rate an individual is permitted by
         law to charge from the date the sum is paid by Lessor until Lessor is
         reimbursed by Lessee.  The sum, together with interest on it, shall be
         additional rent.
         Rent not paid when due shall bear interest at the maximum rate an
         individual is permitted by law to charge from the date due until paid.
    15.  DESTRUCTION. In the event the Premises are destroyed in whole or in
         part from any cause, Lessor may, at its option:
         A.   Rebuild or restore the Premises to their condition prior to the
              damage or destruction; or
         B.   Terminate the Lease.
         LESSOR SHALL give to Lessee notice in writing within thirty (30) days
         from the destruction of the Premises of its election to either rebuild
         and restore the Premises, or to terminate this Lease; IF Lessor shall
         have elected to rebuild or restore them, in which event Lessor agrees,
         at its expense, promptly to rebuild or restore the Premises to its
         condition prior to the damage or destruction. LESSOR AGREES TO PROVIDE
         LESSEE WITH ITS PROJECTED SCHEDULE OF SUCH REPAIRS WITH ITS TIMELY
         WRITTEN NOTICE TO LESSEE OF ITS ELECTION TO REBUILD.  IF LESSOR ELECTS
         TO TERMINATE THIS LEASE, THE TERMINATION SHALL BE EFFECTIVE AS OF SUCH
         DATE OF DESTRUCTION AND ANY MONIES PAID BY LESSEE SUBSEQUENT TO THE
         DATE OF DESTRUCTION SHALL BE RETURNED TO LESSEE. IF LESSOR'S PROJECTED
         SCHEDULE ESTABLISHES THAT THE TIME TO REBUILD IS TO BE IN EXCESS OF
         ONE-HUNDRED EIGHTY (180) DAYS, OR Lessor does not complete the
         rebuilding or restoration within one hundred eighty (180) days
         following the date of destruction, (such period of time to be extended
         for delays caused by the fault or neglect of Lessee or because of acts
         of God, acts of public agencies, labor disputes, strikes, fires,
         freight embargoes, rainy or stormy weather, inability to obtain
         materials, supplies or fuels, acts of contractors or subcontractors,
         or delay of the contractors or subcontractors due to such causes or
         other contingencies beyond the control of Lessor), then Lessee shall
         have the right to terminate this Lease by giving fifteen (15) days
         prior written notice to Lessor.  Lessor's obligation to rebuild or
         restore shall not include restoration of Lessee's trade fixtures,
         equipment, merchandise, or any improvements, alterations or additions
         made by Lessee to the Premises.
         Unless this Lease is terminated pursuant to the foregoing provisions,
         this Lease shall remain in full force and effect.  Lessee hereby
         expressly waives the provisions of Section 1932, Subdivision 2, and
         Section 1933, Subdivision 4, of the California Civil Code.
                                          10
         In the event that the building in which the Premises are situated is
         damaged or destroyed to the extent of not less than 33-1/3 percent of
         the replacement cost thereof, Lessor may elect to terminate this
         Lease, whether the Premises be injured or not.
         LESSOR AND LESSEE SHALL EACH HAVE THE RIGHTS TO TERMINATE THE LEASE IF
         (I) ANY DAMAGE TO THE PREMISES OCCURS DURING THE LAST YEAR OF THE TERM
         OF THE LEASE AND (II) IT IS ESTIMATED BY LESSOR THAT NECESSARY REPAIRS
         WILL NOT BE COMPLETED WITHIN SIXTY (60) DAYS FROM THE DATE OF SUCH
         DAMAGE, UNLESS LESSEE HAS AN OPTION TO EXTEND THE TERM OF THE LEASE
         AND LESSEE EXERCISES SUCH OPTION WITHIN THIRTY (30) DAYS OF THE DATE
         OF SUCH DAMAGE.
    16.  CONDEMNATION.  If any part of the Premises shall be taken for any
         public or quasi-public use, under any statute or by right of eminent
         domain, or private purchase in lieu thereof, and a part thereof
         remains, which is susceptible of occupation hereunder, this Lease
         shall, as to the part so taken, terminate as of the date title shall
         vest in the condemnor or purchaser, and the rent payable hereunder
         shall be adjusted so that the Lessee shall be required to pay for the
         remainder of the term only such portion of such rent as the value of
         the part remaining after such taking bears to the value of the entire
         Premises prior to such taking.  Lessor AND LESSEE shall have the
         option to terminate this Lease in the event that such taking causes a
         reduction in rent payable hereunder by fifty percent (50%) or more.
         If all of the Premises or such part thereof be taken so that there
         does not remain a portion susceptible for occupation hereunder, as
         reasonably necessary for Lessee's conduct of its business as
         contemplated in this Lease, this Lease shall thereupon terminate. if a
         part or all of the Premises be taken, all compensation awarded upon
         such taking shall go to the Lessor, and the Lessee shall have no claim
         thereto, and the Lessee hereby irrevocably assigns and transfers to
         the Lessor any right to compensation or damages to which the Lessee
         may become entitled during the term hereof by reason of the purchase
         or condemnation of all or a part of the Premises.  Each party waives
         the provisions of Code of Civil Procedure, Section 1265.130, allowing
         either party to petition the superior court to terminate this Lease in
         the event of a partial taking of the Premises.
    17.  FREE FROM LIENS.  Lessee shall (1) pay for all labor and services
         performed for materials used by or furnished to Lessee, or any
         contractor employed by Lessee with respect to the Premises, and (2)
         indemnify, defend and hold Lessor and the Premises harmless and free
         from any liens, claims, demands, encumbrances, or judgments created or
         suffered by reason of any labor or services performed for materials
         used by or furnished to Lessee or any contractor employed by Lessee
         with respect to the Premises, and (3) give notice to Lessor in writing
         five (5) days prior to employing any laborer or contractor to perform
         services related, or receiving materials for use upon the Premises,
         and (4) shall post, on behalf of Lessor, a notice of non-responsibility
         in accordance with the statutory requirements of California Civil Code,
         Section 3094, or any amendment thereof.  In the event an improvement
         bond with a public agency in connection with the above is required to
         be posted, Lessee agrees to include Lessor as an additional obligee.
         IN NO EVENT SHALL LESSEE BE RESPONSIBLE FOR INDEMNIFYING LESSOR, OR
         HOLDING LESSOR FREE FROM LIENS FOR WORK CONTRACTED BY LESSOR FOR THE
         INITIAL BUILD-OUT AS CONTEMPLATED IN EXHIBIT "B" HEREOF.
    18.  COMPLIANCE WITH LAWS.  Lessee shall, at its own cost, comply with and
         observe all requirements of all municipal, county, state and federal
         authority now in force, or which may hereafter be in force, pertaining
         to the use and occupancy of the Premises.  SHOULD ANY MODIFICATIONS TO
         THE PREMISES BE REQUIRED BECAUSE OF LESSEE'S USE OF THE SAME, LESSEE
         SHALL BE RESPONSIBLE FOR THE COST OF SUCH MODIFICATIONS.  IN NO EVENT
         SHALL LESSEE BE REQUIRED TO PAY ANY PORTION OF THE COST OF COMPLIANCE
         WITH LAWS OR CODES STRICTLY RELATING TO BUILDINGS.
                                          11
    19.  SUBORDINATION. Lessee agrees that this Lease shall, at the option of
         Lessor, be subjected and subordinated to any mortgage, deed of trust,
         or other instrument of security, which has been or shall be placed on
         the land and building, or land or building of which the Premises form
         a part, and this subordination is hereby made effective without any
         further act of Lessee or Lessor PROVIDED THE HOLDER OF ANY SUCH
         MORTGAGE, DEED OF TRUST, OR OTHER INSTRUMENT OF SECURITY, PROVIDES
         LESSEE WITH A NONDISTURBANCE OF ATTORNMENT AGREEMENT IN A FORM
         REASONABLY SATISFACTORY TO LESSEE.  The Lessee shall, at any time
         hereinafter, on demand, execute any instruments, releases or other
         documents that may be required by a mortgagee, mortgagor, or trustor,
         or beneficiary under any deed of trust, for the purpose of subjecting
         or subordinating this Lease to the lien of any such mortgage, deed of
         trust, or other instrument of security PROVIDED THE HOLDER OF ANY SUCH
         MORTGAGE, DEED OF TRUST, OR OTHER INSTRUMENT OF SECURITY, PROVIDES
         LESSEE WITH A NON-DISTURBANCE AND ATTORNMENT AGREEMENT IN A FORM
         REASONABLY SATISFACTORY TO LESSEE.   IF LESSEE REQUESTS A NON-
         DISTURBANCE AND ATTORNMENT AGREEMENT ("AGREEMENT") FOR ANY MORTGAGE
         HOLDER OF THE SUBJECT PROPERTY, LESSOR AGREES TO USE ITS BEST EFFORTS
         TO HAVE SAID MORTGAGE HOLDER PROVIDE LESSEE WITH SUCH AGREEMENT IN
         INDUSTRY STANDARD FORM STATING, AMONG OTHER THINGS, THAT SHOULD LESSEE
         NOT BE IN DEFAULT UNDER THIS LEASE, LESSEE WILL BE ENTITLED TO ITS
         QUIET ENJOYMENT OF LEASED PREMISES. SEE PARAGRAPH 40 OF ADDENDUM
         ATTACHED HERETO AND MADE PART HEREOF.
    20.  ABANDONMENT.  Lessee shall not vacate nor abandon the Premises at any
         time during the term; and if Lessee shall abandon, vacate or surrender
         said Premises, or be dispossessed by process of law, or otherwise, any
         personal property belonging to Lessee and left on the Premises shall
         be deemed to be abandoned, at the option of Lessor, except such
         property as maybe mortgaged to Lessor; provided, however, that Lessee
         shall not be deemed to have abandoned or vacated the Premises so long
         as Lessee continues to pay all rents as and when due, and otherwise
         performs pursuant to the terms and conditions of this Lease.
    21.  ASSIGNMENT AND SUBLETTING.
         A.   LESSOR'S CONSENT REQUIRED.  Lessee shall not, either voluntarily
              or by operation of law, assign, sell, encumber, pledge or
              otherwise transfer all or any part of Lessee's leasehold estate
              hereunder or permit the Premises to be occupied by anyone other
              than Lessee or Lessee's employees', or sublet the Premises or any
              portion thereof, without Lessor's prior written consent in each
              instance, which consent may not unreasonably be withheld by
              Lessor.  In exercising its reasonable discretion, Lessor may
              consider all commercially relevant factors involved in the
              leasing, subleasing or assignment of the space, including, but
              not limited to, the following: (i) the credit worthiness and
              financial stability of the prospective assignee or sublessee;
              (ii) the projected gross sales of such assignee or sublesee;
              (iii) the compatibility of the prospective assignee or sublessee
              with Lessor, its property manager, and other tenants in the
              Complex; (iv) the references from prior landlords of such
              prospective sublessee or assignee; (v) the past history of such
              sublessee or assignee with respect to involvement in litigation
              and bankruptcy proceedings; (vi) whether the proposed use of the
              Premises by the prospective sublessee or assignee falls within
              the use permitted under Paragraph 6; (vii) whether the proposed
              use is suitable and in keeping with the ambience and tone of the
              Complex; and (viii) the impact of said sublessee or assignee and
              the proposed use of the Premises on pedestrian and vehicular
              traffic and parking facilities.  The presence of one negative
              factor enumerated above shall be deemed reasonable justification
              for Lessor's withholding consent.  Lessee shall provide Lessor
              with prior notice of any proposed assignment or sublease as
              provided in ▇▇▇▇▇▇▇▇▇ ▇▇▇.  Consent by Lessor to one or more
              assignments of this lease or to one or more subletting of the
              Premises shall not operate to exhaust Lessor's rights under this
              Paragraph.  The voluntary or other surrender of this Lease by
              Lessee or a mutual cancellation hereof shall not work a merger,
              and shall, at the option of Lessor, terminate all or any existing
              subleases or subtenancies or shall
                                          12
              operate as an assignment to Lessor of such subleases or
              subtenancies.  If Lessee is a corporation, or is an
              unincorporated association or partnership, the transfer,
              assignment or hypothecation of any stock or interest in such
              corporation, association or partnership in the aggregate in
              excess of FORTY-NINE percent (49%) shall be deemed an assignment
              within the meaning and provisions of this Article, EXCEPT THAT
              LESSEE MAY TRANSFER ITS STOCK TO AN AFFILIATED CORPORATION
              WITHOUT THE CONSENT OF LESSOR.  LESSEE SHALL PROVIDE LESSOR WITH
              WRITTEN NOTICE IN SUCH EVENT OF TRANSFER TO SAID AFFILIATED
              CORPORATION. LESSEE MAY, WITHOUT LESSOR'S PRIOR WRITTEN CONSENT,
              BUT WITH WRITTEN NOTICE, SUBLET THE PREMISES AND/OR ASSIGN THE
              LEASE TO (I) ANY AFFILIATE OF LESSEE; (II) A SUCCESSOR
              CORPORATION RELATED TO LESSEE BY MERGER, CONSOLIDATION,
              REORGANIZATION OR GOVERNMENT ACTION: AND/OR (III) A PURCHASER OF
              SUBSTANTIALLY ALL OF THE ASSETS OF LESSEE; ANY SUCH TRANSFER
              BEING REFERRED TO HEREIN AS AN "AFFILIATE TRANSFER" SO LONG AS
              SUCH AFFILIATE, SUCCESSOR OR PURCHASER AGREES IN WRITING TO
              GUARANTEE THE PERFORMANCE OF LESSEE UNDER THIS LEASE.  In
              addition to the rent and all monetary sums normally payable to
              Lessor by Lessee hereunder, Lessee agrees to further pay to
              Lessor, immediately upon receipt by Lessee, and as additional
              rent, one hundred percent (100%) of any monetary consideration
              which Lessee would be entitled to receive under any sublease or
              assignment permitted herein.  LESSEE SHALL BE ENTITLED TO RECOVER
              ITS DIRECT THIRD-PARTY DOCUMENTED EXPENSES OF LEASE COMMISSIONS,
              ADVERTISING, TENANT IMPROVEMENTS AND LEGAL FEES (LEGAL FEES NOT
              TO EXCEED $5,000) PRIOR TO REMITTING TO LESSOR ALL RENT IN EXCESS
              OF THE RENT AND OTHER SUMS DUE UNDER THIS LEASE.
         B.   NOTICE TO LESSOR. If Lessee desires at any time to assign this
              Lease or to sublet the Premises or any portion thereof, it shall
              first notify Lessor of its desire to do so and shall submit in
              writing to Lessor (i) the name of the proposed sublessee or
              assignee; (ii) the nature of the proposed sublessee's or
              assignee's business to be carried on in the Premises; (iii) the
              terms and provisions of the proposed sublease or assignment; and
              (iv) such reasonable financial information concerning the
              proposed sublessee or assignee as Lessor may need to make a
              prudent and considered decision.
         C.   LESSEE NOT RELEASED.  No subletting or assignment, even with the
              written consent of Lessor, shall relieve Lessee of its obligation
              to pay the rent and perform all of the other obligation to be
              performed by Lessee hereunder.  Lessee shall indemnify and hold
              Lessor harmless from any and all claims, damages, liability and
              expenses, including reasonably attorneys' fees and costs arising
              out of any claims by brokers or others for commission or finder's
              fees with respect to any subletting or assignment by Lessee.  The
              acceptance of rent by Lessor from any other person shall not be
              deemed to be a waiver by Lessor from any provision of this Lease
              or to be a consent to any assignment or subletting.  Lessee
              immediately and irrevocably assigns to Lessor, as security for
              Lessee's obligations under this Lease, all rent from any
              subletting, and Lessor, as assignee and attorney in fact for
              Lessee or receiver for Lessee appointed on Lessor's application
              may collect such rent and apply it toward Lessee's obligations
              under this Lease, except that, until the occurrence of any act of
              default by Lessee, Lessee shall have the right to collect such
              rent.
         D.   INVOLUNTARY ASSIGNMENT.  No interest of Lessee in this Lease
              shall be assignable by operation of law.  Without liability
              limiting the foregoing, each of the following acts shall be
              considered an involuntary assignment:
              i.   Transfer of this Lease by testacy or intestacy;
              ii.  If Lessee is or becomes bankrupt or insolvent, makes an
                   assignment for the benefit or creditors, or institutes a
                   proceeding under the Bankruptcy Act in which Lessee is the
                   bankrupt; or, if Lessee is a partnership or consists of more
                   than one person or entity; if any general partner of the
                   partnership or other person or entity is or becomes bankrupt
                   or insolvent, or makes an assignment for the benefit of
                   creditors;
                                          13
         iii. The appointment of a trustee or receiver to take possession of
              substantially all of Lessee's assets located at the Premises or
              of Lessee's interest in this Lease, where possession is not
              restored to Lessee within thirty (30) days, or
         iv.  The attachment, execution or other judicial seizure of
              substantially all of Lessee's assets located at the Premises or
              of Lessee's interest in this Lease, where seizure is not
              discharged within thirty (30) days.
         An involuntary assignment shall constitute a default by Lessee and
         Lessor shall have the right to elect to terminate this Lease, in which
         case this Lease shall not be treated as an asset of Lessee.
    E.   LESSEE TO REIMBURSE FOR EXPENSES.  Lessee agrees to reimburse Lessor
         upon demand for Lessor's reasonable costs and attorney's fees (without
         limitation) incurred in conjunction with the processing, investigation
         and documentation of any requested assignment, subletting, transfer,
         involuntary assignment, change of ownership or hypothecation of this
         Lease or Lessee's interest in and to the Premises, regardless of
         whether any request actually results in a permitted assignment,
         sublease, or other transfer.
22. PARKING CHARGES. Lessee agrees to pay upon demand, based on its percent of
    occupancy of the entire Premises, its pro-rata share of any parking
    charges, surcharges, or any other cost hereafter levied or assessed by
    local, state or federal governmental agencies in connection with the use of
    the parking facilities serving the Premises, including, without limitation,
    parking surcharge imposed by or under the authority of the Federal
    Environmental Protection Agency.
23. INSOLVENCY OR BANKRUPTCY.  Either (a) the appointment of a receiver to take
    possession of all or substantially all of the assets of Lessee, or (b) a
    general assignment by Lessee for the benefit of creditors. Upon the
    happening of any such event, this Lease shall terminate ten (10) days after
    written notice of termination from Lessor to Lessee.  This section is to be
    applied consistent with applicable state and federal law in effect at the
    time such event occurs.
24. LESSOR LOAN OR SALE. Lessee agrees, promptly following request by Lessor,
    to (a) execute and deliver to Lessor any documents, including estoppel
    certificates presented to Lessee by Lessor, (i) certifying that this Lease
    is unmodified and in full force and effect, or, if modified, stating the
    nature of such modification and certifying that this Lease, as so modified,
    is in full force and effect and the date to which the rent and other
    charges are paid in advance, if any, and (ii) acknowledging that there are
    not, to Lessee knowledge, any uncured defaults on the part of Lessor
    hereunder, and (iii) evidencing the status of the Lease as may be required
    either by a lender making a loan to Lessor, to be secured by deed of trust
    or mortgage covering the Premises, or a purchase of the Premises from
    Lessor, and (b) to deliver to Lessor the current financial statements of
    Lessee with an option of a certified public accountant, including a balance
    sheet and profit and loss statement, for the current fiscal year and the
    two immediately prior fiscal years, all prepared in accordance with general
    accepted accounting principles consistently applied. Lessee's failure to
    deliver an estoppel certificate within FIVE (5) BUSINESS days following
    such request shall constitute a default under this Lease and shall be
    conclusive upon Lessee that this Lease is in full force and effect and has
    not been modified except as may be represented by Lessor.  If Lessee fails
    to deliver the estoppel certificate within the FIVE (5) BUSINESS days,
    Lessee irrevocably constitutes and appoints Lessor as its special attorney-
    in-fact to execute and deliver the certificate to any third party.
25. SURRENDER OF LEASE. The voluntary or other surrender of this Lease by
    Lessee, or a mutual cancellation thereof, shall not work a merger nor
    relieve Lessee of any of Lessee's obligations under this Lease, and shall,
    at the option of Lessor, terminate all or any existing subleases or
    subtenancies, or may, at the option of Lessor, operate as an assignment to
    him or any or all such subleases or subtenancies.
                                          14
26. ATTORNEYS' FEES.  If, for any reason, any suit be initiated to enforce any
    provision of this Lease, the prevailing party shall be entitled to legal
    costs, expert witness expenses and reasonable attorneys' fees as fixed by
    the court.
27. NOTICES.  All notices to be given to Lessee may be given in writing,
    personally or by depositing the same in the United States mail, postage
    prepaid, and addressed to Lessee at the said Premises, whether or not
    Lessee has departed from, abandoned or vacated the Premises.  Any notice or
    document required or permitted by this Lease to be given Lessor shall be
    addressed to Lessor at the address set forth below, or at such other
    address as it may have theretofore specified by notice delivered in
    accordance herewith:
    Lessor:  WDT-SHOREWAY
             ▇▇▇ ▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇ ▇▇
             Post Office Box 10098
             Palo Alto, California 94303-0854
    Lessee:  DOMESTIC AUTOMATION COMPANY
             ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇.  ▇▇▇▇▇ ▇▇▇▇
             ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇
28. TRANSFER OF SECURITY.  If any security be given by Lessee to secure the
    faithful performance of all or any of the covenants of this Lease on the
    part of Lessee, Lessor may transfer and/or deliver the security, as such,
    to the purchase of the reversion, in the event that the reversion be sold,
    and thereupon Lessor shall be discharged from any further liability in
    reference thereto, upon the assumption IN WRITING by such transferee of
    Lessor's obligations under this Lease.
29. WAIVER.  The waiver by Lessor or Lessee of any breach of any term, covenant
    or condition herein contained shall not be deemed to be a waiver of such
    term, covenant, or condition herein contained.  The subsequent acceptance
    of rent hereunder by Lessor shall not be deemed to be a waiver of any
    preceding breach by Lessee of any term, covenant, or condition of this
    Lease, other than the failure of Lessee to pay the particular rental so
    accepted, regardless of Lessor's knowledge of such preceding breach at the
    time of acceptance of such rent.
30. HOLDING OVER.  Any holding over after the expiration of the term or any
    extension thereof, with the consent of Lessor, shall be construed to be a
    tenancy from month-to-month, at a rental of one and one-half times the
    previous month's rental rate per month, and shall otherwise be on the terms
    and conditions herein specified, so far as applicable.
32. LIMITATION ON LESSOR'S LIABILITY. If Lessor is in default of this Lease,
    and as a consequence Lessee recovers a money judgement against Lessor, the
    judgement shall be satisfied only out of the proceeds of sale received on
    execution of the judgement and levy against the right, title, and interest
    of Lessor in the Premises, or in the building, other improvements, and land
    of which the Premises are part, and out of rent or other income from such
    real property receivable by Lessor or out of the consideration received by
    Lessor from the sale or other disposition of all or any part of Lessor's
    right, title, and interest in the Premises or in the building, other
    improvements, and land of which the Premises are part.  Neither Lessor nor
    any of the partners comprising the partnership or officers of the
    corporation designated as Lessor shall be personally liable for any
    deficiency.
                                          15
33. MISCELLANEOUS.
    A.   Time is of the essence of this Lease, and of each and all of its
         provisions.
    B.   The term "Building" shall mean the building in which the Premises arc
         situated.
    C.   If the Building is leased to more than one tenant, then each such
         tenant, its agents, officers, employees and invitees, shall have the
         non-exclusive right (in conjunction with the use of the part of the
         building leased to such tenant) to make reasonable use of any
         driveways, sidewalks and parking area located on the parcel of land on
         which the Building is situated, except such parking area as may from
         time to time be leased for exclusive use by other tenant(s).
    D.   Lessee's such reasonable use of parking area shall not exceed that
         percent of the total parking areas which is equal to the ratio which
         floor space of the Premises bears to floor space of the Building.*
    E.   The term "assign" shall include the term "transfer".
    F.   The invalidity or unenforceability of any provision of this Lease
         shall not affect the validity or enforceability of the remainder of
         this Lease.
    G.   All parties hereto have equally participated in the preparation of
         this Lease.
    H.   The headings and title to the paragraphs of this Lease are not a part
         of this Lease and shall have no effect upon the construction or
         interpretation of any part thereof.
    I.   Lessor has made no representation(s) whatsoever to Lessee (express or
         implied) except as may be expressly stated in writing in this Lease
         instrument.
    J.   This instrument contains all of the agreement and conditions made
         between the parties hereto, and may not be modified orally or in any
         other manner than by agreement in writing, signed by all of the
         parties hereto or their respective successors in interest.
    K.   It is understood and agreed that the remedies herein given to Lessor
         shall be cumulative, and the exercise of any open remedy by Lessor
         shall not be to the exclusion of any other remedy.
    L.   The covenants and conditions herein contained shall, subject to the
         provisions as to assignment, apply to and bind the heirs, successors,
         executors, administrators and assigns of all the parties hereto; and
         all of the parties hereto shall jointly and severally be liable
         hereunder.
    M.   This Lease has been negotiated by the parties hereto and the language
         hereof shall not be construed for or against either party.
    N.   All exhibits to which reference is made are deemed incorporated into
         this Lease, whether or not actually attached.
    0.   All provisions, whether covenants or conditions, on the part of Lessee
         shall be deemed to be both covenants and conditions.
    *    Lessee shall have the use of 76 parking spaces as shown on Exhibit C.
IN WITNESS WHEREOF, Lessor and Lessee have executed this Lease on the date
first above-written
LESSOR:                           LESSEE:
WDT-SHOREWAY                      DOMESTIC AUTOMATION COMPANY
By: /S/  [signature]                   By:  /S/ [signature]
    ----------------------------       ---------------------------
               GENERAL PARTNER
                                          ▇▇
▇▇▇ ▇▇▇▇▇▇▇▇
                               ▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇
                                ▇▇▇ ▇▇▇▇▇▇,▇▇▇▇▇▇▇▇▇▇
                             [site plan graphic omitted]
                                     EXHIBIT "B"
Lessor shall provide a building shell which shall include all on-and off-site
work, the structure, windows, two sliding glass door systems and the main
transformer set in place with 208/480 V 3-phase power.
In addition to the building shell, Lessor hereby grants to Lessee an interior
improvement allowance for real property improvements to the demised premises to
be made by Lessor at Lessor's expense. Said cost of such real property shall
include all costs to construct the same as well as all associated architectural,
structural, Title XXIV consultant fees, developer's overhead, city and other
governmental fees and inspection service fees.  Said allowance shall be equal to
$561,600 ($25.00 psf x 22,464 sf).  Lessor agrees to provide up to an additional
$112,320 ($5.00 psf x 22,464 sf) for purposes of real property improvements.  In
the event the actual cost of such real property improvements is less than or
more than $561,600, the rent shall be adjusted by 2.25 cents for every $1.00
over or under $561,600; in no event, however, shall the adjustment exceed 11.25
cents ($5.00 psf x 2.25 cents).  For example, if the actual cost is $606,528
($27.00 psf) the monthly rent shall be increased by $1,011 (4.5 cents x 22,464
sf).  Said real property interior improvements shall not include "▇▇▇▇▇▇ 
▇▇▇▇▇▇" type partitions.
4/7/89
                       ADDENDUM TO THAT CERTAIN LEASE AGREEMENT
                BY AND BETWEEN DOMESTIC AUTOMATION COMPANY ("LESSEE")
                             AND WDT-SHOREWAY ("LESSOR")
                                 DATED APRIL 6, 1989
34. COMMENCEMENT OF LEASE TERM.  The term of this Lease shall commence the
    latter of (i) July 1, 1989, or (ii) substantial completion of the interior
    improvements as outlined in Exhibit "B".  Substantial completion shall mean
    Lessor's material completion of the improvements so that Lessee may occupy
    the Premises without material interference from Lessor's contractors.
    However, should the Lease and final plans be executed after April 29, 1989,
    or should Lessee, its employees, officers, contractors, agents or suppliers
    interfere with Lessor or its contractors in constructing the improvements
    as per Exhibit "B", then this Lease shall commence July 1, 1989.
    In the event Lessor is unable to complete the interior improvements as per
    Exhibit "B" by September 30, 1989, (acts of God, strikes, war or delays
    beyond Lessor's control excepted), Lessee shall have the right, by giving
    Lessor ten (10) days advance written notice, to terminate this Lease and
    all monies paid pursuant to the Lease by Lessee to Lessor shall be returned
    to Lessee.
    Within twenty-five (25) days from commencement of the term, Lessee shall
    deliver to Lessor a written "punch list" defining those items or areas
    requiring repair.  Lessor agrees to diligently prosecute such repair as
    soon as reasonably possible after receipt of Lessee's written "punch list".
35. RENT IN OPTION TO EXTEND TERM.  Base rent shall be calculated as follows
    for the extended terms: Lessee shall pay to Lessor a sum of ninety-five
    percent (95%) of the Fair Market Rent Value of the Premises at the time the
    extended term shall commence using surrounding, comparable space between
    Menlo Park (south) to San Mateo/▇▇▇▇▇▇ City (north) to determine said Fair
    Market Rental Value.  The parties shall have fifteen (15) days to make and
    agree on said base rental.
    If the parties are unable to agree on the minimum monthly base rent for the
    extended term within said fifteen (15) day period, then each party, within
    ten (10) days and by giving notice to the other party, shall appoint a
    licensed real estate appraiser (MAI) with at least five (5) years' full-
    time commercial appraisal experience in the area in which the Premises are
    located to appraise and set the minimum monthly rent for the Market Rental 
    Value formula specific in the above paragraph.  If a party does not appoint 
    an appraiser within ten (10) days after the other party has given notice of 
    the name of its appraiser, the single appraiser appointed shall be the sole
    appraiser and shall set the minimum monthly rent for the extended term. If 
    the two appraisers are appointed by the parties as stated in this paragraph,
    they shall meet promptly and attempt to set the minimum monthly rent for the
    extended term. If they are unable to agree within twenty (20) days after the
    second appraiser has been appointed, they shall elect a third appraiser 
    meeting the qualifications stated in this paragraph within ten (10) days 
    after the last day the two appraisers are given to set the minimum monthly 
    rent.  The cost of said appraisers shall be borne by Lessor and Lessee as 
    each appointed and divide equally the cost of the third appraiser.
    Within five (5) days after the selection of the third appraiser, a majority
    of the appraisers shall set the minimum monthly rent for the extended term.
    If a majority of the appraisers are unable to set the minimum monthly rent
    within the stipulated period of time, the three (3) appraisers shall be
    added together and their total divided by three (3); the resulting quotient
    shall be the minimum monthly rent for the Premises during the extended
    term.  Said minimum monthly rental as set by the appraisers shall be
    binding upon the parties hereto and in no event shall the rent be less than
    the rent paid in the last month prior to such extended term.  Lessee shall
    have no other right to extend the term beyond the two (2) extended terms
    herein granted.
                                          1
36. HAZARDOUS MATERIALS/USE OF PREMISES:
    A.   Lessee shall have no obligation to clean up, or to comply with any law
         regarding, or to reimburse, indemnify, defend, release or hold Lessor
         harmless with respect to, any hazardous materials or wastes discovered
         on the Premises which were not introduced into the Premises, or
         stored, disposed of or transported in or on the Premises, by Lessee
         its employees, agents or contractors.
    ▇.   ▇▇▇▇▇▇ hereby agrees to indemnify and hold Lessee harmless of and from
         any and all liability, claims, damages, losses or causes of action
         whatsoever by reason of any hazardous materials in, on or about the
         Premises prior to the Commencement Date.
    C.   If the Premises should become not reasonably suitable for Lessee's use
         for the purposes specified in Paragraph 6 of the Lease as a
         consequence of cessation of utilities (except for the actions or
         inactions of Lessee) and such cessation of utilities persist for three
         (3) business days after Lessor's receipt of written notice from
         Lessee), or the presence of hazardous or toxic materials or wastes in
         or about the Premises, the Building or the Project, so long as such
         hazardous materials were not introduced into the Premises, the
         Building or the Project by Tenant, its employees, agents, contractors
         or invitees (collectively, an "Interfering Event"), then Lessee shall
         be entitled to an abatement of rent to the extent that the Interfering
         Event interferes with or limits such use of the Premises by Tenant.
         If the Interfering Event cannot be corrected, or if the damage
         resulting therefrom cannot be repaired, so that the Premises will be
         reasonably suitable for Tenant's intended use within One Hundred
         Twenty (120) days following the occurrence or commencement of such
         Interfering Event, then Lessee shall have the right to terminate the
         Lease, by giving written notice to Landlord of its exercise of such
         right at any time after the expiration of said one hundred twenty
         (120) day period from such occurrence of such Interfering Event.
37.      EXPENSES.
         A.   In no event shall common area expenses include: (i) ground lease
              payments, (ii) mortgage payments, (iii) costs of capital
              improvements except as provided in the Lease, or (iv)
              depreciation of building service equipment.
         B.   Notwithstanding anything to the contrary contained in the Lease,
              in no event shall Lessee have any obligation to pay directly, or
              to reimburse Lessor for, all or any portion of any of the
              following claims, loesses, fees, charges, costs and expenses
              (collectively, "Costs"):
              i.   Costs occasioned by the act or omission, or any violation of
                   any applicable law, by Lessor or any other occupant of the
                   Building, or their respective agents, employees or
                   contractors;
              ii.  Cost occasioned by fire, windstorm or other casualty, or by
                   the exercise of the power of eminent domain;
              iii. Costs of correcting any construction defect in the Premises,
                   the Building, or because of any failure on the part of
                   Lessor or any other third party to comply with any or
                   underwriter's requirement, or with any applicable rule,
                   regulation, statute, ordinance, law or code affecting the
                   Premises, the Building as of the Commencement Date;
              iv.  Costs incurred to investigate the presence or suspected or
                   alleged presence of any hazardous or toxic materials or
                   wastes, or to respond to any claim of any contamination or
                   damage occurring because of any hazardous or toxic materials
                   or wastes, costs to remove any such materials or wastes from
                   the Building, and any judgments or other Costs incurred by
                   Lessor in connection with any exposure to or release of any
                   such materials or wastes, except to the extend cause by
                   Lessee's use, storage, generation or disposal of any such
                   material or waste.
                                          2
38. REPAIRS AND MAINTENANCE.  Lessee shall not be responsible for the
    performance or any cost of repair and maintenance: (i) necessitated by the
    acts or omissions of Lessor or its agents, employees or contractors; (ii)
    necessitated by the acts of other Lessees in the Building or the Project or
    their respective agents, employees or contractors; (iii) necessitated by
    the occurrence of any act of God or any insurable casualty or the exercise
    of the power of eminent domain; (iv) because of construction defects in the
    Premises, the Tenant Improvements, or the Building; (v) required as a
    consequence of any defect, whether latent or not, in the construction of
    the Premises, or the Building; (vi) arising form a failure to materially
    construct the Premises, the Tenant Improvements, or the Building in
    accordance with all law and any plans approved by Lessee; (vii) for which
    Lessor has a right of reimbursement from others; or (viii) which would
    constitute a capital expense, improvement or replacement under generally
    accepted accounting principles and all of the preceding shall be performed
    by Lessor, at its sole cost and expense, except as otherwise permitted or
    provided in the Lease.
39. EARLY ENTRY/ACCEPTANCE OF PREMISES.
    A.   Lessee and it agents and contractors shall be permitted to enter the
         Premises prior to the Commencement Date for the purpose of installing
         Lessee's trade fixtures and equipment, telephone equipment, security
         systems and cabling for computers.  Lessee shall also have access to
         the Premises for the purpose of moving in (but not operating)
         equipment that has been delivered for Lessee's use in the Premises,
         which equipment may be moved into a stored in an area within the
         Premise, designated by Lessor, in such a manner so as not to interfere
         with Lessor's construction of the Tenant Improvements.  In addition,
         Lessee or its agents may enter the Premises at any reasonable time
         prior to the Commencement Date for the purpose of inspecting the
         course of construction of the Tenant Improvements.  Any entry or
         installation work or equipment, by Lessee and its agents in the
         Premises pursuant to this paragraph shall (i) be undertaken at
         Lessee's sole risk, (ii) not interfere with or delay Lessor's work in
         the Premises, and (iii) not be deemed occupancy or possession of the
         Premises for purposes of the Lease.
    B.   Acceptance of Premises:
         i.   Notwithstanding anything herein or in the Lease to the contrary,
              Lessee's acceptance of the Premises (whether in writing or
              otherwise) shall not be deemed a waiver of Lessee's right to have
              all defects in materials, labor, design, construction and
              equipment repaired at Lessor's sole cost and expense.
         ii.  Lessee shall promptly notify Lessor in writing of any defect in
              construction or in the operation of any equipment (but not
              Lessee's trade fixtures or equipment installed in the Premises by
              Lessee at it sole expense) upon becoming aware of such defect,
              and Lessor shall promptly thereafter commence the cure of such
              defect and prosecute such cure to completion with due diligence
              at Lessor's sole cost and expense.
         iii. Effective upon completion of the Premises and all work to be
              performed by Landlord therein, Landlord does hereby warrant that
              the construction of the Premises any Tenant Improvements was
              performed in material accordance with the plans therefor in a
              good and workmanlike manner, and that all materials and equipment
              furnished materially conform to said plans and are new and
              otherwise of good quality.
                                          3
40. SUBORDINATION.  So long as Lessee is not in default under the Lease, Lessee
    shall have the right of quiet enjoyment of the Premises, subject to the
    terms of the Lease, without interruption or hindrance by Landlord or any
    other person claiming through or by Lessor.  Upon written request from
    Lessee, Lessor shall use its best efforts to obtain a written agreement
    from each holder of senior lien or senior security instrument (whether now
    or hereafter existing) affecting the Premises, recognizing Lessee's rights
    under the Lease and agreeing not to disturb Lessee's possession of the
    Premises under the Lease so long as Lessee is not in default hereunder.
41. RIGHT OF FIRST REFUSAL TO LEASE ADDITIONAL SPACE.
    A.   Lessor hereby grants to Lessee a right of first refusal (the "Right of
         First Refusal") to lease any space which becomes available in either
         of the buildings located at 75 and ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇,
         ▇▇▇▇▇▇▇▇▇▇ (the "Adjacent Space").  If Lessor proposes to lease, or
         grant a right of possession in, the Adjacent Space, or any portion
         thereof, to a third party, Lessor may do so only after first offering
         to lease the Adjacent space, or such portion thereof as Lessor
         proposes to lease to the third party, (the "Offered Adjacent Space")
         to Lessee o the terms and conditions set forth in this paragraph.
    B.   TERM OF FIRST RIGHT OF REFUSAL.  The term of this Right of First
         Refusal shall commence upon execution of the Lease and shall continue
         until the expiration or earlier termination of the lease considering
         any renewal periods.
    C.   NOTICE OF INTENT TO LEASE.  Landlord shall give written notice of its
         intent to lease, or grant a right of possession in, the Offered
         Adjacent Space to Lessee ("Lessor's Notice"). Lessor's Notice shall be
         delivered to Lessee in the manner specified in paragraph 27 of the
         Lease.  Lessor's Notice shall set forth the identity of the
         prospective lessee, the form of lease Lessor intends to use (in the
         event it is different than the form used herein), and the following
         basic business terms upon which Landlord is willing to lease the
         Offered Adjacent Space to the prospective Lessee (collectively the
         "Basic Business Terms"): (i) the description of the offered Adjacent
         Space; (ii) the lease term; (iii) the interior improvements Landlord
         is willing to construct or that it will require to be constructed;
         (iv) the method of payment for such improvements; (v) the base rent
         for the initial term of the lease and the formula, if any, to be used
         to determine such rent (including, if applicable, Lessee's share of
         taxes, assessments, operating expenses, insurance costs, and the
         like); (vi) any option(s) to extend the lease term and the rent to be
         charged during such extension period; (vii) any option(s) to lease
         other space in the project and the rent and other terms of the lease
         to be consummated upon exercise of such option.
    D.   EXERCISE OF FIRST RIGHT OF REFUSAL.  Lessee may elect to exercise its
         First right of Refusal by giving Lessor written notice of such
         election on/or before the third (3rd) business day following actual
         receipt of Lessor's Notice.  Lessee's failure to give written notice
         of an election to exercise tits Right of First Refusal within the
         three (3) business day period shall be deemed a waiver of its Right of
         First Refusal with respect to the particular lease transaction and the
         proposed Lessee described in Lessor's Notice.  Lessee's waiver of its
         Right of First Refusal with respect to any particular proposed lease
         transaction, shall not be deemed a waiver of Lessee's right of First
         Refusal with respect to any other proposed lease transaction
         concerning the Adjacent Space or any other proposed lease transaction
         concerning the Offered Adjacent Space.
    E.   TERMS OF LEASE. Upon Lessee's exercise of the Right of First Refusal,
         Lessor shall lease to Lessee and Lessee shall lease from Lessor the
         Offered Adjacent Space on the Basic Business Terms stated in Lessor's
         Notice.  The parties also shall execute a written lease in the same
         form as the Lease, modified to incorporate the Basic Business Terms
         set forth in Lessor's Notice and to eliminate any terms of the Leases
         that are inconsistent with the Basic Business Terms.
                                          4
    ▇.   ▇▇▇▇▇▇'▇ RIGHT TO LEASE.  If Lessee does not indicate in writing its
         election to lease the Offered Adjacent Space in accordance with
         subparagraph D within the allowed time period, Lessor thereafter shall
         have the right to lease the Offered Adjacent Space to the prospective
         Lessee identified in Lessor's Notice; provided (i) the lease is
         materially ("materially" shall man that the rent is at least ninety-
         five percent (95%) of the rent or tenant improvements allowance so
         stated in the written notice to Lessor) consummated on the same Basic
         Business Terms set forth in Lessor's Notice and on such other terms as
         are contained in the form of lease included with Lessor's Notice
         consummated on/or before the ninety (90) days following delivery of
         Lessor's Notice.  After expiration of the ninety (90) day period, any
         lease transaction shall be deemed a new determination by Lessor to
         lease the Offered Adjacent Space and no interest in the Offered
         Adjacent Space may be consummated, unless Lessee is first offered the
         right to lease such space in accordance with the provisions of this
         Right of First Refusal.
42. BROKERAGE COMMISSION.  Lessor expressly acknowledges and agrees that it
    shall be solely liable for the payment of any and all brokers' commissions
    and/or finder's fees payable in connection with the execution of the Lease
    (including but not limited to any commission or fee due as set forth in any
    addendum attached to the Lease with regard thereto), and Lessee shall have
    no liability or obligation therefor.  Lessee hereby represents and warrants
    that it has not dealt with any other brokerage firm other than Cornish &
    ▇▇▇▇▇ Commercial.
43. SIGNAGE.  Lessee shall be entitled to place signage on the existing
    monument sign as well as on-building provided that Lessor shall grant its
    approval, which approval shall not be unreasonably withheld and further,
    provided that the Lessee has received all permits and approvals from all
    governmental agencies.  Lessee shall, upon the termination or earlier
    expiration of this Lease, remove all such signage and restore the affected
    area.
44. Lessor shall deliver the demised premises to Lessee with an interior
    ambient noise level in lessee's lobby of that approximately equal to the
    noise level in the lobby of Fox & ▇▇▇▇▇▇▇▇▇ (75 Shoreway, Suite 1000).
    Accepted and Agreed:               Accepted and Agreed:
    LESSEE                             LESSOR.
    By: /S/ [signature unreadable]     By: /S/ [signature unreadable]
        ---------------------------        ---------------------------
     Authorized Officer                General Partner
     DOMESTIC AUTOMATION               WDT-SHOREWAY
    Date: 5/4/89                       Date: 4/28/1989
          -------                            --------
                                          5
                                     ADDENDUM II
TO THAT CERTAIN LEASE DATED APRIL 6, 1989 BY AND BETWEEN WDT-SHOREWAY, LESSOR,
AND DOMESTIC AUTOMATION COMPANY, LESSEE.
To that certain Lease, the following wording is added:
45. It is Lessee's desire to occupy plus or minus 22,272 additional square feet 
    of space located at the rear of ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇ 
    and plus or minus 6,150 additional square feet of space directly contiguous 
    to Lessee's current space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇ 
    (see Exhibit C).
46. USE OF PREMISES.
    The premises shall be used exclusively for the purpose of general
    office/research and development, warehousing normal and customary to the
    electronic industry.
47. TERM.
    This lease term shall be for forty-five (45) months, commencing October 1,
    1990, and ending June 30, 1994.
48. OPTION TO EXTEND TERM.
    A.   Lessee shall have the option to extend the term on all the provisions
    contained in this Lease for two (2) five (5) year periods with the monthly
    rent for the option period at 95% of fair market rent for the premises at
    the commencement of the option period in question, provided that:
      (a)     Lessee has given to Lessor written notice of exercise of that
              option ("option notice") at least six (6) months before
              expiration of the initial term or extended term(s) as the case
              may be.
      (b)     Lessee is not in default in the performance of any of the terms
              and conditions of the Lease on the date of giving the option
              notice, and Lessee is not in default on the date that the
              extended term is to commence.
         In the event Lessor and Lessee cannot agree on the fair market rental 
    rate for the premises within thirty (30) days after Lessee delivers to 
    Lessor its written notice of exercise of the option, the fair market rental 
    rate for the Premises during the option period in question shall be 
    determined by the appraisal procedures set for the in subparagraph B below.
    B.   Within thirty (30) days after the expiration of said thirty (30) day
    period, Lessor and Lessee shall jointly appoint a disinterested, qualified
    real estate appraiser for the purpose of determining the fair market rental
    rate for the premises at the commencement of the option period, or failing
    this joint action, shall each separately designate a disinterested
    qualified real estate appraiser and, within fifteen (15) days after their
    appointment, the two (2) designated appraisers shall jointly designate a
    third similarly disinterested qualified real estate appraiser.  Failure of
    either Lessor or Lessee to appoint an appraiser within the time allowed
    shall be deemed equivalent to appointing the
    appraiser appointed by the other party.  If, within fifteen (15) days after
    their appointment, the two (2) designated appraisers shall not be able to
    agree on a third appraiser, the third appraiser shall be appointed by the
    American Institute of Real Estate Appraisers. Each of the appraisers
    appointed shall be either a MAI appraiser affiliated with the American
    Institute of Real Estate, or an ASA appraiser affiliated with the American
    Society of Real Estate Appraisers or an SREA appraiser affiliated with the
    Society of Real Estate Appraisers, and shall have at least five (5) years
    experience in real estate appraising and shall be familiar with real estate
    values and appraisal procedures in the County of San Mateo, California.  On
    the first working day after the commencement of the fifth (5th) calendar
    month prior to the then expiration date of the term of this Lease, the
    three (3) appraisers shall get together with the Lessor's attorney, unless
    a different time or place is mutually agreed upon by the parties.  At such
    meeting, the three (3) appraisers shall deliver to Lessor and Lessee sealed
    envelopes, their appraisals of the fair market rental rate for the premises
    at the commencement of the option period in question.  The appraisal
    farthest from the median of the three appraisals shall be disregarded and
    the mathematical average of the remaining two appraisals shall be deemed to
    be the fair market rental rate for the premises and shall be binding and
    conclusive.  Lessor and Lessee shall each pay the cost and expenses of the
    appraiser appointed by it, and shall share equally the expenses and costs
    of the third appraiser.  After the determination of the fair market rental
    rate pursuant to the foregoing appraisal procedures, but prior to four (4)
    months prior to the termination date, of this Lease, Tenant may withdraw
    its election to extend the term of this Lease.
49. RENT
    Lessee shall pay Lessor rent for the premises the first day of each month
    without deduction or offset, prior notice, or demand, at such place as may
    be designated from time to time by Lessor as follows:
    ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
                                                     Monthly
                                                     -------
    Term               Size   Rent/Square Foot       Rent Due
    ----               ----   ----------------       --------
    0-6 months        5,525    $1.10 NNN/Month     $ 6,078.00
    7-9 months       11,050    $1.10 NNN/Month     $12,155.00
    10-12 months     19,000    $1.10 NNN/Month     $20,900.00
    13-45 months     22,272    $1.10 NNN/Month     $24,499.00
    ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
                                                     Monthly
                                                     -------
    Term               Size   Rent/Square Foot       Rent Due
    ----               ----   ----------------       --------
    0-45              6,150    $.60 NNN/Month      $3,690.00
50. TENANT IMPROVEMENTS
    ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇: Any tenant improvements up to $10.00/square foot
    ($222,720.00) shall be provided by Lessor and be amortized at 12% over the
    remaining term of the lease to be paid by Lessee monthly.
    ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇: (6,150 square feet) If desire during the lease term, any
    tenant improvements up to $25.00 per square foot ($153,750.00) shall be
    provided by Lessor and be amortized at 12% interest over the remaining term
    of the lease to be paid by Lessee monthly.
51. OPERATING EXPENSES
    Operating expenses shall remain the same as the base lease.
52. PARKING
    The parking ratio shall be 4/1000.
53. RIGHT OF SECOND REFUSAL
    Lessee shall have a right of second refusal on any adjacent space and shall
    have a right of second refusal to purchase the property.
54. NOTIFICATION BY LESSOR
    Lessor shall use best effort to notify Lessee of any space coming available
    within the project prior to marketing such space.
55. BROKERAGE FEES
    Lessor shall be solely responsible for leasing commission due Blickman
    Turkus and Cornish & ▇▇▇▇▇ per a separate agreement.
All other terms and conditions of the base lease remain in full force and
effect.
AGREED AND ACCEPTED:
LESSOR                            LESSEE
WDT - SHOREWAY                    DOMESTIC AUTOMATION COMPANY
/S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇. III          /S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇
------------------------------    ----------------------
▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III              Authorized Officer
Date: 9/20/90                     Date: 13 September 1990
    --------------------------         ------------------
EXHIBIT C                                         HIGHWAY 101
                          WDT SHOREWAY ▇▇-▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
                            ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇ ALB 8/27/90
                             [site plan graphic omitted]
                                     ADDENDUM III
TO THAT CERTAIN LEASE DATED APRIL 6, 1989, BY AND BETWEEN WDT - SHOREWAY, 
LESSOR, AND DOMESTIC AUTOMATION COMPANY, LESSEE.
To that certain Lease the following wording is added:
56. TENANT IMPROVEMENTS
    Referral is made to Paragraph 50 (Tenant Improvements) of Addendum II.
    Lessor, at the request and approval of Lessee, has installed a display room
    at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇.  The total cost for installation of said room is
    $29,309,00.
    Balance of tenant improvements at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇ remaining under terms
    of the lease is: $124,441.00.
    An additional $29,309.00 in tenant improvements has been provided by
    Lessor, which will result in an additional monthly rent assessment of
    $858.00 over the term of the lease.  Lessee shall include the additional
    assessment in the payment of his base rent which is due on the first day of
    each month commencing January 1, 1991.  All late fees outlined in Paragraph
    Three (3) of the base Lease shall be applicable to the tenant improvement
    reimbursement payment also.
AGREED AND ACCEPTED:
LESSOR                            LESSEE
WDT - SHOREWAY                    DOMESTIC AUTOMATION COMPANY
/S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III          /S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇
------------------------          ------------------
▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III              ▇▇▇▇▇▇ ▇. ▇▇▇▇
General Partner                   Vice President, Finance
Date: 1/15/91                     Date: 1/15/91
    -------------------                --------------
                                 ADDENDUM IV-REVISED
                              (SUPERSEDES ADDENDUM III)
TO THAT CERTAIN LEASE DATED APRIL 6, 1989, BY AND BETWEEN WDT - SHOREWAY,
LESSOR, AND DOMESTIC AUTOMATION COMPANY, LESSEE.
To that certain Lease the following wording is added:
56. TENANT IMPROVEMENTS
    Referral is made to Paragraph 50 (TENANT IMPROVEMENTS) of Addendum II.
    Lessor, at the request and approval of Lessee, has installed improvements
    (including, but not limited to display room at 125 Shoreway and
    communications trench with conduit and other special improvements at ▇▇
    ▇▇▇▇▇▇▇▇ ▇▇▇▇).  The total cost to date for installation of said
    improvements is $105,143.00.
    This additional $105,143.00 in tenant improvements has been provided by
    Lessor, and will result in an additional monthly rent assessment of
    $3,202.19 over the term of the lease.  Lessee shall include the additional
    assessment in the payment of his base rent which is due on the first day of
    each month commencing March 1, 1991.  All late fees outlined in Paragraph
    Three (3) of the base Lease shall be applicable to the tenant improvement
    reimbursement payment also.
All other terms and conditions of the base lease remain in full force and
effect.
AGREED AND ACCEPTED:
LESSOR                            LESSEE
WDT - SHOREWAY                    DOMESTIC AUTOMATION COMPANY
/S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III          /S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇
-------------------------         ------------------------
▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III              ▇▇▇▇▇▇ ▇. ▇▇▇▇
General Partner                   Vice President, Finance
Date: 3/19/91                     Date: 3/11/91
    -------------------                -------------------
                                ADDENDUM V - (REVISED)
                               (SUPERSEDES ADDENDUM IV)
TO THAT CERTAIN LEASE DATED APRIL 6,1989, BY AND BETWEEN WDT -
SHOREWAY, LESSOR, AND DOMESTIC AUTOMATION COMPANY, LESSEE.
To that certain Lease the following wording is added:
57. TENANT IMPROVEMENTS
    Referral is made to Paragraph 50 (TENANT IMPROVEMENTS) of Addendum II.
    Lessor, at the request and approval of Lessee, has installed improvements
    (including, but not limited to display room at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇ and
    communications trench with conduit and other special improvements at ▇▇
    ▇▇▇▇▇▇▇▇ ▇▇▇▇).  The total cost to date for installation of said
    improvements is $117,016.00.
    This new total of $117,016.00 in tenant improvements has been provided by
    Lessor, and will result in an additional monthly rent assessment of
    $3,587.69 over the term of the lease.  Lessee shall include the additional
    assessment in the payment of his base rent which is due on the first day of
    each month commencing June 1, 1991.  All late fees outlined in Paragraph
    Three (3) of the base Lease shall be applicable to the tenant improvement
    reimbursement payment also.
All other terms and conditions of the base Lease remain in full force and
effect.
AGREED AND ACCEPTED:
LESSOR                            LESSEE
WDT-SHOREWAY                      DOMESTIC AUTOMATION COMPANY
/S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇                    /S/ ▇▇▇▇▇▇ ▇ ▇▇▇▇
-------------------                    -----------------
▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III                   ▇▇▇▇▇▇ ▇. ▇▇▇▇
General Partner                        Vice President, Finance
Date: 5/31/91                          Date: 5/21/91
     -------------                          -------------
                                     ADDENDUM VI
TO THAT CERTAIN LEASE DATED APRIL 6, 1989, BY AND BETWEEN WDT -
SHOREWAY, LESSOR AND DOMESTIC AUTOMATION COMPANY, LESSEE.
To that certain Lease the following wording is added:
58. TERMINATION OF LEASE FOR PARTIAL SPACE
    Lessor and Lessee hereby agree to terminate that portion of the lease of  
    plus or minus 6,150 square feet of warehouse space as shown on attached 
    Exhibit D, at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇.
59. RENT FOR REMAINING SPACE (Superseded by Addendum VII)
All other terms and conditions of the base Lease remain in full
force and effect.
AGREED AND ACCEPTED:
LESSOR                                 LESSEE
WDT - SHOREWAY                              DOMESTIC AUTOMATION COMPANY
/S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III               /S/ ▇▇▇▇ ▇. ▇▇▇▇
------------------------               --------------------------
▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III                   Authorized Officer
General Partner
Date: 10/14/92                              Date: 9 Oct 92
     ------------------                          ----------------
                                      EXHIBIT D
                                     WDT SHOREWAY
                                 ▇▇-▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
                               ▇▇▇ ▇▇▇▇▇▇, ▇▇  8/27/90
                             [site plan graphic omitted]
                                     ADDENDUM VII
To that certain Lease dated April 6, 1989, by and between WDT-Shoreway, Lessor,
and Domestic Automation Company, Lessee.
Both Lessor and Lessee hereby agree to amend that certain Lease as follows:
    60.  RENT FOR REMAINING SPACE
    Rent for plus or minus 5,007 square feet of warehouse space now occupied by 
    Domestic Automation in that certain building commonly known as 125 Shoreway 
    shall be adjusted for the remainder of the Lease term as follows: 
    commencing October 1, 1992, rent shall be reduced from $1.20/sf/mo/NNN to 
    $.80/sf/mo/NNN.
    The total monthly rent payment made by Domestic Automation commencing
    October 1, 1992 shall be as follows:
    125 SHOREWAY
    Office Space @ $1.20/sf/mo/NNN    +17,457 sq ft   $ 20,948.00
    Warehouse Space @ $.80/sf/mo/NNN  + 5,007 sq ft      4,005.00
    Additional Rent Assessed-TI's                        1,585.00
    Additional Rent Assessed-TI's                          858.00
    Total Rent, 125 Shoreway                          $ 27,396.00
    75 SHOREWAY
    Office Space @ $ 1.10/sf/mo/NNN   +22,272 sf ft   $24,499.00
    Additional Rent Assessed-TI's                       2,729.69
    Total Rent, 75 Shoreway                           $27,228.69
    TOTAL MONTHLY RENT PAYMENT:                       $54,624.69
    All other terms and conditions of the Lease shall remain in full force and
effect.
AGREED AND ACCEPTED:
Lessor:                                Lessee:
WDT-SHOREWAY                           DOMESTIC AUTOMATION COMPANY
/S/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III                    /S/ ▇▇▇▇ ▇. ▇▇▇▇
------------------------               ----------------------------
▇▇▇▇▇▇ ▇. ▇▇▇▇▇, III                   ▇▇▇▇ ▇. ▇▇▇▇
General Partner                        Chairman & CEO
    Date: 10/5/92                      Date: 1 OCT 92
         --------------                     -----------------------
                          FIRST AMENDMENT TO LEASE AGREEMENT
    This First Amendment to Lease Agreement ("Amendment") is effective as of 
July 1, 1994 (the "Effective Date") by and between WDT-Shoreway, as Lessor, 
and CellNet Data Systems, Inc. (formerly Domestic Automation Company) as 
Lessee who agree as follows:
    1.  RECITALS: This Agreement is entered into with respect to the following
facts and objectives:
         A.  Lessor and Lessee entered into that certain written lease
agreement dated April 6, 1989 for the property commonly known as ▇▇▇ ▇▇▇▇▇▇▇▇
▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇, as amended by that certain Addendum To
That Certain Lease Agreement By And Between Domestic Automation Company and WDT
-Shoreway Dated April 6, 1989, as amended by that certain Addendum 11, executed
on September 20, 1994 and September 13, 1994, as amended by that certain
Addendum 11, executed on January 1, 1991 and January 15 1991 , as amended by
that certain Addendum IV - Revised, executed on March 19,1991 and March 11 ,
1991 and May 21, 1991, as amended by that certain Addendum VI, executed on
October 14, 1992 and October 9, 1992 and as further amended by that certain
Addendum VII, executed on October 5, 1992 and October 1, 1992 (collectively, the
"Lease").
         B.  Lessee has changed its name from Domestic Automation Company to
CellNet Data Systems, Inc. Lessor and Lessee now desire to change the name of
Lessee to CellNet Data Systems, Inc., a California corporation, to reflect said
change.
         ▇.  ▇▇▇▇▇▇ now further desires to lease to Lessee and Lessee now
desires to lease from Lessor that certain approximately six thousand one hundred
fifty (6,150) square feet of warehouse space located at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇
▇▇▇▇▇▇ (the "Additional Space"), California which space Lessee formerly leased
from Lessor pursuant to the Lease and as to which space Lessee and Lessor
terminated the Lease pursuant to Addendum VI.
         ▇.  ▇▇▇▇▇▇ and Lessee now further desire to extend the term of the
Lease for a term of four (4) years, commencing on July 1, 1994, and expiring on
June 30, 1998.
         ▇.  ▇▇▇▇▇▇ now further desires to provide to Lessee an allowance of
Two Hundred Thousand Dollars ($200,000) to construct mutually acceptable
improvements in the Premises on the terms and conditions set forth below.
         ▇.  ▇▇▇▇▇▇ further desires to grant to Lessee an option to lease that
certain approximately fifteen thousand two hundred ninety six (15,296) square
feet of space presently leased and occupied by Fox & ▇▇▇▇▇▇▇▇▇ located at ▇▇
▇▇▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇ and as designated as option Area - D on EXHIBIT
C attached hereto ("Option Area - D") on the terms and conditions set forth
below.
    2.  NAME CHANGE: The name of Lessee is changed from Domestic Automation
Company to CellNet Data Systems, Inc., a California corporation.
    3.  ADDITIONAL SPACE: Lessor hereby leases to Lessee and Lessee hereby
leases from Lessor the Additional Space.  Accordingly, the Premises shall mean
the following:
         22,272 sq. ft of office space at ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
         17,457 sq, ft. of office space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
         5,007 sq. ft. of warehouse space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
         6,150 sq. ft. of warehouse space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
    4.  LEASE EXTENSION: The Lease term is hereby extended to June 30, 1998.
    5.  RENT: Rent, as described in Paragraph 3 of the Lease shall be as
follows:
         A.  Commencing on July 1, 1994 and continuing thereafter through June
30, 1997, monthly rent shall equal one and 10/100 dollars ($1.10) per square
foot of office space (I.E., Forty Three Thousand Seven Hundred Two
Dollars ($43,702) per month) and sixty cents ($0.60) per square foot of
warehouse space (I.E., Six Thousand Six Hundred Ninety Four Dollars ($6,694) per
month).
         B.  Commencing on July 1, 1997 and continuing thereafter until June
30, 1998, monthly rent shall equal One and 15/100 dollars ($1.15) per square
foot of office space (I.E., Forty Five Thousand Six Hundred Eighty Eight Dollars
($45,688) per month) and sixty five cents ($0.65) per square foot of warehouse
space (I.E. Seven Thousand Two Hundred Fifty Two Dollars ($7,252) per month).
    6.  TENANT IMPROVEMENT ALLOWANCE: Lessor shall provide to Lessee an 
allowance of Two Hundred Thousand Dollars ($200,000) (the "Allowance") to 
construct, on or before twenty-four (24) months following the Effective Date 
and/or during the first twenty-four (24) months of any extensions of the 
Lease, improvements in the Premises (including the Additional Space and any 
other space which Lessee in the future may lease from Lessor). Any 
improvements constructed using all of any portion of the Allowance shall be 
approved by Lessor, which approval shall not be unreasonably withheld or 
delayed.  If Lessee uses all or any portion of the Allowance in constructing 
said improvements, Lessee shall reimburse Lessor for the same in the form of 
monthly installments of additional rent.  The portion of the Allowance so 
used shall be amortized over the term of the Lease, including any extensions 
thereof, and shall bear interest at the rate of two percent per annum (2%) 
over the Bank of America Reference Rate, which rate shall be adjusted 
quarterly.  If Lessee terminates the Lease prior June 30, 1998, the 
unamortized balance of said funds shall be immediately due and payable.
    7.  OPTION TO LEASE: Lessor hereby grants to Lessee an option to lease (the
"Option") Option Area - D on the following terms and conditions.
         A.  Lessee may exercise the Option only by giving Landlord written 
notice ("Lessee's Notice") of its intention to do so on or before July 1, 
1996, but no earlier that July 1, 1995.
         B.  Immediately upon receipt of Lessee's Notice, Lessor shall, at
Lessor's sole cost and expense, use reasonable good faith efforts to negotiate
and execute a written lease termination agreement with Fox & ▇▇▇▇▇▇▇▇▇ for
Option Area - D, which agreement shall provide for the termination of such lease
and surrender of possession by the tenant thereunder so that Option Area - D
would be available no later that twelve (12) months after Lessors receipt of
Lessee's Notice (the "Delivery Period").  Notwithstanding the foregoing, unless
Lessee agrees otherwise, the lease for Option Area shall not commence sooner
than the later of (i) six (6) months following the date that Lessor receives
Lessee's Notice or (ii) three (3) months following the date that Fox & ▇▇▇▇▇▇▇▇▇
vacates Option Area -D (the "Option Commencement Period").
              (i)  If Lessor executes said lease termination agreement enabling
Lessor to deliver possession to Lessee during the Delivery Period, then Lessor
shall lease to Lessee and Lessee shall lease from Lessor Option Area - D by
executing an amendment to the Lease which amendment shall provide for the
following terms and conditions;
                   (a)  The definition of the Premises shall be amended to
provide that the Premises includes Option Area - D.
                   (b)  The term of the Lease shall be extened for a term of
five (5) years, commencing on the date that Option Area - D is delivered to
Lessee in the condition required pursuant to Subparagraph 7 (B) (i) (c) of this
Amendment (the "Option Area - D Commencement Date").
                   (c)  Rent for the Premises (including Option Area - D) shall
be as follows, as applicable:
                        (1)  Commencing on the Option Area - D Commencement
Date and continuing thereafter through and including June 30, 1997, monthly rent
shall equal One and 10/100 Dollars ($1.10) per square foot of office space and
Sixty Cents ($0.60) per square foot of warehouse space.
                        (2)  Commencing on July 1, 1997 and continuing
thereafter through and including June 30, 1998, monthly rent shall equal 
One and 15/100 Dollars ($1.15) per square foot of office space and 
Sixty-Five Cents ($.65) per square foot of warehouse space.
                        (3)  Commencing on July 1, 1998 and continuing
thereafter through and including June 30, 1999, monthly rent shall equal One and
18/100 ($1.18) per square foot of office space and Sixty Five Cents ($0.65) per
square foot of warehouse space.
                        (4)  Commencing on July 1, 1999 and continuing
thereafter through and including June 20, 2000, monthly rent shall equal One and
23/100 Dollars ($1.23) per square foot of office space and Sixty Eight Cents
($0.68) per square foot of warehouse space.
                        (5)  Commencing on July 1, 2000 and continuing
thereafter through and including June 30, 2001, monthly rent shall equal One and
28/100 ($1.28) per square foot of office space and Seventy Cents ($0.70) per
square foot of warehouse space.
                        (6)  Commencing on July 1, 2001 and continuing
thereafter through and including June 30, 2002, monthly rent shall equal One and
33/100 ($1.33) per square foot of office space and Seventy Three Cents ($0,73)
per square foot of warehouse space.
              (ii) Notwithstanding the foregoing, if Lessor fails to execute
such lease termination agreement on June 30, 1997 after Lessor's receipt of
Lessee's Notice than Lessee shall have the option to terminate the Lease
effective as of June 30, 1997 by notifying Lessor of its intention to do so
provided that Lessee pays to Lessor on June 30, 1997, Two Hundred Eleven
Thousand Seventy Hundred Sixty Dollars ($211,760) (equivalent to four (4)
months' rent) plus an additional amount equal to Lessor's reasonable estimation
of additional rent which would be payable by Lessee during said four (4) month
period pursuant to Paragraph 8B, 9C and 10 of the Lease.
    8.  NO FURTHER AMENDMENT: Except as amended herein, all other terms and
conditions of the Lease shall remain unchanged.
    IN WITNESS WHEREOF, the parties have executed this First
Amendment to Lease Agreement as of the day and year first above written.
LESSOR:
WDT-SHOREWAY
By: /S/ [signature unreadable]
    ---------------------------
Its: GP
    ---------------------------
LESSEE:
CELLNET DATA SYSTEMS, INC.
By: /S/ ▇▇▇▇ ▇. ▇▇▇▇
    ---------------------------
Its: CEO
    ---------------------------
                                                                     EXHIBIT C
                                     WDT SHOREWAY
                                SHOREWAY BUSINESS PARK
                             [site plan graphic omitted]
4.  RENT:  Rent, as described in Paragraph 3 of the Lease shall be as follows:
PERIOD                            MONTHLY RENT/NNN (see attached
                                                      breakdown on Exhibit D)
                         SECOND AMENDMENT TO LEASE AGREEMENT
    This Second Amendment to Lease Agreement ( Amendment') is effective as of
April 1, 1995 (the  Effective Date') by and between WDT-Shoreway, as Lessor, and
CellNetdata Systems, Inc. (formerly Domestic Automation Company) as Lessee who
agree as follows:
1.  Recitals:. This Agreement is entered into with respect to the following
facts and objectives:
    A.   Lessor and Lessee entered into that certain written lease agreement
dated April 6, 1989 for the property commonly known as ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇
▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇, as amended by that certain Addendum To That
Certain Lease Agreement By and Between Domestic Automation Company and WDT-
Shoreway Dated April 6, 1989, as amended by that certain Addendum II, executed
on September 20, 1994 and September 13, 1994, as amended by that certain
Addendum III, executed on January 1, 1991 and January 15, 1991 as amended by
that certain Addendum IV - Revised, executed on March 19, 1991 and March 7,
1991, as amended by that certain Addendum V, executed on May 31, 1991 and May
21, 1991, as amended by that certain Addendum VI, executed on October 14, 1992
and October 9, 1992, as amended by that certain Addendum VII, executed on
October 5, 1992 and October 1, 1992, and as amended by that certain First
Amendment to Lease Agreement, executed on July 1, 1994 (collectively, the
 Lease').
    B.   Lessee desires to exercise its Option to Lease from Lessor that
certain approximately fifteen thousand two hundred ninety-six (15,296) square
feet of office space located at ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇ as
designated as Option Area D on EXHIBIT C attached hereto (the  Additional
Space') on the terms and conditions set forth below.
2.  ADDITIONAL Space: Lessor hereby leases to Lessee and Lessee hereby leases
from Lessor the Additional Space.  Accordingly, the Premises shall mean the
following:
    15,296 sq. ft. of office space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
    22,272 sq. ft. of office space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
    17,457 sq. ft. of office space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
     5,007 sq. ft. of warehouse space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
     6,150 sq. ft. of warehouse space at ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
    66,182 SQUARE FEET
3.  LEASE EXTENSION:    The Lease term is hereby extended to December 31, 2000.
of the Lease relating to the initial Security Deposit shall likewise apply to
the additional Security Deposit.
8.  NO FURTHER AMENDMENT:    Except as amended herein, all other terms and
conditions of the Lease shall remain unchanged.
    IN WITNESS WHEREOF, the parties have executed this First Amendment to Lease
Agreement as of me day and year first written above.
LESSOR;
WDT-SHOREWAY
By: /S/ [signature unreadable]
Its: General Partner
LESSEE:
CELLNET DATA SYSTEMS, INC.
By: /s/ [signature unreadable]
Its: Vice President
                                          3
EXHIBIT D
                                 CELLNET DATA SYSTEMS
                                  BREAKDOWN OF RENT
 
From         To         75 Office     F&C Rent        125 Office       125            TI            TOTAL
                                     Differential                   Warehouse      Assessment*     MONTHLY
                                                                                                   PAYMENT
-------------------------------------------------------------------------------------------------------------
                                                                              
4/1/95   12/31/96       41,324.80      993.00         19,202.70      6,694.20       5,299.93       73,514.63
1/1/97   12/31/97       43,203.20      993.00         20,075.55      7,252.05       5,299.93       76,823.73
1/1/98   6/30/98        44,330.24      993.00         20,599.26      7,252.05       5,299.93       78,474.48
7/1/98   12/31/98       44,330.24      993.00         21,599.26      7,252.05           0.00       73,174.55
1/1/99   12/31/99       46,208.64      993.00         21,472.11      7,586.76           0.00       76,260.51
1/1/00   12/31/00       48,087.04      993.00         22,344.96      7,809.90           0.00       79,234.90
                                                                     *For TI's completed in 1994