EX-10.17
                              Lease with Amdahl Coporation

                                      LEASE

THIS LEASE, executed in duplicate as of the 14th day of September, 1973, between
JOHN A.  SOBRATO and SUSAN R.  SOBRATO,  as to an undivided  forty-five  percent
(45%), and CARL E. BERG and MARY ANN BERG, as to an undivided forty-five percent
(45%),  and ANN S. RUSSO, as to an undivided ten percent (10%),  interest in fee
simple absolute,  hereinafter called Lessor, and AMDAHL CORPORATION,  a Delaware
corporation, hereinafter called Lessee.

WlTNESSETH:  that Lessor  does  hereby  lease unto Lessee and Lessee does hereby
hire  and  take  from  Lessor  those  certain  premises  situate  in the City of
Sunnyvale, County of Santa Clara, State of California, and described as follows,
to wit: that property which is preliminarily  shown as Site I on Parcel 1 of the
map attached  hereto as Exhibit "A, " and made a part hereof,  the precise legal
description of said premises to be attached hereto as part of Exhibit "A" within
sixty (60) days of the date hereof, said legal description to be satisfactory to
Lessee,  together with the improvements consisting of four (4) buildings with an
aggregate of approximately two hundred thousand (200,000) enclosed, gross square
feet which are to he  constructed  on the  premises by Lessor's  contractors  in
accordance with the specifications and requirements ("Plans") prepared by Lessee
and approved by Lessor, which Plans are attached hereto as Exhibit "B," and made
a part hereof.

This lease  shall not  become  effective  and the lease term shall not  commence
unless and until the four (4) buildings, consisting of approximately two hundred
thousand (200,000) enclosed, gross square feet, are Fully Complete and Ready for
Occupancy . If such  buildings are not Fully Complete and Ready for Occupancy by
July 1, 1974  (extended  by the length of a delay,  if any,  directly  caused by
strikes,  acts of God or by any other cause which is both beyond the  reasonable
control of Lessor and not now reasonably foreseeable by Lessor),  Lessee, at its
option,  shall have no obligation to become bound under this lease. Lessee shall
also have the right to cancel this lease if the  landscaping  relating to Site I
or any remaining  work on the building  exteriors is not completed in accordance
with all of the  applicable  Plans within sixty (60) days after such,  buildings
are Fully  Complete and Ready for  Occupancy or if the  required  attachment  to
Exhibit  "A" hereto has not been  attached  within the time  prescribed  herein.
"Fully  Complete  and  Ready  for  Occupancy"  shall  mean  that  all  necessary
governmental approvals, permits, consents and certificates have been obtained by
or for Lessor for the lawful  construction,  and  occupancy  by Lessee,  of said
premises and improvements,  all of the building  interiors fully meet all of the
applicable  Plans,  all  of  the  building  exteriors   substantially  meet  the
applicable Plans, including paved parking areas, and said building interiors are
in "broomclean" finished condition.

The term shall be for twenty  (20)  years,  subject to the  renewal  options set
forth in  Paragraph  34 hereof.  Unless  Lessee has  theretofore  elected not to
become bound under this lease, as provided hereinabove,  the term shall commence
when the four (4) buildings are Fully Complete and Ready for Occupancy,  subject
to cancellation as set forth above,  but shall not commence in any event earlier
than  April  1,  1974,  unless  Amdahl,  at its  option,  elects  to take  early
possession of all or part of Site I in which event rent shall be prorated on the
basis of space occupied for the time of such early  possession.  Rental shall be
payable in lawful money of the United States of America,  which Lessee agrees to
pay to Lessor without deduction, setoff or demand at 2775 Middlefield Road, Palo
Alto,  California 94303, or such place or places as may be designated in writing
from time to time by Lessor, in advance, in installments as follows:  The rental
shall be  forty-eight  thousand  five  hundred  dollars  ($48,500.00)  per month
payable on the 1st day of each calendar month  throughout the term of this lease
(subject to the increases at ten (10) year  intervals  provided for in Paragraph
35 hereof),  said amount  being  subject to  finalization  by Lessor and Lessee,
which finalization shall, in all probability,  result in an increase or decrease
based upon Lessor's actual "Costs" of the premises and improvements.

It is further  mutually  agreed  between  the parties as  follows:  1.  SECURITY
DEPOSIT.  Lessee shall deposit with Lessor,  concurrent with the commencement of
construction  (i.e.,  "ground breaking") of the improvements  called for by this
lease,  a  security   deposit  in  the  amount  of  seventy   thousand   dollars
($70,000.00),  for the full and  faithful  performance  of each and every  term,
covenant and condition of this lease.  In the event Lessee has performed all the
terms,  covenants and conditions of this lease  throughout the term, upon Lessee
vacating the premises,  said security  deposit shall be returned to Lessee after
first  deducting any sums owing to Lessor.  If Lessee elects not to become bound
under this lease, or cancels this lease, as provided hereinabove, said sum shall
likewise be  returned.  If this lease be otherwise  terminated  for reason other
than default by Lessee, said sum shall likewise be returned. Said sum shall also
be immediately  returned  concurrent  with Lessee  reporting an audited  pre-tax
profit of two million dollars ($2,000,000.00) for any fiscal year.

2.  USE AND  POSSESSION.  The  premises  and  improvements  are to be  used  for
administrative  offices,  engineering,   research,   development,   assembly  of
computer-oriented  electronic  equipment and other  related  legal uses,  and no
other purpose.  If Lessee with Lessor's  consent takes  possession  prior to the
commencement  of the said term,  Lessee shall do so subject to all the covenants
and  conditions  hereof  and  shall  pay rent  for the  period  ending  with the
commencement  of the said term at the same monthly rate as that  prescribed  for
the first month of the said term. Any such early taking of possession  shall not
be deemed a formal acceptance of the premises and/or improvements as being Fully
Complete  and  Ready  for  Occupancy  and shall not be deemed a waiver of any of
Lessee's rights hereunder.

3. HOLDING OVER. If Lessee holds  possession  hereunder  after the expiration of
the term of this lease with consent of Lessor, Lessee shall become a tenant from
month to month upon all of the terms and conditions herein specified.

4. ENTRY BY LESSOR. Lessor and the agents and employees of Lessor shall have the
right to enter upon said premises at all reasonable times to inspect the same to
see that no  damage  has been or is done and to  protect  any and all  rights of
Lessor and to post such  reasonable  notices as Lessor may desire to protect the
rights of the Lessor.  Lessor may for a period commencing ninety (90) days prior
to the end of the lease term, or any extension  thereof,  have reasonable access
to the premises for the purpose of exhibiting  the same to  prospective  tenants
and may place upon said  premises any usual or ordinary "for sale" or "to !ease"
signs. 5. CONDITION AND REPAIRS. Lessee shall at Lessee's sole cost and expense,
maintain,  repair and keep the interior and exterior of the premises,  including
the roof and all structural components,  and each and every part thereof and all
appurtenances  thereto  (including,   without  limitation,   sidewalks  fronting
thereon, wiring, plumbing, sewage system, heating and air cooling installations,
glazing and  skylights,  in or bordering the premises and any store  front),  in
good  condition  and repair  during the term of this  lease,  damage  thereto by
earthquake,  act of God or the  elements  alone  excepted.  In the event  Lessee
should fail to start the repairs  required of Lessee  forthwith upon thirty (30)
days  written  notice by  Lessor,  Lessor,  in  addition  to all other  remedies
available hereunder or by law, and without waiving any alternative remedies, may
make the same and Lessee agrees to repay Lessor as  additional  rent the cost as
part of the rental  payable on the next day upon which rent becomes due.  Lessee
agrees upon the  expiration of the term of this lease or sooner  termination  to
surrender the premises in the same condition as received, ordinary wear and tear
and damage by  earthquake,  act of God or the elements  alone  excepted.  In the
event that any alterations,  repairs or acts of any kind shall be required to be
done by reason of Lessee's occupancy in connection with the premises or any part
thereof  under  the  provisions  of any law,  ordinance  or rule now in force or
hereafter enacted by municipal,  state or national authority,  the same shall be
made at the cost and expense of Lessee.  Lessee shall maintain the  landscaping.
Except as otherwise provided, all repairs, alterations and improvements that may
be required under this lease shall be done at the cost and expense of Lessee and
with respect to structural or mechanical  systems only with the written  consent
of Lessor first obtained by Lessee.

Lessee   agrees  that  if  Lessee  shall  make  any  repairs,   alterations   or
improvements,  excepting routine or emergency repairs, Lessee will not take such
action until two (2) days after  receipt by it of the written  consent of Lessor
required  by this  paragraph.  Lessee  will at all  times  permit  any  notices,
including notices of non-responsibility, to be posted and to remain posted until
the completion and acceptance of such work.

6. WASTE AND  ALTERATIONS.  Lessee shall not commit,  or permit to be committed,
any waste upon the said premises.  Lessee shall obtain Lessor's written consent,
which consent shall not be  unreasonably  withheld,  for any alteration  costing
more than five thousand dollars ($5,000.00).  Lessor hereby gives his consent to
the installation and removal, upon termination, of computer flooring paid for by
Lessee.

Upon  termination  of the  lease,  Lessee may  remove  its  property  so long as
premises  are  restored to original  condition  at Lessee's  expense.  Except as
otherwise provided herein, any property that is installed by Lessee after Lessee
takes  possession,  which has become an integral part of the building,  shall at
Lessor's option become its property. In the event of any subsequent additions or
alterations,  Lessee  agrees to restore to original  condition  as existed  when
Lessee first occupied upon written request of Lessor.

7.  ABANDONMENT.  Lessee  shall not vacate or 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 may be mortgaged by Lessor.

8.  ASSIGNMENT  AND  SUBLETTING.  Lessee may assign or sublet all or part of the
premises without Lessor's consent in connection with a merger,  consolidation or
sale of substantially  all its assets, so long as the assignee or sublessee is a
party  with  a  net  worth  equal  to  or  better  than  five  million   dollars
($5,000,000.00) .

With respect to any other sublease or assignment,  Lessee shall obtain  Lessor's
consent, which consent shall not be unreasonably withheld.

9.  INDEMNIFICATION  OF LESSOR.  Lessee  shall,  during the term of this  lease,
indemnify  and save  harmless  Lessor from any and all loss,  damage,  claims of
damage, demands,  obligations,  cause or causes of action, or liabilities of any
kind or nature (including  reasonable costs of attorneys' fees if Lessor is made
a party to any action to which Lessee's indemnity runs hereunder),  by reason of
injury or death of any person or persons or damage to any  property  of any kind
and to whomsoever belonging,  .including injury or death to the person or damage
to the property of Lessee,  Lessee's  officers,  directors,  employees,  agents,
subtenants and assignees,  concessionaires and licensees,  and any other person,
firm or  corporation,  selling  merchandise or services upon or from the demised
premises, or any part thereof,  from any cause or causes whatsoever,  except for
damage or injury occasioned by the intentional or negligent acts or omissions of
Lessor or his agents.

10. INSOLVENCY OR BANKRUPTCY. Either (a) the appointment of a receiver (except a
receiver  mentioned  in  paragraph  12  hereof)  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,  or (c) any action  taken or  suffered by Lessee
under any insolvency or bankruptcy  act shall  constitute a breach of this lease
by Lessee. Upon the happening of any such event, subject to the applicable grace
periods set forth in paragraph 11 hereof,  this lease shall  terminate  ten (10)
days after written notice of termination from Lessor to Lessee.

11.  DEFAULT.  Any of the  following  events shall  constitute a default of this
lease:

      (a) Use of the premises for any purpose other than as
      authorized in this lease;

      (b) Failure to pay rent or any other sums due to Lessor upon the date when
      said payment is due, said failure continuing for a period of ten (10) days
      after written notice of default;

      (c) Abandonment or vacation by tenant from the premises;

      (d) Except for a merger,  consolidation or a sale of substantially  all of
      Lessee's  assets,   assignment  without  the  Lessor'  s  consent  whether
      voluntary or involuntary;

      (e) A general  assignment by Lessee for the benefit of creditors;  (f) The
      filing of a voluntary petition in bankruptcy by Lessee or the filing of an
      involuntary  petition  by  Lessee's  creditors,  said  petition  remaining
      undischarged for a period of thirty (30) days;

      (g) The appointment of a receiver to take possession of substantially  all
      of Lessee's assets or of the leased premises,  said receivership remaining
      undissolved for a period of thirty (30) days;

      (h) Attachment,  execution or other judicial seizure of substantially  all
      of Lessee's assets or the leased premises,  such attachment,  execution or
      other seizure remaining undismissed or undischarged for a period of thirty
      (30) days after the levy thereof;

      (i) Failure to commence repairs,  required to be made by Lessee hereunder,
      within  thirty  (30) days after  written  notice  thereof  from  Lessor to
      Lessee;

      (j) Failure to perform any of Lessee's covenants  hereunder,  except those
      listed in items (a) through (i) above, said failure  continuing for thirty
      (30) days after written notice thereof from Lessor to Lessee.

In the event of a default,  and in  addition  to all other  rights and  remedies
Lessor  may have at law,  Lessor  shall  have the option to do any or all of the
following:

      A. REENTRY.  Immediately  reenter and remove all persons and property from
      the  premises,  storing said  personal  property in a public  warehouse or
      elsewhere at the cost of and for the account of Lessee. No such reentry or
      taking of  possession  of the  premises by Lessor shall be construed as an
      election on his part to terminate  this lease,  unless a written notice of
      such intention is given by the Lessor to Lessee or unless the  termination
      thereof be decreed by a court of competent jurisdiction.

      B. WITHOUT  TERMINATION  OF THE LEASE  PURSUE THE REMEDY  PROVIDED BY THIS
      LEASE AND CIVIL CODE SECTION  1951.4.  Without  termination  of the lease,
      collect by suit or otherwise  each  installment of rent or other sum as it
      becomes due hereunder, or to enforce by suit or otherwise,  any other term
      or  provision  hereof  on the  part  of  Lessee  required  to be  kept  or
      performed,  it being specifically  agreed that all unpaid  installments of
      rent or other sums shall bear  interest at the highest legal rate from the
      due date thereof until paid.

      Without  terminating the lease,  Lessor may relet the premises or any part
      thereof for such term or terms (which may be for a term  extending  beyond
      the term of this  lease) and at such rental or rentals and upon such other
      terms and  conditions as Lessor in his sole  discretion may deem advisable
      with the right to make alterations and repairs to said premises  necessary
      for reletting. Upon such reletting,(i) Lessee be immediately liable to pay
      to Lessor, in addition to any indebtedness  other than rent due hereunder,
      the cost and expense of such reletting,  including  reasonable  attorneys'
      fees  and  real  estate  commissions,  and  the  reasonable  cost  of such
      alteration  and  repairs  incurred by Lessor,  and the amount,  if any, by
      which the rent reserved in this lease for the period of such reletting (up
      to but not beyond the term of the lease)  exceeds the amount  agreed to be
      paid as rent by new Lessee for the  demised  premises  for such  period on
      such reletting,  or (ii) at the option of Lessor,  rent received by Lessor
      for such reletting shall be applied first to payment of any  indebtedness,
      other than rent due hereunder from Lessee to Lessor; second, to payment of
      any  costs and  expenses  of such  reletting  and of such  alteration  and
      repair;  third,  to  payment of rent due and unpaid  hereunder;  and,  the
      residue,  if any, shall be held by Lessor and applied in payment of future
      rent as may become due and payable hereunder.  If Lessee has been credited
      with any rent to be received for reletting under Option (i), and such rent
      shall not be  promptly  paid to Lessor by new Lessee,  or if such  rentals
      received  from such  reletting  under Option (ii) during any month be less
      than paid during that month by Lessee hereunder, Lessee shall pay any such
      deficiency  to  Lessor.  Such  deficiency  shall  be  calculated  and paid
      monthly.

      PROVIDED,  HOWEVER,  that if the  Lessor  does  not  relet  said  premises
      himself,  then Lessee may sublet or assign his  interest in the lease,  or
      both, pursuant to paragraph 8 hereunder.

      Any  reasonable  expenses  incurred for  renovation  and alteration of the
      premises in order to put said  premises in condition  for occupancy by the
      assignee or sublessee of Lessee, shall be borne by Lessee.

      C.  TERMINATION OF THE LEASE PURSUANT TO SECTION 1951.2 OF THE CIVIL CODE.
      Notwithstanding any such reletting without termination,  Lessor may at any
      time  thereafter  elect to  terminate  this  lease  for any such  previous
      breach.  Should Lessor at any time terminate this lease for any breach, in
      addition to any other remedy he may have,  he may recover from Lessee,  at
      the time of award, any and all of the following damages:

           (i) All  unpaid  rent up to the time of  termination,  plus  interest
           thereon at the legal rate.

           (ii)  Between  the date of  termination  and the date of  award,  the
           difference between the unpaid rent and the amount of such rental loss
           that the Lessee proves  Lessor could  reasonably  have avoided,  plus
           interest thereon at the legal rate.

           (iii) The  discounted  present  value of the  difference  between the
           unpaid  rent for the  balance  of the term  after  the  award and the
           amount of such  rental loss the Lessee  proves the Lessor  could have
           reasonably  avoided.  The discount  rate shall be the prime  interest
           rate of the Federal  Reserve Bank of San Francisco,  plus one percent
           (1%).

      All of these  amounts  shall be  immediately  due and  payable  at date of
      award, from the Lessee to Lessor.

      In  addition  to the  amounts  recovered  for damages for loss of past and
      future rents,  Lessor shall be entitled to recover reasonable  expenses in
      retaking the property,  in making repairs Lessee was obligated to make, in
      preparing the property for reletting,  and in reletting the property,  and
      other such damages as necessary to compensate Lessor for all the detriment
      caused by Lessee,  including,  but not  limited  to,  breaches of specific
      covenants  of the lease such as the promise to maintain and the promise to
      restore the premises on termination.

12.  RECEIVERSHIP.  If a receiver be  appointed at the instance of Lessor in any
action against Lessee to take  possession of said premises and/or to collect the
rents or profits  derived  therefrom,  the  receiver  may, if it be necessary or
convenient  in order to collect such rents and profits,  conduct the business of
Lessee then being  carried on in said  premises and may take  possession  of any
personal property  belonging to Lessee and used in the conduct of such business,
and  may use the  same in  conducting  such  business  on the  premises  without
compensation to Lessee for such use. Neither the application for the appointment
of such receiver, nor the appointment of such a receiver,  shall be construed as
an election on Lessor's part to terminate  this lease unless a written notice of
such intention is given to Lessee by Lessor.

13.  SURRENDER  OF LEASE.  The  voluntary  or other  surrender  of this lease by
Lessee, or a mutual cancellation thereof, shall not work a merger, 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 Lessor of any or
all such subleases or subtenancies.

14. LITIGATION EXPENSES. If either party shall bring an action against the other
by reason of the  breach of any  covenant,  warranty  or  condition  hereof,  or
otherwise  arising out of this lease,  whether for  declaratory or other relief,
the  prevailing  party in such suit shall be  entitled  to its costs of suit and
reasonable  attorney fees,  which shall be payable whether or not such action is
prosecuted to judgment.  Prevailing  party within the meaning of this  paragraph
shall  include,  without  limitation,  a party who brings an action  against the
other after the other's  default,  ii such action is dismissed  upon the other's
payment of the sums  allegedly due or  performance  of the  covenants  allegedly
breached,  or if the plaintiff or  cross-complainant  obtains  substantially the
relief sought by it in the action.

15. UTILITIES. Lessee shall pay for all the water, sewage, fuel, gas, oil, heat,
electricity,   telephone,   janitorial,  landscape  maintenance  and  all  other
materials  and  services  which  may be  furnished  to or used in or about  said
premises during the term of this lease.

16. LIENS. Lessee shall keep the premises and building of which the premises are
a part free and clear of any liens and shall indemnify, hold harmless and defend
Lessor  from any liens and  encumbrances  arising out of any work  performed  or
materials  furnished by or at the direction of Lessee.  In the event any lien is
filed,  Lessee shall do all acts  necessary to discharge  any lien within thirty
(30) days of filing, or if Lessee desires to contest any lien, then Lessee shall
deposit  with Lessor one and one-half  (1-1/2)  times the amount of said lien as
security for the payment of said lien claim.

17.  TAXATION.  In addition to all other payments  herein provided to be made by
Lessee and as additional rental hereunder,  Lessee agrees to pay at least twenty
(20) days before  delinquency  all real property  taxes and special  assessments
which  have  become  or may  become a lien  upon the  demised  premises  (or are
otherwise imposed or assessed on the demised premises) or any portion thereof or
upon improvements  thereon or improvements added thereto during the term of this
lease. If Lessee fails to pay such taxes and/or assessments,  in addition to all
other remedies Lessor has herein,  Lessor shall have the right to pay any or all
of such taxes and/or  assessments  and to recover  reimbursement  therefor  from
Lessee. Taxes and assessments for the year in which this lease commences and for
the year in which it terminates shall be equitably  prorated.  Lessee shall have
the right to contest any assessment or tax, and in the event that Lessee decides
to attempt such contest,  Lessor shall  provide  documents  that are  reasonably
necessary  to that end . Lessee  shall be liable  for all taxes  levied  against
personal property, inventory and trade fixtures.

18. USES PROHIBITED.  Lessee shall not use, or permit said premises, or any part
thereof,  to be used,  for any  purpose or  purposes  other than the  purpose or
purposes for which the said premises are hereby leased; and no use shall be made
or permitted to be made of the said premises, nor acts done, which will increase
the existing  rate of insurance  upon the building in which said premises may be
located, 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 said  premises,  any article which may be prohibited by the standard
form of fire  insurance  policies.  Lessee  shall,  at  Lessee's  sole  cost and
expense,  comply with any and all requirements,  pertaining to said premises, of
any  insurance  organization  or  company,  necessary  for  the  maintenance  of
reasonable  fire and public  liability  insurance,  covering  said  building and
appurtenances.

19. INSURANCE. Lessee shall maintain comprehensive public liability, plate glass
and property damage insurance to protect against any liability to the public, or
to any employee, agent or invitee of Lessee or Lessor, incident to the use of or
resulting from any accident  occurring in or about the premises,  with limits of
liability of not less than one million dollars ($1,000,000.00) for injury to one
person, two million dollars  ($2,000,000.00)  for injury to two or more persons,
and five  hundred  thousand  dollars  ($500,000.00)  for  property  damage.  All
policies of insurance provided for herein shall:

the State of California,  and rated "AAA" or better in Best's Insurance Reports,
or as specifically otherwise accepted by Lessor by written consent:

(b) Be written as primary policies of insurance and not contributing  with or in
excess of any coverage which Lessor may carry, and cover, insure and name Lessor
as an additional assured;

(c) Contain an endorsement  requiring thirty (30) days' written notice to Lessor
prior to cancellation or any change in coverage.

During the term of this lease,  Lessee, at its expense,  shall maintain in force
insurance  against loss or damage by fire to the  improvements  located upon the
leased  premises in the  initial  amount of four  million  seven  hundred  fifty
thousand  dollars  ($4,750,000.00),  with  extended and  vandalism  coverage and
special  extended  perils ("all risk"),  which amount may be increased in future
years based upon possible bona fide  appraised  increases in  replacement  cost.
However, Lessee need not purchase insurance covering damage due to earthquake.

Such  insurance  shall be  procured  from a  responsible  insurance  company  or
companies  authorized  to do  business  in  California,  and in form  reasonably
satisfactory to Lessor or any  encumbrancer,  as their  respective  interest may
appear,  and the  policies  evidencing  such  insurance  may be endorsed  with a
mortgagee's loss payable  endorsement in standard form and shall be delivered to
Lessor  (and kept by Lessor or  encumbrancer),  and  renewals  thereof  shall be
delivered  by  Lessee  to  Lessor  at  least  thirty  (30)  days  prior to their
respective  expiration  dates and  shall be kept by Lessor or any  encumbrancer.
Lessor shall be named as additional insured on said policies which shall provide
that Lessor be given  thirty (30) days' notice of any  nonpayment  of premium or
cancellation.

20. COMPLIANCE WITH GOVERNMENTAL REGULATIONS. Lessee shall, at his sole cost and
expense, comply with all of the requirements of all Municipal, State and Federal
authorities  now in force,  or which may  hereafter be in force,  pertaining  to
Lessee's occupancy in connection with the premises.

21. EFFECTS OF CONVEYANCE. If Lessor is not in default of any of his obligations
hereunder,  the term "Lessor" as used in this lease means only the owner for the
time being of the land and buildings  containing  the premises,  so that, in the
event of any sale of said land and buildings, or in the event of a lease of said
buildings,  the Lessor shall be and hereby is entirely freed and relieved of all
covenants and  obligations of the Lessor  hereunder,  and it shall be deemed and
construed,  without further  agreement  between the parties and the purchaser of
any such sale or the Lessee of the  buildings,  that the  purchaser or Lessee of
the  buildings  has  assumed and agreed to carry out any and all  covenants  and
obligations of the Lessor  hereunder.  If any security be given by the Lessee to
secure the faithful  performance of all or any of the covenants of this lease on
the part of Lessee,  the Lessor may transfer and deliver the security,  as such,
to the purchaser at any such sale or the Lessee of the buildings,  and thereupon
the Lessor shall be discharged from any further liability in reference  thereto,
if Lessor is not in default of any of his obligations hereunder.

22.  ADVERTISEMENTS  AND SIGNS.  Lessee shall not  inscribe,  paint or affix any
signs,  advertisements,  placecards  or awnings on the  exterior  or roof of the
premises or upon the entrance doors,  windows, or the sidewalk on or adjacent to
the  premises  without the prior  written  consent of Lessor.  Lessor  shall not
unreasonably withhold such consent. Any signs so placed on the premises shall be
so placed upon the  understanding  and agreement that Lessee will remove same at
expiration or  termination of this lease and will repair any damage or injury to
the premises  caused thereby,  and if not so removed by Lessee,  then Lessor may
remove it at Lessee's expense .

23. DESTRUCTION OF PREMISES. If any of the buildings on the premises are damaged
or destroyed by fire,  earthquake,  act of God, the elements or as the result of
faulty  construction  or design,  Lessee shall give immediate  notice thereof to
Lessor and the monthly rent due  hereunder  shall be  immediately  reduced by an
amount  equal  to the  amount  of rent  per  square  foot  to be paid  hereunder
multiplied by the number of unusable  square feet of floor space.  If Lessor has
not repaired the damage within one hundred  twenty (120) days,  either party may
terminate this lease.

24.  CONDEMNATION.  The word "condemnation" or "condemned" as used in this lease
shall mean the exercise of, or intent to exercise,  the power of eminent  domain
expressed by the condemnor in any writing as well as by the filing of any action
or  proceeding  for such  purpose,  by any  entity  having the right of power of
eminent domain, and shall include a voluntary sale by Lessor to any such entity,
either  under  threat of  condemnation  or while  condemnation  proceedings  are
pending  and  "condemnation"  shall  occur  upon the actual  physical  taking of
possession  by the  condemnor.  In the event the  demised  premises  or any part
thereof are condemned,  this lease shall terminate, and Lessor shall be entitled
to and shall  receive the total amount of any award made with  respect  thereto,
regardless  of whether the award is based on a single award or a separate  award
as between  Lessor and Lessee,  and, if and to the extent that any such award or
awards shall be made to Lessee or to any person,  firm or  corporation  claiming
through or under Lessee, Lessee hereby irrevocably assigns to Lessor all of it's
right,  title and interest in and to any and all such awards.  No portion of any
such award or awards shall be paid to Lessee for any  so-called  bonus or excess
value of this lease by reason of the  relationship  between  the rental  payable
under this lease and the fair  rental for the  demised  premises  at the time of
condemnation.  The foregoing  notwithstanding,  Lessor shall turn over to Lessee
that  portion  of  any  such  award  received  by  Lessor   hereunder  which  is
attributable  to Lessee's  fixtures and equipment which are condemned as part of
the real  property but which Lessee would  otherwise be entitled to remove,  and
the appraisal of the court, or the condemning  entity if the condemnation is not
determined by a court,  of the amount of any such award  allocable to such items
shall be conclusive.  If total award be fixed by negotiation and be greater than
the condemning entity's appraisal, the portion attributable to Lessee's fixtures
and equipment aforesaid shall be the same proportion of the actual award as said
fixtures and equipment were of the entity's appraisal.

25.  WAIVER.  The  waiver  by Lessor 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 or any  subsequent  breach of the same or any other term,
covenant or condition  therein  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.

26.  SUBORDINATION.  The right of Lessee  under this lease shall he and they are
subject and  subordinate  at all times to a lien of a first deed of trust not to
exceed five million  dollars  ($5,000,000.00)  now or ever in force  against the
property of Lessor's  leasehold  estate and to all advances made or hereafter to
be made upon the  security  thereof,  and  Lessee  shall  execute  such  further
instruments subordinating this lease to the lien or liens of any such first deed
of  trust  not to  exceed  five  million  dollars  ($5,000,000.00)  as  shall be
requested by Lessor.  Lessee hereby  irrevocably  appoints Lessor as attorney in
fact for Lessee with full power and authority to execute and deliver in the name
of Lessee any such instrument or instruments if Lessee  unreasonably  refuses to
execute and deliver such instrument or instruments.

27. NOTICES. All notices to be given hereunder shall be in writing.

28. SUCCESSORS AND ASSIGNS, The covenants and agreements contained in this lease
shall be  binding  upon the  parties  hereto and upon  their  respective  heirs,
executors, administrators, successors and assigns, and all of the parties hereto
shall be jointly and severally liable hereunder.

29.  REMEDIES  CUMULATIVE.  The remedies  available to Lessor under the terms of
this  agreement and in law or equity shall be cumulative and the exercise of one
remedy shall not constitute an election of remedies.

30 TIME. Time is of the essence of this lease.

31. CAPTIONS.  The captions in this lease are for convenience only and are not a
part  of this  lease  and do not in any way  limit  or  amplify  the  terms  and
provisions of this lease.

32. SPECIAL MAINTENANCE.  Lessee shall provide maintenance at least bimonthly to
all air conditioning  and heating  equipment and repair or replace any equipment
when  required,  including  the cost of  labor,  when not  covered  by  existing
warranties.  Lessee  to  supply  Lessor  with a copy  of  maintenance  agreement
contract  with  a  licensed  air  conditioning  service  contractor  or  provide
preventative maintenance in accordance with accepted industry practice.

33. FLOOR TILE.  Lessee to replace  floor tile to Lessor's  satisfaction  in the
event tile is not in the same  condition at the expiration of this lease as when
first received, exclusive of normal wear and tear.

34.  RENEWAL  OPTIONS.  Lessee  shall  have an option to renew this lease for an
unlimited  number of five (5) year terms,  commencing  on the  expiration of the
original  term,  by giving  notice to Lessor at least  ninety  (90) prior to the
expiration of the unexpired  term of Lessee  election to exercise this option to
renew.  The extended term shall be upon all the terms and  conditions  set forth
herein, including, but not limited to, Paragraph 35 hereof.

35. RENTAL  INCREASES.  The monthly rental  provided for herein will increase by
fifteen  percent (15%) of the initial monthly rental at the end of each ten (10)
year period during which this lease remains in force and effect .

36. SUBROGATION. Lessee shall be subrogated to any rights
which Lessor may have against any contractor, subcontractor,
equipment manufacturer or supplier.

IN WITNESS  WHEREOF,  the parties  hereto have executed this lease as of the day
and year first above written.

AMDAHL CORPORATION

By /s/ Ralph Rodriquez
Its Executive Vice President

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato
SUSAN R. SOBRATO

/s/ Carl E. Berg
CARL E. BERG

/s/ Mary Ann Berg
MARY ANN BERG

/s/ Ann S. Russo
ANN S. RUSSO

Exhibit "A"
[graphic]





                                      LEASE
THIS LEASE, executed in duplicate as of the 15th day of July, 1974, between JOHN
A. SOBRATO and SUSAN R. SOBRATO,  as to an undivided  forty-five  percent (45%),
and CARL E. BERG and MARY ANN BERG, as to an undivided forty-five percent (45%),
and ANN S. RUSSO,  as to an undivided ten percent (10%),  interest in fee simple
absolute,   hereinafter  called  Lessor,  and  AMDAHL  CORPORATION,  a  Delaware
corporation,  hereinafter  called  Lessee.  WITNESSETH:  that Lessor does hereby
lease unto Lessee and Lessee does hereby hire and take from Lessor those certain
premises  situated in the City of  Sunnyvale,  County of Santa  Clara,  State of
California,  and described as follows,  to wit: that property  which is shown as
Phase II on the map attached hereto as Exhibit "A", and made a part hereof,  the
precise  legal  description  of  said  premises  including  ingress  and  egress
easements to be attached hereto as part of Exhibit "A" within sixty (60) days of
the date hereof, said legal description to be first approved by Lessee, together
with the  improvements  consisting  of a one-story  industrial  building with at
least  sixty  thousand  (60,000)enclosed,  gross  square  feet  which  is  to be
constructed  on the premises by  independent  contractors  under  supervision of
Lessor and Lessee and in accordance with the plans and specifications  ("Plans")
to be prepared by Lessor.  Such Plans are subject to the reasonable  approval of
Lessee and will be attached hereto as Exhibit "B", at such time, and made a part
hereof.  Lessor and Lessee  shall  have the right to  approve  all  contractors,
subcontractors  and material  men, and Lessor and Lessee shall have the right to
approve all expenses relating to construction of said improvements before Lessor
has contracted for same.

This lease  shall not  become  effective  and the lease term shall not  commence
unless and until the one-story  building,  consisting of at least sixty thousand
(60,000) enclosed, gross square feet, is Fully Complete and Ready for Occupancy.
If such  building is not Fully  Complete and Ready for  Occupancy by February 1,
1977  (extended by the length of a delay,  if any,  directly  caused by strikes,
acts of God or by any other cause which is both beyond the reasonable control of
Lessor and not now  reasonably  foreseeable by Lessor),  Lessee,  at its option,
shall have no  obligation  to become  bound under this lease.  Lessee shall also
have the right to cancel this lease if the  landscaping  relating to Phase II or
any remaining work on the building  exterior is not completed in accordance with
all of the applicable  Plans within sixty (60) days after such building is Fully
Complete and Ready for  Occupancy or if the required  attachment  to Exhibit "A"
hereto has not been attached within the time prescribed herein.  "Fully Complete
and Ready for Occupancy" shall mean that all necessary  governmental  approvals,
permits,  consents and certificates  have been obtained by or for Lessor for the
lawful  construction  by Lessor,  and occupancy by Lessee.  of said premises and
improvements,  all of the building  interior  fully meets all of the  applicable
Plans, all of the building  exterior  substantially  meets the applicable Plans,
including  paved parking areas,  and said building  interior is in "broom clean"
finished  condition.  Notwithstanding  anything t: the contrary  herein,  Lessor
shall not be responsible to repair any defect in the design or  construction  of
the  building  and any other  improvements  constructed  by  Lessor as  provided
herein,  except that Lessor  shall be  responsible  to enforce any  customary or
expressed  warranties from the general contractor,  subcontractors,  material or
equipment  supplier,  architect  and  engineer.  The term shall be for seventeen
years  (17) and six months  (6),  subject to the  renewal  options  set forth in
Paragraph 33 hereof.  Unless Lessee has theretofore  elected not to become bound
under this lease,  as provided  hereinabove,  the term shall  commence  when the
building is Fully Complete and Ready for Occupancy,  subject to  cancellation as
set forth  above,  but shall not  commence in any event  earlier than January 1,
1977,  unless Amdahl,  at its option,  elects to take early possession of all or
part of Phase II in which  event,  rent shall be  prorated on the basis of space
occupied  for the time of such  early  possession.  Rental  shall be  payable in
lawful  money of the United  States of America,  which  Lessee  agrees to pay to
Lessor without deduction,  setoff or demand at 2775 Middlefield Road, Palo Alto,
California  94306,  or such place or places as may be designated in writing from
time to time by Lessor, in advance' in installments as follows: The rental shall
be nineteen  thousand  dollars  ($19,000.00) per month payable on the 1st day of
each calendar month  throughout the term of this lease (subject to the increases
at five (5) year intervals provided for in Paragraph 34 hereof).

It is further mutually agreed between the parties as follows:

1. SECURITY DEPOSIT. Lessee has deposited with Lessor, a security deposit in the
amount of  nineteen  thousand  dollars  ($19,000.00).  In the event  Lessor  has
performed all the terms,  covenants and  conditions of this lease,  the nineteen
thousand dollars  ($19,000.00)  shall be applied as first month's rental. 2. USE
AND POSSESSION.  The premises and improvements are to be used for administrative
offices,  engineering,  research,  development,  assembly  of  computer-oriented
electronic  equipment and any other legal uses, and no other purpose.  If Lessee
with Lessor's  consent takes  possession  prior to the  commencement of the said
term,  Lessee shall do so subject to all the covenants and conditions hereof and
shall pay rent for the period ending with the  commencement  of the said term at
the same monthly rate as that  prescribed  for the first month of the said term,
subject to  proration  as provided in the  WITNESSETH.  Any such early taking of
possession  shall  not be  deemed a formal  acceptance  of the  premises  and/or
improvements  as being Fully  Complete and Ready for  Occupancy and shall not be
deemed a waiver of any of Lessee's rights hereunder.

3. HOLDING OVER. If Lessee holds  possession  hereunder  after the expiration of
the term of this lease with consent of Lessor, Lessee shall become a tenant from
month to month upon all of the terms and conditions herein specified.

4. ENTRY BY LESSOR. Lessor and the agents and employees of Lessor shall have the
right to enter upon said premises at all reasonable times to inspect the same to
see that no  damage  has been or is done and to  protect  any and all  rights of
Lessor and to post such  reasonable  notices as Lessor may desire to protect the
rights of the Lessor.  Lessor may for a period commencing ninety (90) days prior
to the end of the lease term, or any extension  thereof,  have reasonable access
to the premises for the purpose of exhibiting  the same to  prospective  tenants
and may place upon said  premises any usual or ordinary "for sale" or "to lease"
signs.

5.  CONDITION  AND REPAIRS.  Subject to the  WITNESSETH  hereinbefore  provided,
Lessee shall at Lessee's  sole cost and expense,  maintain,  repair and keep the
interior and exterior of the  premises,  including  the roof and all  structural
components,  and each and  every  part  thereof  and all  appurtenances  thereto
(including,  without limitation,  sidewalks fronting thereon,  wiring, plumbing,
sewage system, heating and air cooling installations,  glazing and skylights, in
or bordering  the premises and any store  front),  in good  condition and repair
during the term of this lease;  damage thereto by earthquake,  act of God or the
elements  alone  excepted.  In the event Lessee should fail to start the repairs
required of Lessee  forthwith  upon thirty (30) days  written  notice by Lessor,
Lessor,  in addition to all other  remedies  available  hereunder or by law, and
without waiving any alternative remedies, may make the same and Lessee agrees to
repay Lessor as  additional  rent the cost as part of the rental  payable on the
next day upon which rent becomes due.  Lessee agrees upon the  expiration of the
term of this lease or sooner  termination  to surrender the premises in the same
condition as received;  ordinary wear and tear and damage by earthquake,  act of
God or the elements alone excepted.  In the event that any alterations,  repairs
or acts of any kind shall be required to be done by reason of Lessee's occupancy
in connection  with the premises or any part thereof under the provisions of any
law, ordinance or rule now in force or hereafter enacted by municipal,  state or
national  authority,  the same shall be made at the cost and  expense of Lessee.
Lessee  shall  maintain  the  landscaping.  All vinyl  wall  surfaces  are to be
maintained in as good a condition as when Lessee took  possession free of holes,
gouges,  or  defacements.  Lessee to limit  attachments  to vinyl wall  surfaces
exclusively to V-joints with no larger than #6 screws.

All  repairs,  alterations  and  improvements  that may be  required  under this
Paragraph 5 shall be done at the cost and expense of Lessee.  Lessee will at all
times permit any proper notices, including proper notices of non-responsibility,
to be posted and to remain posted until the  completion  and  acceptance of such
work.

6. WASTE AND  ALTERATIONS.  Lessee shall not commit,  or permit to be committed,
any waste upon the said premises.  Lessee shall obtain Lessor's written consent,
which consent shall not be unreasonably  withheld,  for any alteration or repair
costing more than five thousand dollars ($5,000.00),  and no work shall commence
until two days after Lessee receives  Lessor's  written  consent.  Lessor hereby
gives his consent to the installation and removal, upon termination, of computer
flooring paid for by Lessee.

Upon  termination of the lease,  Lessee may remove its property and Lessee shall
restore the  premises  to original  condition  at  Lessee's  expense.  Except as
otherwise provided herein, any property that is installed by Lessee after Lessee
takes possession,  which has become an integral part of the building,  shall, if
agreed by Landlord and Tenant,  become Landlord's property.  In the event of any
subsequent  additions  or  alterations,  Lessee  agrees to restore  to  original
condition as existed when Lessee first occupied upon written request of Lessor.

7.  ABANDONMENT.  Lessee  shall not vacate or 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,
subject to applicable  provisions  of law, at the option of Lessor,  except such
property as may be mortgaged by Lessor.

8.  ASSIGNMENT  AND  SUBLETTING.  Lessee may assign or sublet all or part of the
premises  without  Lessor's  consent to a parent,  subsidiary,  affiliate  or in
connection  with a merger,  consolidation  or sale of  substantially  all of its
assets.

With respect to any other sublease or  assignment,  Lessee shall not assign this
Lease,  or any interest  therein,  and shall not sublet the said premises or any
part thereof, or any right or privilege appurtenant thereto, or suffer any other
person to occupy or use the said premises,  or any portion thereof,  without the
written  consent  of  Lessor  first  had  and  obtained,  and a  consent  to one
assignment,  subletting  occupation  or use by any  other  person,  shall not be
deemed to be a consent to any subsequent assignment,  subletting,  occupation or
use by another person.  Any such  assignment or subletting  without such consent
shall be void,  and shall,  at the option of the Lessor,  terminate  this Lease,
providing Lessor has not unreasonably withheld such consent. With respect to any
other sublease or assignment  except as provided in the first  paragraph of this
paragraph  8, of this  Lease.  this  Lease  shall  not,  nor shall any  interest
therein,  be  assignable,  as to the  interest of Lessee,  by  operation of law,
without the written consent of Lessor,  which shall not be reasonably  withheld.
With respect to any other sublease or assignment except as provided in the first
paragraph of this  paragraph 8, of this Lease,  if Lessee  desires to assign its
rights  under this Lease or to sublet all or a portion of the  premises,  Lessee
shall  first  notify  Lessor  of the  proposed  terms  and  conditions  of  such
assignment  or  subletting;  and Lessor shall have the right of first refusal to
enter  into a direct  lessor-lessee  relationship  with such  party  under  such
proposed  terms and  conditions,  in which event Lessee shall be relieved of its
obligations  hereunder to the extent of the lessor-lessee  relationship  entered
into between  Lessor and such third party;  provided  that Lessor shall not have
the above  right of first  refusal  if the term of the  proposed  assignment  or
sublease  including  options  to  extend is for a term not in excess of five (5)
years.

9. INDEMNIFICATION OF LESSOR.  Lessee shall, during the term of this lease, save
harmless  Lessor  from any and all  loss,  damage,  claims of  damage,  demands,
obligations,  cause or causes of action,  or  liabilities  of any kind or nature
(including  reasonable costs of attorneys' fees if Lessor is made a party to any
action to which Lessee's indemnity runs hereunder), by reason of injury or death
of any person or persons or damage to any property of any kind and to whomsoever
belonging,  occurring  on the premises if caused by Lessee,  Lessee's  officers,
directors,  employees,  agents,  subtenants and assignees,  concessionaires  and
licensees,  except that Lessor  shall be liable to Lessee for damages  resulting
from the acts or willful omissions of Lessor or its employees or agents.  Lessor
shall hold Lessee  harmless from all damages  arising out of any such damage.  A
party's obligation under this Paragraph 9 to hold the other party harmless shall
be limited to any excess sum over insurance  proceeds,  if any,  received by the
party being indemnified,  including, without limitation, all attorneys' fees and
other litigation costs and indemnified expenses incurred by the person.

10. INSOLVENCY OR BANKRUPTCY. Either (a) the appointment of a receiver (except a
receiver  mentioned  in  Paragraph  12  hereof)  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,  or (c) any action  taken or  suffered by Lessee
under any insolvency or bankruptcy  act shall  constitute a breach of this lease
by Lessee. Upon the happening of any such event, subject to the applicable grace
periods set forth in Paragraph 11 hereof,  this lease shall  terminate  ten (10)
days after written notice of termination from Lessor to Lessee.

11.  DEFAULT.  Any of the  following  events shall  constitute a default of this
lease:

      (a) Use of the premises for any purpose other than as
      authorized in this lease;

      (b) Failure to pay rent or any other sums due to Lessor upon the date when
      said payment is due, said failure continuing for a period of ten (10) days
      after written notice of default;

      (c) Abandonment or vacation by tenant from the premises;

      (d) Except for a merger,  consolidation or a sale of substantially  all of
      Lessee's assets, assignment without the Lessor's consent whether voluntary
      or involuntary;

      (e) A general  assignment by Lessee for the benefit of creditors;  (f) The
      filing of voluntary  petition in  bankruptcy by Lessee or the filing of an
      involuntary  petition  by  Lessee's  creditors,  said  petition  remaining
      undischarged for a period of thirty (30) days;

      (g) The appointment of a receiver to take possession of substantially  all
      of Lessee's assets or of the leased premises,  said receivership remaining
      undissolved for a period of thirty (30) days;

      (h) Attachment,  execution or other judicial seizure of substantially  all
      of Lessee's assets or the leased premises,  such attachment,  execution or
      other seizure remaining undismissed or undischarged for a period of thirty
      (30) days after the levy thereof;

      (i) Failure to commence repairs,  required to be made by Lessee hereunder,
      within  thirty  (30) days after  written  notice  thereof  from  Lessor to
      Lessee;

      (j) Failure to perform any of Lessee's covenants  hereunder,  except those
      listed in items (a) through (i) above, said failure  continuing for thirty
      (30) days after written notice thereof from Lessor to Lessee.

In the event of a default,  and in  addition  to all other  rights and  remedies
Lessor  may have at law,  Lessor  shall  have the option to do any or all of the
following:

      A. REENTRY.  Immediately  reenter and remove all persons and property from
      the  premises,  storing said  personal  property in a public  warehouse or
      elsewhere at the cost of and for the account of Lessee. No such reentry or
      taking of  possession  of the  premises by Lessor shall be construed as an
      election on his part to terminate  this lease,  unless a written notice of
      such intention is given by the Lessor to Lessee or unless the  termination
      thereof be decreed by a court of competent jurisdiction.

      B. WITHOUT  TERMINATION  OF THE LEASE  PURSUE THE REMEDY  PROVIDED BY THIS
      LEASE AND CIVIL CODE SECTION  1951.4.  Without  termination  of the lease,
      collect by suit or otherwise  each  installment of rent or other sum as it
      becomes due hereunder, or to enforce by suit or otherwise,  any other term
      or  provision  hereof  on the  part  of  Lessee  required  to be  kept  or
      performed,  it being specifically  agreed that all unpaid  installments of
      rent or other sums shall bear  interest at the highest legal rate from the
      due date thereof until paid.

      Without terminating the lease, Lessor shall relet the premises or any part
      thereof for such term or terms (which may be for a term  extending  beyond
      the term of this  lease) and at such rental or rentals and upon such other
      terms  and  conditions  as Lessor in his  reasonable  discretion  may deem
      advisable with the right to make  alterations and repairs to said premises
      necessary for reletting.  Upon such  reletting,  (i) Lessee is immediately
      liable to pay to Lessor,  in addition to any indebtedness  other than rent
      due  hereunder,  the  cost  and  expense  of  such  reletting,   including
      reasonable attorneys' fees and real estate commissions, and the amount, if
      any,  by which the rent  reserved  in this  lease for ,the  period of such
      reletting (up to but not beyond the term of the lease)  exceeds the amount
      agreed to be paid as rent by new Lessee for the demised  premises for such
      period on such reletting,  or (ii) at the option of Lessor,  rent received
      by Lessor  for such  reletting  shall be  applied  first to payment of any
      indebtedness, other than rent due hereunder from Lessee to Lessor; second,
      to payment of any costs and expenses of such reletting;  third, to payment
      of rent due and unpaid hereunder;  and, the residue, if any, shall be held
      by Lessor and  applied  in  payment  of future  rent as may become due and
      payable  hereunder.  If  Lessee  has  been  credited  with  any rent to be
      received  for  reletting  under  Option  (i),  and such rent  shall not be
      promptly  paid to Lessor by new Lessee,  or if such rentals  received from
      such reletting under Option (ii) during any month be less than paid during
      that month by Lessee  hereunder,  Lessee shall pay any such  deficiency to
      Lessor. Such deficiency shall be calculated and paid monthly.

      PROVIDED,  HOWEVER,  that if the  Lessor  does  not  relet  said  premises
      himself,  then Lessee may sublet or assign his  interest in the lease,  or
      both, pursuant to paragraph 8 hereunder.

      Any  reasonable  expenses  incurred for  renovation  and alteration of the
      premises in order to put said  premises in condition  for occupancy by the
      assignee or sublessee of Lessee, shall be borne by Lessee.

      C TERMINATION  OF THE LEASE  PURSUANT TO SECTION 1951.2 OF THE CIVIL CODE.
      Notwithstanding any such reletting without termination,  Lessor may at any
      time  thereafter  elect to  terminate  this  lease  for any such  previous
      breach.  Should Lessor at any time terminate this lease for any breach, in
      addition to any other remedy he may have,  he may recover from Lessee,  at
      the time of award, any and all of the following damages:

           (i) All  unpaid  rent up to the time of  termination,  plus  interest
           thereon at the legal rate.

           (ii)  Between  the date of  termination  and the date of  award,  the
           difference between the unpaid rent and the amount of such rental loss
           that the Lessee proves  Lessor could  reasonably  have avoided,  plus
           interest thereon at the legal rate.

           (iii) The  discounted  present  value of the  difference  between the
           unpaid  rent for the  balance  of the term  after  the  award and the
           amount of such  rental loss the Lessee  proves the Lessor  could have
           reasonably  avoided.  The discount  rate shall be the prime  interest
           rate of the Federal  Reserve Bank of San Francisco,  plus one percent
           (1%).

      All of these  amounts  shall be  immediately  due and  payable  at date of
      award, from the Lessee to Lessor.

      In  addition  to the amount  recovered  for  damages  for loss of past and
      future rents,  Lessor shall be entitled to recover reasonable  expenses in
      retaking the property,  in making repairs Lessee was obligated to make, in
      preparing the property for reletting,  and in reletting the property,  and
      other such damages as necessary to compensate Lessor for all the detriment
      caused by Lessee,  including,  but not  limited  to,  breaches of specific
      covenants  of the lease such as the promise to maintain and the promise to
      restore the premises on termination.

12.  SURRENDER  OF LEASE.  The  voluntary  or other  surrender  of this lease by
Lessee, or a mutual cancellation thereof, shall not work a merger, and shall not
terminate all or any existing subleases or subtenancies, but shall operate as an
assignment to Lessor of any or all such subleases or subtenancies.

13. LITIGATION EXPENSES. If either party shall bring an action against the other
by reason of the  breach of any  covenant,  warranty  or  condition  hereof,  or
otherwise  arising out of this lease,  whether for  declaratory or other relief,
the  prevailing  party in such suit shall be  entitled  to its costs of suit and
reasonable  attorney fees,  which shall be payable whether or not such action is
prosecuted to judgment.  Prevailing  party within the meaning of this  paragraph
shall  include,  without  limitation,  a party who brings an action  against the
other after the other's  default,  if such action is dismissed  upon the other's
payment of the sums  allegedly due or  performance  of the  covenants  allegedly
breached,  or if the plaintiff or  cross-complainant  obtains  substantially the
relief sought by it in the action.

14. UTILITIES. Lessee shall pay for all the water, sewage, fuel, gas, oil, heat,
electricity,   telephone,   janitorial,  landscape  maintenance  and  all  other
materials  and  services  which  may be  furnished  to or used in or about  said
premises during the term of this lease.

15. LIENS. Lessee shall keep the premises and building of which the premises are
a part  free and clear of any liens  and  encumbrances  arising  out of any work
performed  or  materials  furnished  by or at the  direction of Lessee and shall
indemnify,  hold  harmless  and defend  Lessor  from any liens and  encumbrances
arising out of any work performed or materials  furnished by or at the direction
of  Lessee.  In the  event  any such  lien is  filed,  Lessee  shall do all acts
necessary to discharge any lien within thirty (30) days of filing,  or if Lessee
desires to contest any such lien,  then Lessee shall deposit with Lessor one and
one-half  (1-1/2)  times the amount of said lien as security  for the payment of
said lien claim.

16.  TAXATION.  In addition to all other payments  herein provided to be made by
Lessee and as additional  rental  hereunder,  Lessee agrees to pay to the County
tax  collector  prior  to  delinquency,  all real  property  taxes  and  special
assessments which have become or may become a lien upon the demised premises (or
are  otherwise  imposed or  assessed  on the  demised  premises)  or any portion
thereof or upon  improvements  thereon or improvements  added thereto during the
term of this lease,  provided that any said taxes and  assessment  shall be paid
over the  maximum  period  permitted  by law and Lessee  shall be liable on only
those  payments  due during the term  hereof.  If Lessee fails to pay such taxes
and/or assessments,  in addition to all other remedies Lessor has herein, Lessor
shall have the right to pay any or all of such taxes and/or  assessments  and to
recover  reimbursement  therefor from Lessee. Taxes and assessments for the year
in which this lease  commences and for the year in which it terminates  shall be
equitably  prorated.  Lessee shall have the right to contest any  assessment  or
tax, and in the event that Lessee decides to attempt such contest,  Lessor shall
provide  documents  that are reasonably  necessary to that end.  Lessee shall be
liable for all taxes  levied  against  personal  property,  inventory  and trade
fixtures. 17. USES PROHIBITED. Lessee shall not use, or permit said premises, or
any part thereof, to be used, for any purpose or purposes other than the purpose
or purposes for which the said premises are hereby  leased;  and no use shall be
made or permitted  to be made of the said  premises,  nor acts done,  which will
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
said premises,  any article which may be prohibited by the standard form of fire
insurance policies. Lessee shall, at Lessee's sole cost and expense, comply with
any  and  all  requirements,  pertaining  to  said  premises,  of any  insurance
organization  or company,  necessary for the  maintenance of reasonable fire and
public liability insurance, covering said building and appurtenances.

18. INSURANCE. Lessee shall maintain comprehensive public liability, plate glass
and property damage insurance to protect against any liability to the public, or
so any employee, agent or invitee of Lessee or Lessor, incident to the use of or
resulting from any accident  occurring in or about the premises,  with limits of
liability of not less than one million dollars ($1,000,000.00) for injury to one
person, two million dollars  ($2,000,000.00)  for injury to two or more persons,
and five  hundred  thousand  dollars  ($500,000.00)  for  property  damage.  All
policies of insurance provided for herein shall:

      (a) Be written in  companies  authorized  to do  business  in the State of
      California,  and rated "AAA" or better in Best's Insurance Reports,  or as
      specifically otherwise accepted by Lessor by written consent.

      (b) Be written as primary policies of insurance and not contributing  with
      or in excess of any coverage which Lessor may carry, and cover, insure and
      name Lessor as an additional assured;

      (c) Contain an endorsement  requiring  thirty (30) days' written notice to
      Lessor prior to cancellation or any change in coverage.

During the term of this lease,  Lessee, at its expense,  shall maintain in force
insurance  against loss or damage by fire to the  improvements  located upon the
leased  premises in the initial  amount of one million  eight  hundred  thousand
dollars  ($1,800,000.00),  with  extended  and  vandalism  coverage  and special
extended  perils  ("all  risk"),  which  amount may be increased in future years
based upon possible bona fide appraised  increases in replacement cost. However,
Lessee need not purchase insurance covering damage due to earthquake.

Such  insurance  shall be  procured  from a  responsible  insurance  company  or
companies  authorized  to do  business  in  California,  and in form  reasonably
satisfactory to Lessor or any  encumbrancer,  as their  respective  interest may
appear,  and the  policies  evidencing  such  insurance  may be endorsed  with a
mortgagee's loss payable  endorsement in standard form and shall be delivered to
Lessor  (and kept by Lessor or  encumbrancer),  and  renewals  thereof  shall be
delivered  by  Lessee  to  Lessor  at  least  thirty  (30)  days  prior to their
respective  expiration  dates and  shall be kept by Lessor or any  encumbrancer.
Lessor shall be named as additional insured on said policies which shall provide
that Lessor be given  thirty (30) days' notice of any  nonpayment  of premium or
cancellation.

Each party shall cause each insurance  policy obtained by it to provide that the
insurance  company  waives all right of recovery by way of  subrogation  against
either  party in  connection  with any  damage  covered  by any  policy.  If any
insurance  policy  cannot  be  obtained  with a  waiver  of  subrogation,  or is
obtainable  only by the  payment  of an  additional  premium  charge  above that
charged by insurance  companies  issuing policies without waiver of subrogation,
the party  undertaking  to obtain the insurance  shall notify the other party of
this fact. The other party shall have a period of ten (10) days after  receiving
the  notice  either to place the  insurance  with a company  that is  reasonably
satisfactory  to the other party that will carry the insurance  with a waiver of
subrogation,  or to  agree to pay the  additional  premium  if such a policy  is
obtainable at additional  cost. If the insurance cannot be obtained or the party
in whose favor a waiver of subrogation is desired  refuses to pay the additional
premium  charged,  the other  party is relieved  of the  obligation  to obtain a
waiver of subrogation rights with respect to the particular insurance involved.

19. COMPLIANCE WITH GOVERNMENTAL REGULATIONS. Lessee shall, at his sole cost and
expense, comply with all of the requirements of all Municipal, State and Federal
authorities now in force pertaining to Lessee's occupancy of the premises.

20. EFFECTS OF CONVEYANCE. If Lessor is not in default of any of his obligations
hereunder,  the term "Lessor" as used in this lease means only the owner for the
time being of the land and buildings  containing  the premises,  so that, in the
event of any sale of said land and buildings, or in the event of a lease of said
buildings,  the  transferring  Lessor shall be and hereby is entirely  freed and
relieved of all covenants and obligations of the Lessor hereunder,  and it shall
be deemed and construed,  without further  agreement between the parties and the
purchaser of any such sale or the Lessee of the  buildings,  that the purchasing
Lessor  of the  buildings  has  assumed  and  agreed  to  carry  out any and all
covenants and obligations of the Lessor  hereunder.  If any security be given by
the Lessee to secure the faithful  performance of all or any of the covenants of
this lease on the part of Lessee,  the Lessor  shall  transfer  and  deliver the
security,  as such,  to the  purchaser  at any such  sale or the  Lessee  of the
buildings,  and  thereupon  the  Lessor  shall be  discharged  from any  further
liability  in  reference  thereto,  if  Lessor is not in  default  of any of his
obligations hereunder.

21.  ADVERTISEMENTS  AND SIGNS.  Lessee shall not  inscribe,  paint or affix any
signs,  advertisements,  placecards  or awnings on the  exterior  or roof of the
premises or upon the entrance doors,  windows, or the sidewalk on or adjacent to
the  premises  without the prior  written  consent of Lessor.  Lessor  shall not
unreasonably withhold such consent. Any signs so placed on the premises shall be
so placed upon the  understanding  and agreement that Lessee will remove same at
expiration or  termination of this lease and will repair any damage or injury to
the premises  caused thereby,  and if not so removed by Lessee,  then Lessor may
remove it at Lessee's expense.

22. DESTRUCTION OF PREMISES. If any of the buildings on the premises are damaged
or destroyed by fire,  earthquake,  act of God, the elements or as the result of
faulty  construction  or design,  Lessee shall give immediate  notice thereof to
Lessor and the monthly rent due  hereunder  shall be  immediately  reduced by an
amount  equal  to the  amount  of rent  per  square  foot  to be paid  hereunder
multiplied by the number of unusable  square feet of floor space.  If Lessor has
not repaired the damage within one hundred  twenty (120) days,  either party may
terminate this lease.

23.  CONDEMNATION.  The word "condemnation" or "condemned" as used in this lease
shall  mean  the  exercise  of the  power of  eminent  domain  expressed  by the
condemnor  in any  writing as well as by the filing of any action or  proceeding
for such purpose, by any entity having the right of power of eminent domain, and
shall include a voluntary sale by Lessor to any such entity, either under threat
of   condemnation   or  while   condemnation   proceedings   are  pending,   and
"condemnation"  shall  occur  upon  the  actual  taking  of  possession  by  the
condemnor.  In the event the demised premises or any part thereof are condemned,
this lease  shall  terminate,  and Lessor and  Lessee  shall be  entitled  their
respective  interests  in the  amount of any award  made with  respect  thereto,
regardless  of whether the award is based on a single award or a separate  award
as between Lessor and Lessee. A portion of such award or awards shall be paid to
Lessee for any  so-called  bonus or excess  value of this lease by reason of the
relationship between the rental payable under this lease and the fair rental for
the demised  premises  at the time of  condemnation.  Lessor  shall turn over to
Lessee  that  portion of any such award  received by Lessor  hereunder  which is
attributable  to Lessee's  fixtures and equipment which are condemned as part of
the real  property but which Lessee would  otherwise be entitled to remove,  and
the appraisal of the court, or the condemning  entity if the condemnation is not
determined by a court,  of the amount of any such award  allocable to such items
shall be conclusive.  If total award be fixed by negotiation and be greater than
the condemning entity's appraisal, the portion attributable to Lessee's fixtures
and equipment aforesaid shall be the same proportion of the actual award as said
fixtures and equipment were of the entity's appraisal.

24.  WAIVER.  The  waiver  by Lessor 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 or any  subsequent  breach of the same or any other term,
covenant or condition  therein  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.

25. SUBORDINATION. Notwithstanding any subordination of this lease, Lessee shall
have the right to quiet possession and shall not be disturbed by an successor in
interest to Lessor,  provided  Lessee is not in default  under this lease and so
long as Lessee shall pay rent and observe all other provisions of this lease.

26. NOTICES. All notices to be given hereunder shall be in writing.

27. SUCCESSORS AND ASSIGNS. The covenants and agreements contained in this lease
shall be  binding  upon the  parties  hereto and upon  their  respective  heirs,
executors, administrators, successors and assigns, and all of the parties hereto
shall be jointly and severally liable hereunder.

28.  REMEDIES  CUMULATIVE.  The remedies  available to Lessor under the terms of
this  agreement and in law or equity shall be cumulative and the exercise of one
remedy shall not constitute an election of remedies.

29. TIME. Time is of the essence of this lease.  30.  CAPTIONS.  The captions in
this lease are for convenience  only and are not a part of this lease and do not
in any way limit or amplify the terms and provisions of this lease.  31. SPECIAL
MAINTENANCE.  Lessee shall  provide  maintenance  at least  bimonthly to all air
conditioning  and heating  equipment  and repair or replace any  equipment  when
required,  including the cost of labor, when not covered by existing warranties.
Lessee to supply  Lessor with a copy of  maintenance  agreement  contract with a
licensed air conditioning service contractor or provide preventative maintenance
in accordance with accepted industry practice. 32. FLOOR TILE. Lessee to replace
floor  tile to  Lessor's  satisfaction  in the  event  tile  is not in the  same
condition at the expiration of this lease as when first  received,  exclusive of
normal wear and tear. 33. RENEWAL OPTIONS.  Lessee shall have an option to renew
this lease for an  unlimited  number of five (5) year terms,  commencing  on the
expiration of the original term, by giving notice to Lessor at least ninety (90)
days prior to the  expiration  of the original or then extended term of Lessee's
election  to  exercise  this  option to renew.  The  extended  term of  Lessee's
election to exercise  this option to renew.  The extended term shall be upon all
the terms and  conditions  set forth  herein,  including,  but not  limited  to,
Paragraph 34 hereof.

34. RENTAL  INCREASES.  The monthly rental  provided for herein will increase by
seven  percent  (7%) of the initial  monthly  rental at the end of each five (5)
year period during which this lease remains in force and effect.

35. SUBROGATION. Lessor shall assign to Lessee and Lessee shall be subrogated to
any rights, including warranties,  which Lessor may have against any contractor,
subcontractor, equipment manager or supplier.

IN WITNESS  WHEREOF,  the parties  hereto have executed this lease as of the day
and year first above written.

AMDAHL CORPORATION

By /s/ Clifford J. Madden
Clifford J. Madden
Its Vice President and Secretary

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato by Carl E. Berg her Attorney in Fact
SUSAN R. SOBRATO

/s/ Carl E. Berg
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

/s/ Ann S. Russo
ANN S. RUSSO





                                 LEASE AMENDMENT

THIS  AGREEMENT is entered into as of the 28th day of September,  1976 and shall
modify that  certain  lease dated July 15th,  1976,  between JOHN A. SOBRATO and
SUSAN R. SOBRATO, as to an undivided  forty-five percent (45%), and CARL E. BERG
and MARY ANN BERG,  as to an  undivided  forty-five  percent  (45%),  and ANN S.
RUSSO, as to an undivided ten percent (10%) in fee simple absolute,  hereinafter
called  Lessor,  and AMDAHL  COOPERATION,  a Delaware  corporation,  hereinafter
called Lessee.

NOW, THEREFORE, IN CONSIDERATION of the mutual covenants:

Legal Description Parcel C

All that certain real property situate in the City of Sunnyvale, County of Santa
Clara, State of California being
more particularly described as follows:

Beginning at the northwesterly  corner of Parcel 38....  Containing 17,811 acres
of land more or less.

Legal Description Parcel B

All that certain real property situate in the City of Sunnyvale, County of Santa
Clara, State of California being
more particularly described as follows:

Beginning at the most southwesterly corner of Parcel 39, as said parcel is shown
on that  certain  Parcel Map  recorded  on March  28,1975 in Book 353 of Maps at
Pages 18 and 19, Santa Clara  County  Records,  said point of beginning  being a
point on the right of way line of Central Expressway;  thence from said point of
beginning  along the  westerly  line of Parcel 39, N 0(degree)  02' 02" W S95.44
feet to the northwest corner of said Parcel 39; thence along tile northerly line
of said Parcel 39, S 85(degree) 00' 39" E 31.00 feet;  thence along the arc of a
curve to the  southwest  from a radial line which bears N 85(degree)  00' 39" 17
having a radius of 60.00 feet,  a central  angle of  25(degree)  44' 37", an arc
distance of 26.96 reef, to a point of compound curvature; thence on the arc of a
curve having a radius or 90.00 feet, a central angle of  30(degree)  46' 00", an
arc distance of 48,33 feet;  thence S 0(degree) 02' 02" E 276,68 feet; thence on
tile arc of a tangent curve to the left, having a radius of 90.00 feet a central
angle  of  25(degree)  50' 31",  an arc  distance  of  40.59  feet to a point of
compound  curvature;  thence  on the arc of a tangent  curve  having a radius of
60.00 feet, a central  angle of 7(degree)  22' 42" an arc distance of 7.73 feet;
thence N 89(degree)  57' 58" E 415.93 feet;  thence S 0(degree) 02' 02" E 318.00
feet;  thence S 89(degree)  57' 58" 1' 10.00 feet;  thence S 0(degree) 02' 02" E
137.86  feet to a point on the right of way line of Central  Expressway;  thence
along said right of way line S  89(degree)  57' 58" W 30,00 feet;  thence on the
arc of a curve to the southwest  from a radial line which bears S 89(degree) 57'
58",  having a radius of 40,00 feet, a central angle of  89(degree)  37' 42", an
arc distance of 62,57 feet;  thence S  89(degree)  35' 40" 11 358.11 feet to the
point of beginning.

 Containing 5.028 acres of land more or less.





                                 LEASE AMENDMENT
THIS AGREEMENT is entered as of this 15th day of July, 1976, by and between JOHN
A.  SOBRATO,  SUSAN R.  SOBRATO,  CARL E.  BERG,  MARY ANN BERG and ANN S. RUSSO
(hereinafter  collectively  referred  to  as  "Sobrato-Berg-Russo")  and  AMDAHL
CORPORATION (hereinafter called "Amdahl"), a Delaware corporation.

RECITALS:

The  parties  enter  this  Agreement  on  the  basis  of  the  following  facts,
understandings and intentions:

A.  On  September  14,  1973,  Amdahl  and  Sobrato-Berg-Russo  entered  into an
agreement  (hereinafter called "Amdahl  Agreement") in which  Sobrato-Berg-Russo
granted to Amdahl an option to  purchase  and right of first  refusal  regarding
certain land and right of first refusal on other land.  Amdahl has not exercised
any of said rights.  The Amdahl Agreement also provided that  Sobrato-Berg-Russo
would lease certain improved property (hereinafter called "Phase I") in the City
of  Sunnyvale,  County  of  Santa  Clara,  State  of  California,  Phase I being
described  in Exhibit I attached  hereto and  incorporated  herein by  reference
thereto.  The  lease  obligations  for  Phase  I  were  set  forth  in  a  lease
(hereinafter  called  "Lease I"),  which was attached as Exhibit B to the Amdahl
Agreement and was dated September 14, 1973.

B. Amdahl and  Sobrato-Berg-Russo  now desire to cancel all rights,  obligations
and  understandings  of the  Amdahl  Agreement,  except as  provided  explicitly
herein,  amend Lease I and enter into new lease (hereinafter  called "Lease II")
of certain  property  with  improvements  (hereinafter  called "Phase II") to be
constructed  by  Sobrato-Berg-Russo,  Phase II being  contiguous  to Phase I and
described  in Exhibit 2 attached  hereto and  incorporated  herein by  reference
thereto.

NOW,  THEREFORE,  IN  CONSIDERATION  of the mutual covenants and promises of the
parties herein, the parties hereto agree as follows:

1. Cancellation: Amdahl Agreement. Cancel the Amdahl Agreement, except for Lease
I and as otherwise provided herein.

2. Amendment: Lease I. The parties amend and clarify Lease I as herein provided.

     (a) Rent.  From and after the date  hereof the  monthly  rent under Lease I
     shall be  Forty-Seven  Thousand  Six Hundred  Thirty-Two  and Twenty  Cents
     ($47,632.20),  subject  to  Paragraph  35 of the Lease I. (b)  Commencement
     Date. The commencement date of Lease I was June 22, 1974.

     (c) Assignment and Subletting. Paragraph 8 of the Lease shall be amended to
     read as follows:

           Lessee  may  assign or sublet  all or part of the  Premises,  without
           Lessor's consent, to a parent, subsidiary, affiliate or in connection
           with a  merger,  consolidation  or sale of  substantially  all of its
           assets.

           With respect to any other  sublease or  assignment,  Lessee shall not
           assign this Lease, or any interest therein,  and shall not sublet the
           said  Premises  or any  part  thereof,  or  any  right  or  privilege
           appurtenant  thereto, or suffer any other person to occupy or use the
           said Premises, or any portion thereof, without the written consent of
           Lessor  first  had and  obtained,  and a consent  to one  assignment,
           subletting occupation or use by any other person, shall not be deemed
           to be a consent to any subsequent assignment,  subletting, occupation
           or use by another person.  Any such assignment or subletting  without
           such consent shall be void,  and shall,  at the option of the Lessor,
           terminate this Lease,  providing Lessor has not unreasonably withheld
           such consent. With respect to any other sublease or assignment except
           as provided in the first paragraph of this paragraph 8 of this Lease,
           this Lease shall not, nor shall any interest therein,  be assignable,
           as to the  interest  of Lessee,  by  operation  of law,  without  the
           written consent of Lessor, which shall not be unreasonably  withheld.
           With respect to any other  sublease or assignment  except as provided
           in the first  paragraph of this paragraph 8, of this Lease, if Lessee
           desires to assign  its rights  under this Lease or to sublet all or a
           portion of the  Premises,  Lessee  shall first  notify  Lessor of the
           proposed terms and conditions of such  assignment or subletting;  and
           Lessor  shall have the right of first  refusal to enter into a direct
           lessor-lessee  relationship with such party under such proposed terms
           and  conditions,  in which  event  Lessee  shall be  relieved  of its
           obligations hereunder to the extent of the lessor-lessee relationship
           entered  into  between  Lessor and such third  party;  provided  that
           Lessor shall not have the above right of first refusal if the term of
           the  proposed  assignment  or sublease is for a term not in excess of
           three (3) years, with an option not to exceed two (2) years.

      (d) Continuing Obligations. Except as otherwise provided herein the rights
      and  obligations of the parties under Lease I shall continue in full force
      and effect.

3. Agreement:  Lease II.  Contemporaneously  herewith, the parties have executed
and  entered  Lease  II,  Lease  II  being  attached  hereto  as  Exhibit  3 and
incorporated herein by reference thereto.

4. Access.  Amdahl grants  Sobrato-Berg-Russo  an access easement as provided in
the Grant of Lease Easement  (hereinafter called "Easement")  attached hereto as
Exhibit 4 and incorporated herein by reference thereto. Sobrato-Berg-Russo shall
install a connection  driveway  between Phase I and Phase II and proposed  Phase
III, and Amdahl  shall have no cost  relating to the  Easement,  and any loss of
parking spaces on Phase I as a result of said driveway shall be compensated  for
by  Sobrato-Berg-Russo's  grant of parking  and access  thereto on the  property
described in Exhibit 5,  attached  hereto and  incorporated  herein by reference
thereto.  Sobrato-Berg-Russo  shall also pay all fees for relocation of any sign
owned by Amdahl, and Sobrato-Berg-Russo indemnifies and holds Amdahl harmless of
and from any loss, cost or expense  relating to the Easement or any work done or
use made of Phase I and Phase II in connection therewith.

5. Right of First Refusal: Phase I. Sobrato-Berg-Russo  grants Amdahl a right of
first  refusal to  purchase  Phase I. The terms of this  right of first  refusal
shall be for the period during which  Sobrato-Berg-Russo  owns Phase I and shall
operate as follows:  Sobrato-Berg-Russo shall advise Amdahl in writing should it
wish to offer Phase I for sale  (Sobrato-Berg-Russo  shall not in any event sell
or offer  for sale only a portion  of Phase I) and the terms and  conditions  of
said proposed sale.  Within thirty (30) business days following  receipt of such
notice,  Amdahl  may  advise  Sobrato-Berg-Russo  in  writing  that it wishes to
purchase  Phase  I on  the  same  terms  and  conditions,  including  the  price
specified,  in which event  Sobrato-Berg-Russo  shall  consummate such sale with
Amdahl on such terms and conditions;  provided, however, that if Amdahl does not
so notify Sobrato-Berg-Russo within such thirty (30) business day period, Amdahl
shall thereafter have no further rights to purchase Phase I unless such proposed
sale is not consummated by  Sobrato-Berg-Russo  within six (6) months of the end
of said thirty (30)  business  day period,  in which event Amdahl shall have the
same rights of first  refusal  with regard to any  subsequent  proposed  sale of
Phase I by Sobrato-Berg-Russo as specified in this paragraph. Sobrato-Berg-Russo
agrees that this right of first refusal may, at Amdahl's  request,  be reflected
in a separate written  agreement and  Sobrato-Berg-Russo  agrees to execute said
agreement  and  to  execute,  acknowledge  and  deliver  recordable  instruments
promptly upon request  therefor in order to evidence or effectuate said right of
first refusal.

6. Right of First Refusal: Phase II. Sobrato-Berg-Russo grants Amdahl a right of
first  refusal to  purchase  Phase II. The terms of this right of first  refusal
shall be for the period during which  Sobrato-Berg-Russo owns Phase II and shall
operate as follows:  Sobrato-Berg-Russo shall advise Amdahl in writing should it
wish to offer Phase II for sale (Sobrato-Berg-Russo  shall not in any event sell
or offer for sale only a portion  of Phase II) and the terms and  conditions  of
said proposed sale.  Within thirty (30) business days following  receipt of such
notice,  Amdahl  may  advise  Sobrato-Berg-Russo  in  writing  that it wishes to
purchase  Phase  II on the  same  terms  and  conditions,  including  the  price
specified,  in which event  Sobrato-Berg-Russo  shall  consummate such sale with
Amdahl on such terms and conditions;  provided, however, that if Amdahl does not
so notify Sobrato-Berg-Russo within such thirty (30) business day period, Amdahl
shall  thereafter  have no  further  rights to  purchase  Phase II  unless  such
proposed sale is not consummated by Sobrato-Berg-Russo  within six (6) months of
the end of said thirty (30)  business  day period,  in which event  Amdahl shall
have the same rights of first  refusal  with regard to any  subsequent  proposed
sale  of  Phase  II  by  Sobrato-Berg-Russo  as  specified  in  this  paragraph.
Sobrato-Berg-Russo  agrees  that this right of first  refusal  may,  at Amdahl's
request,  be reflected in a separate  written  agreement and  Sobrato-Berg-Russo
agrees to  execute  said  agreement  and to  execute,  acknowledge  and  deliver
recordable  instruments  promptly upon request  therefor in order to evidence or
effectuate said right of first refusal.

I'M WITNESS  WHEREOF,  the parties hereto have executed this Agreement in two or
more copies the date and year first above written.

AMDAHL CORPORATION

By /s/ Clifford J. Madden
Clifford J. Madden
Its Vice President and Secretary

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato by Carl E. Berg her Attorney in Fact
SUSAN R. SOBRATO

/s/ Carl E. Berg
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

/s/ Ann S. Russo
ANN S. RUSSO





                                 LEASE AMENDMENT

THIS  AGREEMENT is entered into as of the 28th day of September,  1976 and shall
modify that certain lease dated  September 14th,  1973,  between JOHN A. SOBRATO
and SUSAN R. SOBRATO,  as to an undivided  forty-five percent (45%), and CARL E.
BERG and MARY ANN BERG, as to an undivided  forty-five percent (45%), and ANN S.
RUSSO, as to an undivided ten percent (10%) in fee simple absolute,  hereinafter
called  Lessor,  and AMDAHL  CORPORATION,  a Delaware  corporation,  hereinafter
called Lessee.

NOW,  THEREFORE,  IN  CONSIDERATION  of the mutual covenants and promises of the
parties herein, the parties hereto agree as follows:

1. Exhibit "A": The precise legal  description  of the premises shown as part of
Exhibit "A" which was approved by Lessee on September 18, 1973 is hereby revised
to the legal  description  of the  parcel  shown on the Map as Parcel "C" of the
tentative map prepared by Kier & Wright, dated 9/28/76.

IN WITNESS WHEREOF, the parties hereto have executed this
Agreement in two or more copies the date and year first above
written.
AMDAHL CORPORATION

By /s/ Clifford J. Madden
Clifford J. Madden
Its Vice President and Secretary

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato by Carl E. Berg her Attorney in Fact
SUSAN R. SOBRATO

/s/ Carl E. Berg
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

/s/ Ann S. Russo
ANN S. RUSSO





                               AMENDMENT TO LEASES

THIS  AGREEMENT  is entered as of this 8th day of August,  1977,  by and between
JOHN A. SOBRATO,  SUSAN R. SOBRATO, CARL E. BERG, MARY ANN BERG and ANN S. RUSSO
(hereinafter  collectively  referred  to  "Sobrato"),   and  AMDAHL  CORPORATION
(hereinafter called "Amdahl"), a Delaware corporation.

RECITALS:

The  parties  enter  this  Agreement  on  the  basis  of  the  following  facts,
understandings and intentions:

A. Sobrato has leased to Amdahl certain property with improvements  (hereinafter
called  "Phase I")  pursuant co a lease dated  September  14, 1973 (the lease as
amended being hereinafter referred to as "Phase I Lease"), Phase I being located
in the City of Sunnyvale,  County of Santa Clara,  State of California,  and the
land of Phase I being described in Exhibit A to the Phase I Lease.

B.  Sobrato  has also  leased  to  Amdahl  certain  property  with  improvements
(hereinafter  called  "Phase  II")  pursuant to a lease dated July 15, 1976 (the
lease as amended being  hereinafter  referred to as "Phase II Lease"),  Phase II
being  contiguous to Phase I and being located in the City of Sunnyvale,  County
of Santa Clara, State of California, and the land of Phase II being described in
Exhibit A to the Phase II Lease.

C. The  parties  now desire to amend the Phase I Lease and the Phase II Lease as
herein provided.

NOW,  THEREFORE,  IN  CONSIDERATION  of the mutual promises and covenants of the
parties, the parties hereto agree as follows:

1. Phase I Lease: Renewal Options.  Paragraph 34 of the Phase I Lease,  entitled
"RENEWAL  OPTIONS" is hereby deleted from the Phase I Lease, and in its stead is
inserted the following:

      "34. RENEWAL OPTIONS.  Lessee shall have an option to renew this Lease for
      fifteen (15) consecutive five (5) year terms, the first of which commences
      on the expiration of the original term of this Lease,  by giving notice to
      Lessor at least one hundred and twenty (120) days prior to the  expiration
      of the original term, or the then extended  term, of Lessee's  election to
      exercise this option to renew. The extended terms shall be upon all of the
      terms and  conditions  set forth  herein,  including,  but not limited to,
      Paragraph 35 hereof."

2. Phase II Lease: Renewal Options. Paragraph 33 of the Phase II Lease' entitled
"RENEWAL OPTIONS" is hereby deleted from the Phase II Lease, and in its stead is
inserted the following:

       "33. RENEWAL OPTIONS. Lessee shall have an option to renew this Lease for
      fifteen (15) consecutive five (5) year terms, the first of which commences
      on the expiration of the original term of this Lease,  by giving notice to
      Lessor at least one hundred and twenty (120) days prior to the  expiration
      of the original term, or the then extended  term, of Lessee's  election to
      exercise this option to renew. The extended terms shall be upon all of the
      terms and  conditions  set forth  herein,  including,  but not limited to,
      Paragraph 34 hereof."

 3. Phase I Lease:  Condemnation.  The entire Paragraph 24 of the Phase I Lease,
Paragraph  24 of the  Phase I Lease  being  entitled  "CONDEMNATION",  is hereby
deleted, and in its stead is inserted the following:

      "24. CONDEMNATION.  The word "condemnation" or "condemned" as used in this
      Lease shall mean the exercise of the power of eminent domain  expressed by
      the  condemnor  in any  writing  as well as by the filing of any action or
      proceeding  for such  purpose by any  entity  having the right of power of
      eminent  domain,  and shall include a voluntary sale by Lessor to any such
      entity,   either  under  threat  of  condemnation  or  while  condemnation
      proceedings are pending,  and  "condemnation"  shall occur upon the actual
      taking of possession by the condemnor.  In the event the demised  premises
      or  any  part  thereof  is  condemned  and  such  condemnation  materially
      interferes  with  Lessee's use of the demised  premises,  this Lease shall
      terminate,  and Lessor and Lessee  shall be entitled  to their  respective
      interests in the amount of any award made as provided below, regardless of
      whether  the  award  is based on a  single  award or a  separate  award as
      between  Lessor and Lessee.  Lessor shall turn over to Lessee that portion
      of any such award received by Lessor  hereunder  which is  attributable to
      Lessee's  fixtures and  equipment  which are condemned as part of the real
      property but which Lessee would  otherwise be entitled to remove,  and the
      appraisal of the court,  or the condemning  entity if the  condemnation is
      not  determined by a court,  of the amount of any such award  allocable to
      such items shall be conclusive. If the total award be fixed by negotiation
      and be  greater  than  the  condemning  entity's  appraisal,  the  portion
      attributable  to  Lessee's  fixtures,   equipment  and  personal  property
      aforesaid  shall  be the  same  proportion  of the  actual  award  as said
      fixtures and equipment were of the entity's  appraisal.  Lessor shall also
      turn over to Lessee  the  portion of any such  award  attributable  to any
      improvements  constructed at the expense of Lessee.  If such  condemnation
      does not  materially  interfere  with Lessee's use of the  premises,  this
      Lease shall continue except that rental shall be reduced for the remainder
      of the term of this Lease, as may be extended, in proportion to the amount
      of the premises  condemned,  using the square footage of the building as a
      base. In such event Lessor, at Lessor's expense,  shall repair and remodel
      the remainder of the premises so that the  remaining  premises can be used
      effectively by Lessee.  If Lessor's portion of the award is not sufficient
      to repair and remodel then Lessee shall reimburse  Lessor for the costs of
      such repairs and remodeling to the extent they exceed Lessor's  portion of
      the award in the same manner  provided in the last  sentence of  Paragraph
      23."

 4. Phase II Lease: Condemnation. The entire Paragraph 23 of the Phase II Lease,
said section being entitled "CONDEMNATION",  is hereby deleted from the Phase II
Lease, and in its stead is inserted the following:

      "23. CONDEMNATION.  The word "condemnation" or "condemned" as used in this
      Lease shall mean the exercise of the power of eminent domain  expressed by
      the  condemnor  in any  writing  as well as by the filing of any action or
      proceeding  for such  purpose by any  entity  having the right of power of
      eminent  domain,  and shall include a voluntary sale by Lessor to any such
      entity,   either  under  threat  of  condemnation  or  while  condemnation
      proceedings are pending,  and  "condemnation"  shall occur upon the actual
      taking of possession by the condemnor.  In the event the demised  premises
      or  any  part  thereof  is  condemned  and  such  condemnation  materially
      interferes  with  Lessee's use of the demised  premises,  this Lease shall
      terminate  and Lessor and Lessee  shall be  entitled  to their  respective
      interests in the amount of any award made as provided below, regardless of
      whether  the  award  is based on a  single  award or a  separate  award as
      between  Lessor and Lessee.  Lessor shall turn over to Lessee that portion
      of any such award received by Lessor  hereunder  which is  attributable to
      Lessee's fixtures,  equipment and personal property which are condemned as
      part of the real property but which Lessee would  otherwise be entitled to
      remove,  and the appraisal of the court,  or the condemning  entity if the
      condemnation is not determined by a court, of the amount of any such award
      allocable to such items shall be  conclusive.  If the total award be fixed
      by negotiation and be greater than the condemning entity's appraisal,  the
      portion attributable to Lessee's fixtures and equipment aforesaid shall be
      the same  proportion of the actual award as said  fixtures,  equipment and
      personal property were of the entity's  appraisal.  Lessor shall also turn
      over  to  Lessee  the  portion  of  any  such  award  attributable  to any
      improvements  constructed at the expense of Lessee.  If such  condemnation
      does not  materially  interfere  with Lessee's use of the  premises,  this
      Lease shall continue except that rental shall be reduced for the remainder
      of the term of this Lease, as may be extended, in proportion to the amount
      of the premises  condemned,  using the square footage of the building as a
      base. In such event Lessor, at Lessor's expense,  shall repair and remodel
      the remainder of the premises so that the  remaining  premises can be used
      effectively by Lessee.  If Lessor's portion of the award is not sufficient
      to repair and remodel then Lessee shall reimburse  Lessor for the costs of
      such repairs and remodeling to the extent they exceed Lessor's  portion of
      the award in the same manner  provided in the last  sentence of  Paragraph
      22."

5. Phase I Lease:  Destruction of Premises. The entire Paragraph 23 of the Phase
I Lease,  said section  being  entitled  "DESTRUCTION  OF  PREMISES",  is hereby
deleted from the Phase I Lease, and in its stead is inserted the following:

     "23. DESTRUCTION OF PREMISES. If the building on the premises is damaged or
     destroyed by fire,  earthquake,  acts of God, the elements or as the result
     of faulty  construction  or  design,  Lessee  shall give  immediate  notice
     thereof to Lessor and the monthly rent due hereunder  shall be  immediately
     reduced by an amount equal to the amount of rent per square foot to be paid
     hereunder  multiplied by the number of unusable square feet of floor space.
     If any such damage or  destruction  is covered by  insurance as provided in
     Paragraph  19 hereof,  Lessor  shall,  at Lessor's  sole cost and  expense,
     repair the damage as soon as  possible  after such  damage or  destruction;
     provided,  however,  that if such damage or destruction exceeds thirty-five
     percent (35%) of the  replacement  value of the building,  either party may
     terminate  this  Lease  within  thirty  (30)  days  after  such  damage  or
     destruction.  If neither party has terminated  this Lease, or the damage or
     destruction is less than said  thirty-five  percent (35%),  Lessor shall be
     responsible  for  reconstruction  as above  provided  and  Lessor  shall be
     entitled  to all  real  property  insurance  proceeds.  If  this  Lease  is
     terminated,  the parties shall be entitled to the insurance proceeds in the
     same manner that they are entitled to the condemnation award as provided in
     Paragraph 24 hereof. If a damage or destruction caused by fire, earthquake,
     acts of God or the  elements  is not  covered by  insurance  as provided in
     Paragraph 19 hereof,  Lessor shall at Lessor's sole cost and expense repair
     the damage as soon as possible after such damage or destruction;  provided,
     however,  that if such damage or destruction  exceeds  thirty-five  percent
     (35%) of the replacement value of the building,  either party may terminate
     this Lease  within  thirty (30) days after such damage or  destruction.  If
     neither party has  terminated  this Lease,  or the damage or destruction is
     less than said thirty-five  percent (35%),  Lessor shall be responsible for
     reconstruction   as  above   provided,   but  Lessor's   expense  for  said
     reconstruction,  said expense  being the  construction  costs as defined in
     Exhibit  C to the  Phase III Lease  between  the  parties  and of even date
     herewith,  shall be  repaid  to  Lessor  by  Lessee  in equal  installments
     amortized  over the  remaining  term of this Lease,  including  any options
     exercised by Lessee,  including interest at a rate of two percent (2%) over
     the  best  rate  obtainable  by  Lessor  for  funds  used to  finance  such
     reconstruction."

6. Phase II Lease: Destruction of Premises. The entire Paragraph 22 of the Phase
II Lease,  said section being  entitled  "DESTRUCTION  OF  PREMISES",  is hereby
deleted from the Phase II Lease, and in its stead is inserted the following:

"22.  DESTRUCTION  OF  PREMISES.  If the  building on the premises is damaged or
destroyed  by fire,  earthquake,  acts of God,  the elements or as the result of
faulty  construction  or design,  Lessee shall give immediate  notice thereof to
Lessor and the monthly rent due  hereunder  shall be  immediately  reduced by an
amount  equal  to the  amount  of rent  per  square  foot  to be paid  hereunder
multiplied  by the number of unusable  square feet of floor  space.  If any such
damage or  destruction  is covered by  insurance  as  provided in  Paragraph  18
hereof,  Lessor shall,  at Lessor's sole cost and expense,  repair the damage as
soon as possible after such damage or destruction;  provided,  however,  that if
such damage or destruction exceeds thirty-five percent (3570) of the replacement
value of the building,  either party may terminate this Lease within thirty (30)
days after such damage or  destruction.  If neither  party has  terminated  this
Lease, or the damage or destruction is less than said thirty-five percent (35%),
Lessor shall be responsible for  construction as above provided and Lessor shall
be  entitled  to  all  real  property  insurance  proceeds.  If  this  Lease  is
terminated,  the parties shall be entitled to the insurance proceeds in the same
manner that they are entitled to the condemnation award as provided in Paragraph
23 hereof. If a damage or destruction caused by fire, earthquake, acts of God or
the  elements is not covered by  insurance  as provided in  Paragraph 18 hereof,
Lessor  shall at  Lessor's  sole cost and  expense  repair the damage as soon as
possible  after such  damage or  destruction;  provided,  however,  that if such
damage or destruction exceeds thirty-five percent (35%) of the replacement value
of the building,  either party may terminate  this Lease within thirty (30) days
after such damage or destruction. If neither party has terminated this Lease, or
the damage or destruction is less than said  thirty-five  percent (35%),  Lessor
shall be responsible for reconstruction as above provided,  but Lessor's expense
for said reconstruction, said expense being the construction costs as defined in
Exhibit C to the Phase III Lease between the parties and of even date  herewith,
shall be repaid to Lessor  by Lessee in equal  installments  amortized  over the
remaining  term of this  Lease,  including  any  options  exercised  by  Lessee,
including  interest at a rate of two percent (2%) over the best rate  obtainable
by Lessor for funds used to finance such reconstruction."

7. Phase I Lease and Phase II Lease: Arbitration. The
following paragraph is added to both the Phase I Lease and the
Phase II Lease:

 " ARBITRATION.  In each case where there is a dispute between the parties under
this Lease, the dispute shall be settled by arbitration.  Such arbitration shall
be  determined  as  provided  in this  paragraph  and all  arbitrators  shall be
disinterested persons of at least ten years' experience in an executive capacity
in the active  management of major real  properties  in the Northern  California
Area.  The party desiring such  arbitration  shall give notice to that effect to
the other party,  specifying  in said notice the name and address of such person
designated to act as arbitrator on its behalf. Within twenty (20) days after the
service of such  notice,  the other  party  shall give notice to the first party
specifying the name and address of the person designated to act as arbitrator on
its  behalf.  If the  second  party  fails  to  notify  the  first  party of the
appointment  of its  arbitrator,  as  aforesaid,  within  or by the  time  above
specified,  then the appointment of the second  arbitrator  shall be made in the
same manner as hereinafter provided for the appointment of a third arbitrator in
a case where the two arbitrators  appointed hereunder and the parties are unable
to agree upon such appointment.  The arbitrators so chosen shall meet within ten
(10) days after the second arbitrator is appointed.  If the said two arbitrators
shall  not agree  upon the  decision  to be made in such  dispute,  they  shall,
themselves,  appoint a third  arbitrator  who shall be a competent and impartial
person;  and in the event of their failure to make such decision to appoint such
arbitrator within ten (10) days after their meeting,  the third arbitrator shall
be selected by the parties themselves if they can agree thereon within a further
period of fifteen (15) days. If the parties do not so agree,  then either party,
on behalf of both,  may request  the then  presiding  judge of any Court  having
jurisdiction thereof to appoint such third arbitrator, and the other party shall
not raise any question as the Court's full power and  jurisdiction  to entertain
the  application  and make the  appointment and the person so appointed shall be
the third  arbitrator.  The decision of the arbitrators so chosen shall be given
within a period  of  thirty  (30)  days  after  the  appointment  of such  third
arbitrator.  The decision in which any two of the  arbitrators  so appointed and
acting  hereunder  concur shall in all cases be binding and conclusive  upon the
parties.  Each  party  shall  pay the  fees and  expenses  of the one of the two
original  arbitrators  appointed  by such  party,  or in  whose  stead  as above
provided such  arbitrator was appointed,  and the fees and expenses of the third
arbitrator,  if any, shall be borne equally by both parties. Except as otherwise
provided in this Lease,  said arbitration  shall be conducted in accordance with
the rules then obtaining of the American Arbitration  Association,  and judgment
upon any  arbitration  decision  rendered  may be  entered  by any Court  having
jurisdiction thereof. 8. Continuing  Obligations.  Except as amended herein, the
Phase I Lease and the Phase II Lease shall remain in full force and effect.

IN WITNESS  WHEREOF,  the parties have entered this  Agreement as of the day and
year first above written in one or more copies.

"Tenant"

AMDAHL CORPORATION

By /s/ Gene M. Amdahl
Chairman of the Board

Approved: Amdahl Facilities Manager

By /s/ Don L. Beck

"Landlord"

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato by Carl E. Berg her Attorney in Fact
SUSAN R. SOBRATO

/s/ Carl E. Berg
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

/s/ Ann S. Russo
ANN S. RUSSO





                                ADDENDUM TO LEASE

THIS ADDENDUM TO LEASE,  executed in duplicate as of the 7th day of June,  1979,
between JOHN A. SOBRATO and SUSAN R. SOBRATO, a married couple; CARL E. BERG and
MARY ANN BERG, a married couple, (hereinafter collectively called "Lessor"), and
AMDAHL CORPORATION, a Delaware corporation (hereinafter called "Lessee").

WITNESSETH

A.  Lessor  and Lessee  entered  into that  certain  lease  (hereinafter  called
"Lease")  dated April 3, 1979,  whereby  Lessor leased unto Lessee those certain
premises  situated in the City or Santa Clara,  County of Santa Clara,  State of
California,  and described as follows,  to wit; that property  which is shown as
Parcel 1 on that certain Parcel Map recorded April 13, 1979 in Book 439 of Maps,
at  Pages  17 and  18,  Official  Records  of  Santa  Clara  County  (comprising
approximately  7.365  acres)  together  with the  improvements  consisting  of a
two-story  office  building  which office  building  shall  contain at least one
hundred twenty-eight thousand (128,000) gross square feet.

B. Lessor and Lessee desire to amend the Lease as hereinafter provided.

NOW,  THEREFORE,  IN  CONSIDERATION  of the mutual covenants and promises of the
parties, the parties hereto agree as follows:

1. Witnesseth. Monthly Rental. The rental of Sixty Thousand Dollars ($60,000.00)
per month payable on the first day of each calendar month throughout the term of
the Lease,  as set forth on Page 5 of the Lease, is hereby changed amended to be
seventy-three thousand six hundred ninety-two ($73,692.00) per month.

2. Paragraph 34. Rental  Increases.  Paragraph 34 of the Lease is hereby deleted
and replaced by the following language:

      "The monthly  rental for each five (5) year period during which this Lease
      remains in force and effect,  commencing  with the sixth (6th) year of the
      Lease,  shall  increase by the amount  equal to seven  percent (7%) of the
      monthly  rental  payable  during  the  five (5)  year  period  immediately
      preceding each such period."

3. Lease. Except as specifically modified and amended by this Addendum to Lease,
the Lease shall  remain in full force and effect upon the terms,  covenants  and
conditions contained in the Lease.

IN WITNESS  WHEREOF,  the parties hereto have executed this Addendum to Lease in
one (1) or more copies on the day and year first above written. "Lessor"

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato by John A. Sobrato her Attorney in Fact
SUSAN R. SOBRATO

/s/ Carl E. Berg by John A. Sobrato his Attorney in Fact
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

"Lessee"

AMDAHL CORPORATION

By /s/ Don L. Beck
Its Facilities Manager




June 7, 1979

Mr. John A. Sobrato
Sobrato-Berg Properties
III20700 Valley Green Drive
Cupertino, California 95014

Re: Letter Agreement Modifying Lease

Dear John:

This Letter  Agreement shall serve as a modification  of the lease  (hereinafter
called "Lease")  between JOHN A SOBRATO and SUSAN R. SOBRATO,  a married couple,
CARL E.  BERG and MARY ANN  BERG,  a married  couple  (hereinafter  collectively
called  "Lessor")  and  AMDAHL  CORPORATION  (hereinafter  called  "Lessee"),  a
Delaware  corporation,  which  Lease is dated  April 3, 1979 and amended per the
Addendum  to Lease dated even date  herewith,  whereby  Lessor  leased to Lessee
certain premises  (hereinafter called "Premises")  situated in the City of Santa
Clara, County of Santa Clara, State of California, the Premises being located on
the property described in Exhibit A to the Lease. Lessor and Lessee hereby agree
to the following modifications and understandings to and regarding the Lease,

1.  Lessor  shall be  responsible  for  construction  of the office  building as
provided  for in the Lease.  Lessee  shall have the right to approve the design,
materials,  subcontractors,  materialmen,  all  contracts  and  all  expense  of
construction prior to Lessor contracting for, performing or paying for same.

2. Except as provided in Paragraphs 5 and 6 hereof, notwithstanding,  the rental
amount of seventy-three  thousand seven hundred twelve ($73,712.00) per month to
be payable by Lessee to Lessor as set forth in the  WITNESSETH of the Lease,  as
amended by the Addendum to Lease,  the monthly  rental for the Premises shall be
calculated by fully amortizing the Construction  Costs, as hereinafter  defined,
over  twenty  (20)  years at the loan  constant  equal to the  interest  rate on
Lessor's  permanent  financing on the Premises plus a rental constant of one and
one-half percent (1-1/2%). (For example, assuming the Construction Costs are One
Million  Dollars  ($1,000,000.00),  and assuming  the interest  rate on Lessor's
permanent  financing is nine and one-half percent  (9-1/2%),  the monthly rental
would be calculated by fully amortizing One Million Dollars ($1,000,000.00) over
twenty (20) years at eleven percent (11%) payable  monthly and would be equal to
Ten  Thousand  Three  Hundred   Twenty-One   Dollars  and   Eighty-Eight   Cents
($10,321.88) per month).

3. Lessor,  at Lessor's sole expense,  shall be responsible for the Construction
Costs,  as  hereinafter  defined,  except as provided in Paragraph 5 hereof.  4.
Construction  Costs  shall  include,  but  shall  not be  limited  to,  fees  to
independent   contractors  working  on  construction  of  the  office  building,
materials for the office  building,  title insurance  premiums,  architects' and
engineers' fees for development of plans for the office building,  and City fees
and permit  charges,  all  necessary  bonds and  insurance  policies,  costs for
interest on the construction during the course of construction, including points
for commitments  therefor,  the cost of the land underlying the Premises (at the
rate of Five Dollars ($5.00) per square foot), interest at the prime rate on the
coat of the land  underlying  the Premises (at the rate of Five Dollars  ($5.00)
per square foot) during  construction  only, costs of permits,  any construction
fees or area fees of the City of Santa  Clara,  any taxes on the land during the
construction  period,  any costs to extend utility service to the property,  and
the  cost of soil  tests,  on-site  supervision  costs,  and  fee to  Lessor  of
$100,000.00 percent (1.925%) for management fees,  exclusive of Lessor's one and
925/100 percent (1.925%) management fee.

5.  Lessee,  at  Lessee's  sole  expense,  shall be  responsible  for all of the
Construction  Costs,  as defined in  Paragraph  4, in excess of Six  Million One
Hundred Seventy Thousand Dollars  ($6,170,000.00)  provided,  however,  such Six
Million One Hundred  Seventy  Thousand  Dollar  ($6,170,000.00)  amount shall be
increased to Six Million Eight Hundred  Thousand  Dollars  ($6,800,000.00),  and
Lessor shall then be  responsible  for such Six Million Eight  Hundred  Thousand
Dollars  ($6,800,000.00)  sum of Construction Costs, if Lessor is able to secure
permanent  financing in the amount of Six Million Eight Hundred Thousand Dollars
($6,800,000.00) pursuant to either of the following subparagraphs.

(a) In the event Lessor is able to obtain  permanent  financing in the amount of
Six Million Eight Hundred Thousand Dollars  ($6,800,000.00)  at an interest rate
lese than nine and  three-quarters  percent (9-3/4%)  amortized over thirty (30)
years;  in such case the monthly  rental for the Premises shall be calculated as
provided in Paragraph 2 hereof.

(b) In the event Lessor is unable to obtain permanent financing in the amount of
Six Million Eight Hundred Thousand Dollars  (86,800,000.00)  at an interest rate
of less than nine and three quarters  percent (9-3/4%) prior to October 1, 1979,
but Lessor is able to obtain  permanent  financing  in the amount of Six Million
Eight Hundred  Thousand Dollars  ($6,800,000.00)  at a higher but still the best
interest rate available to Lessor  amortized over a thirty (30) year period.  In
such case, at the sole option of Lessee,  monthly  rental for the Premises shall
be determined by the following formula:

      The initial monthly rental for the Premises shall be Lessor's monthly debt
      service  payment  under said  permanent  financing  multiplied  by one and
      one-quarter (1-1/4/1. 25).

6. In the event any permanent  financing obtained by Lessor includes a provision
allowing  the lender to call the  maturity of the  permanent  loan (and  thereby
achieve total repayment of the permanent loan) prior to thirty (30) years and if
the lender exercises such right, the monthly rental for the Premises,  effective
on the date of such refinancing shall be recalculated according to the following
formula:

      X + (B-A) = New Monthly Rental

      X = the monthly rental payable during the immediately  preceding  calendar
      month as it may have been increased pursuant to Paragraph 34 of the Lease.

      A = one-twelfth (1/12) of the number of dollars equal to the interest rate
      on Lessor's previous permanent  financing  multiplied by the then existing
      outstanding  principal balance under such permanent  financing at the time
      of total repayment of such financing.

      B = one-twelfth (1/12) of the number of dollars equal to the interest rate
      on Lessor's  replacement  permanent  financing  multiplied by the existing
      outstanding  principal balance under Lessor's previous permanent financing
      at the time of total repayment of such financing.

Provided,  however,  in no instance  shall the monthly  rental for the  Premises
after such recalculation be less than "X" in the above formula.

7. Lessee shall have access to all of Lessor's records and accounts  relating to
construction of the office building and the Construction Costs at all times, and
Lessee shall have the right to audit such books and records at any time.  Lessor
shall deliver to Lessee, prior to execution, all contracts and plans, and Lessor
shall obtain Lessee's approval of all contracts and plans prior to execution and
implementation  of  same.  Lessor  shall  obtain  standard  warranties  from all
contractors, subcontractors and materialmen. Lessee shall have the right to make
changes in the Plans, as defined in the Lease, at any time;  provided,  however,
in the  event  any  such  Lessee'  changes  in the  Plans  delay  the  scheduled
completion  data of the project beyond  December 1st, 1997 and such delay is not
attributable to any cause or event other than Lessee's  changes in the Pans, the
commencement  date of the Lease  with  regard to monthly  rent only shall  occur
earlier  than as  defined in the Lease by the number of days equal to the number
of days of delay in the scheduled completion date of the project beyond December
1, 1997 which are solely attributable to Lessee's changes in the Plans.

8.  Lessor  agrees to use  Lessor's  best  efforts  to get the  lowest  possible
interest rate on any permanent financing on the Premises or any financing on the
Premises  referred to herein or in the Lease;  provided,  however,  Lessee shall
have the right to provide any such financing if Lessee is able to obtain a lower
interest rate on any such financing.

9.  Notwithstanding  anything  to  the  contrary  in  the  WITNESSETH,  Lessor's
obligation to repair  defects in the materials  and  construction  of the office
building and any other improvements constructed by Lessor pursuant to the Lease,
shall  include all patent and latent  defects in the office  building  and other
improvements  constructed  by Lessor  pursuant  to Lease,  but shall not include
repairs required due to ordinary wear and tear or repairs required due to damage
caused by Lessee.  10.  Lessee hereby  authorized  Lessor to apply for permanent
financing from Mutual of New York on the following terms:

      1. Amount - $6,800,000.00.

      2. Amortization Term - Thirty (30) years.

      3. Lender Call Privilege fifteen (15) years.

      4.  Interest  Rate - 10% with lender  right to increase up to 10 1/4% upon
      California usury law 10% Limitation being changed.

      5. Rent Coverage Over Monthly Debt Service Charge - 1.25.

Lessor's loan  application in conformance  with the foregoing  shall be attached
hereto within thirty (30) days after Lessor's application.

In the event the interest rate under the above authorized permanent financing is
actually  increased  by the  lender  to 10  1/4%,  effective  on the day of such
increase in the interest  rate,  the monthly  rental for the  Premises  shall be
recalculated under Paragraph 5 (b) (1) hereof.

IN WITNESS  WHEREOF,  the parties hereto have executed  two(2) or more copies of
the Letter Agreement on June 7, 1979.

"Lessor"

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato by John A. Sobrato her Attorney in Fact
SUSAN R. SOBRATO

/s/ Carl E. Berg by John A. Sobrato his Attorney in Fact
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

"Lessee"

AMDAHL CORPORATION

By /s/ Don L. Beck
Its Facilities Manager





                                      LEASE

THIS LEASE,  executed in duplicate as of the 7th day of June, 1979, between JOHN
A. SOBRATO and SUSAN R.  SOBRATO,  a married  couple;  CARL E. BERG and MARY ANN
BERG, a married  couple,  hereinafter  collectively  called  Lessor,  and AMDAHL
CORPORATION, a Delaware corporation, hereinafter called Lessee. WITNESSETH: that
Lessor does  hereby  lease unto Lessee and Lessee does hereby hire and take from
Lessor those  certain  premises  situated in the City of Santa  Clara,  State of
California,  and described as follows,  to wit: that property  which is shown as
Parcel __ (comprising  approximately  7.565 acres) on the map attached hereto as
Exhibit "A",  and made a part  hereof,  the precise  legal  description  of said
premises to be attached hereto as part of Exhibit "A", within sixty (60) days of
the date hereof, said legal description to be first approved by Lessee, together
with the  improvements  consisting of a two-story  office  building which office
building shall contain at least one hundred twenty-five thousand (125,000) gross
square  feet.  The office  building  shall be  constructed  on the  premises  by
independent  contractors to be employed by and under the  supervision of Lessor,
as general contractor, in accordance with the plans and specifications ("Plans")
to be prepared by Lessor,  all such  construction to be at the expense of Lessor
and Lessee as provided in a separate Letter Agreement between Lessor and Lessee.
Such Plans are subject to the reasonable approval of lessee and will be attached
hereto as Exhibit "B", at such time,  and made a Part hereof.  Lessee shall have
the right to approve all contractors,  subcontractors and materialmen as well as
the design,  materials and  workmanship of the  construction.  Lessee shall also
have the  right  to  approve  all  expenses  relating  to  construction  of said
improvements before Lessor has contracted for same.

This Lease  shall not  become  effective  and the lease term shall not  commence
unless  and until the  two-story  office  building,  consisting  of at least one
hundred  twenty-five  thousand (124,000)  enclosed,  gross square feet, is Fully
Complete and Ready for Occupancy,  as defined herein. If such office building is
not Fully  Complete and Ready for Occupancy by November 1, 1979 (extended by the
length of a delay, directly caused by strikes, acts of God or by any other cause
which is both  beyond the  reasonable  control of Lessor and not now  reasonably
foreseeable by Lessor), Lessee, at its option, shall have the right to terminate
this  Lease and  Lessor  shall  refund to Lessee any and all sums which may have
been paid by Lessee to Lessor  prior to such  time.  Lessee  shall also have the
right to  terminate  this Lease and receive any and all sums which may have been
paid by Lessee  to Lessor  prior to such  time if the  landscaping  relating  to
Parcel __ or any remaining work on the office building exterior is not completed
in accordance with all of the applicable Plans within sixty (60) days after such
building is Fully Complete and Ready for Occupancy or if the required attachment
to Exhibit "A" hereto has not been attached within the time  prescribed  herein.
"Fully  Complete  and Ready for  Occupancy"  shall  mean that (i) all  necessary
governmental approvals, permits, consents and certificates have been obtained by
or for Lessor for the lawful construction by Lessor, and occupancy by Lessee, of
said premises and  improvements,  excluding work  attributable to trade fixtures
and any special  fit-up  requested by Lessee,  but including the  certificate of
occupancy  for said  Premises and  improvements  unless  Lessee has occupied the
premises and improvements  prior to Lessor's receipt of such  certificate,  (ii)
all of the building interior fully meets all of the applicable Plans,  (iii) all
of the building exterior  substantially  meets the applicable  Plans,  including
paved  parking  areas,  and (iv) said  building  interior  is in  "broom  clean"
finished  condition.  Notwithstanding  anything to the contrary  herein,  Lessor
warrants that there shall be no defects in the materials or  construction of the
office  building and any other  improvements  constructed  by Lessor as provided
herein,   and  Lessor  shall  repair  any  such  defects  in  the  materials  or
construction  of the office building and any other  improvements  constructed by
Lessor as provided  herein if any such defects are  discovered  within seven (7)
years after the  commencement  of the term of this Lease.  Lessor  shall also be
responsible  for the  enforcement of any customary or expressed  warranties from
any subcontractors, material or equipment supplier, architect and engineer.

The term shall be for twenty  (20)  years,  subject to the  renewal  options set
forth in Paragraph 33 hereof. Unless Lessee has theretofore elected to terminate
this Lease,  as provided  hereinabove,  the term shall  commence when the office
building is Fully  Complete and Ready for  Occupancy  and (i) Lessee has entered
into  occupancy  of  the  office  building  or  (ii)  Lessor  has  received  the
certificate of occupancy for the office  building,  whichever shall occur first.
Rental shall be payable in lawful money of the United  States of America,  which
Lessee  agrees to pay to  Lessor  without  deduction,  setoff or demand at 20700
Valley Green Drive, Cupertino,  California 95014, or such place or places as may
be  designated  in  writing  from  time  to  time  by  Lessor,  in  advance,  in
installments as follows: The rental shall be Sixty Thousand Dollars ($60,000.00)
per month payable on the 1st day of each calendar  month  throughout the term of
this Lease,  subject to modification as provided in a separate Letter  Agreement
between Lessor and Lessee.

It is further mutually agreed between the parties as follows:

1.  USE AND  POSSESSION.  The  premises  and  improvements  are to be  used  for
administrative  offices,  engineering,   research,   development,   warehousing,
receiving  and  inspecting,   manufacturing,   shipping,  employees'  cafeteria,
assembly of computer-oriented  electronic equipment and any other legal uses. If
Lessee with Lessor's  consent takes possession prier to the commencement of said
term,  Lessee shall do so subject to all the covenants and conditions hereof and
shall pay rent for the period ending with the  commencement  of the said term at
the same monthly rate as that  prescribed  for the first month of the said term,
subject to  proration  as Provided in the  WITNESSETH.  Any such early taking of
possession  shall  not be  deemed a formal  acceptance  of the  premises  and/or
improvements  as being Fully  Complete and Ready for  Occupancy and shall not be
deemed a waiver of any of Lessee's rights hereunder.  2. HOLDING OVER. If Lessee
holds  possession  hereunder after the expiration of the term of this Lease with
consent of Lessor,  Lessee shall become a tenant from month to month upon all of
the terms and conditions herein specified.

3. ENTRY BY LESSOR.  Following  reasonable  notice,  and when  accompanied by an
employee of Lessee, Lessor and the agents and employees of Lessor shall have the
right to enter upon said premises at all reasonable times to inspect the same to
see that no  damage  has been or is done and to  Protect  any and all  rights of
Lessor and to post such  reasonable  notices as Lessor may desire to protect the
rights of the Lessor.  Lessor may for a Period commencing ninety (90) days prior
to the end of the lease term, or any extension  thereof,  have reasonable access
to the premises for the purpose of exhibiting  the same to  prospective  tenants
and may place upon said  premises any usual or ordinary "for sale" or "to lease"
signs.

4.  CONDITION  AND REPAIRS.  Subject to the  WITNESSETH  hereinbefore  provided,
Lessee shall at Lessee's  sole cost and expense,  maintain,  repair and keep the
interior and exterior of the  premises,  including  the roof and all  structural
components,  and each and  every  part  thereof  and all  appurtenances  thereto
(including,  without limitation,  sidewalks fronting thereon,  wiring, plumbing,
sewage system, heating and air cooling installations,  glazing and skylights, in
or bordering  the premises and any store  front),  in good  condition and repair
during  the  term  of  this  Lease;  damage  thereto  by wear  and  tear,  fire,
earthquake, acts of 50d or the elements, other casualties and defects in design,
materials and  construction  excepted.  In the event Lessee should fail to start
the repairs required of Lessee forthwith upon thirty (30) days written notice by
Lessor, Lessor, in addition to all other remedies available hereunder or by law,
and  without  waiving  any  alternative  remedies,  may make the same and Lessee
agrees to repay Lessor as additional rent the cost as Part of the rental Payable
on the next day upon which rent becomes due.  Lessee agrees upon the  expiration
of the term of this Lease or sooner termination to surrender the Premises in the
same condition as received;  ordinary wear and tear, fire,  earthquake,  acts of
God or the  elements,  other  casualties  and defects in design,  materials  and
construction excepted. In the event that any alterations, repairs or acts of any
kind shall be required to be done by reason of Lessee's  occupancy in connection
with the premises or any part thereof under the provisions of any law, ordinance
or rule  now in force or  hereafter  enacted  by  municipal,  state or  national
authority,  the sane shall be made at the cost and  expense  of  Lessee.  Lessee
shall maintain the landscaping.  All vinyl wall surfaces are to be maintained in
as good a condition as when Lessee took  possession  free of holes,  gouges,  or
defacements.  Lessee to limit attachments to vinyl wall surfaces  exclusively to
V-joints with no larger than #6 screws.

All  repairs,  alterations  and  improvements  that may be  required  under-this
Paragraph 4 shall be done at the cost and expense of Lessee.  Lessee will at all
times permit any proper notices, including proper notices of non-responsibility,
to be posted and to remain posted until the  completion  and  acceptance of such
work.

5. WASTE AND  ALTERATIONS.  Lessee shall not commit,  or permit to be committed,
any waste upon the said premises.  Lessee shall obtain Lessor's Written consent,
which consent shall not be unreasonably  withheld,  for any alteration or repair
costing more than Five Thousand Dollars (S5,000.00),  and no work shall commence
until two (2) days after Lessee receives Lessor's written consent. Lessor hereby
gives his consent to the installation and removal, upon termination, of computer
flooring paid for by Lessee.

Upon termination of this Lease,  Lessee may remove its property and Lessee shall
restore the  premises  to original  condition  at  Lessee's  expense.  Except as
otherwise provided herein, any property that is installed by Lessee after Lessee
takes Possession,  which has become an integral part of the building,  shall, if
agreed by Lessor  and  Lessee,  become  Lessor's  property.  In the event of any
subsequent  additions  or  alterations,  Lessee  agrees to restore  to  original
condition as existed when Lessee first occupied upon written  request of Lessor.
Lessee shall have the right to remove  trade  fixtures,  equipment  and personal
property at any time.

6.  ABANDONMENT.  Lessee  shall not vacate or 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,
subject to applicable  provisions  of law, at the option of Lessor,  except such
property as may be mortgaged by Lessee.

7.  ASSIGNMENT  AND  SUBLETTING.  Lessee may assign or sublet all or Part of the
premises  without  Lessor's  consent to a parent,  subsidiary,  affiliate  or in
connection  with a merger,  consolidation  or sale of  substantially  all of its
assets.

With respect to any other sublease or  assignment,  Lessee shall not assign this
Lease,  or any interest  therein,  and shall not sublet the said premises or any
part thereof, or any right or privilege appurtenant thereto, or suffer any other
person to occupy or use the said premises,  or any portion thereof,  without the
written  consent of Lessor first had and  obtained,  which  consent shall not be
unreasonably withheld, and a consent to one assignment,  subletting,  occupation
or use  by  any  other  person,  shall  not be  deemed  to be a  consent  to any
subsequent assignment, subletting, occupation or use by another Person. Any such
assignment or subletting  without such consent shall be void, and shall,  at the
option  of  the  Lessor,   terminate  this  Lease,   providing  Lessor  has  not
unreasonably  withheld  such  consent.  With  respect to any other  sublease  or
assignment  except as provided in the first  paragraph  of this  Paragraph 7, of
this lease, this Lease shall not, nor shall any interest therein, be assignable,
as to the interest of Lessee,  by operation of lay,  without the written consent
of Lessor, which shall not be unreasonably  withheld.  With respect to any other
sublease  or  assignment  except  as  provided  in the first  paragraph  of this
Paragraph  7, of this Lease,  if Lessee  desires to assign its rights under this
Lease or to sublet all or a part of the  premises,  Lessee  shall  first  notify
Lessor of the proposed  terms and  conditions of such  assignment or subletting;
and Lessor shall have the right  o(pound)  first  refusal to enter into a direct
lessor-lessee  relationship  with  such  party  under  such  proposed  terms and
conditions, in which event Lessee shall be relieved of its obligations hereunder
to the extent of the lessor-lessee  relationship entered into between Lessor and
such third party;  provided  that Lessor shall not have the above right of first
refusal if the term of a proposed  assignment  or sublease  including  option to
extend is for a term not in excess of five (5) years.

8. INDEMNIFICATION OF LESSOR.  Lessee shall, during the term of this [ease, save
harmless  Lessor  from any and all  loss,  damage,  claims of  damage,  demands,
obligations,  cause or causes of action,  or  liabilities  of any kind or nature
(including  reasonable  costs or attorneys fees if Lessor is made a party to any
action to which Lessee's indemnity runs hereunder), by reason of injury or death
of any person or persons or damage to any property of any kind and to whomsoever
belonging,  occurring  on the premises if caused by Lessee,  Lessee's  officers,
directors,  employees'  agents  subtenants  and assignees.  concessionaires  and
licensees,  except that Lessor  shall be liable to lessee for damages  resulting
from the acts,  willful  omissions or negligence of Lessor,  Lessor's  officers,
directors,  employees  and agents.  Lessor shall hold Lessee  harmless  from all
damages  arising  out of any  such  damage.  A  party's  obligation  under  this
Paragraph 8 to hold the other party  harmless shall be limited to any excess sum
over  insurance  proceeds,  if any,  received  by the party  being  indemnified'
including,  without  limitation,  all attorneys' fees and other litigation costs
and indemnified expenses incurred by the person.


9.  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,  or (c) any action taken or
suffered by Lessee under any  insolvency  or bankruptcy  act shall  constitute a
breach of this Lease by Lessee. Upon the happening of any such event, subject to
the applicable grace periods set forth in Paragraph 10 hereof,  this Lease shall
terminate  ten (10) days after  written  notice of  termination  from  Lessor to
Lessee.

10.  DEFAULT.  Any of the  following  events shall  constitute a default of this
Lease:

      (a) Failure to pay rent or any other sums due to Lessor upon the date when
      said payment is due, said failure continuing for a Period of ten (10) days
      after written notice of default;

      (b) Abandonment or vacation by Lessee of all of the
      premises;

      (c) A general assignment by Lessee for the benefit of creditors;

      (d) The filing of a  voluntary  petition  in  bankruptcy  by Lessee or the
      filing of an  involuntary  petition by Lessee's  creditors,  said petition
      remaining undischarged for a period of thirty (30) days;

      (e) The appointment of a receiver to take possession of substantially  all
      of Lessee's assets or of the leased premises,  said receivership remaining
      undissolved for a period of thirty (30) days;

      (f) Attachment,  execution or other judicial seizure of substantially  all
      of Lessee's assets or the premises,  such  attachment,  execution or other
      seizure remaining  undismissed or undischarged for a period of thirty (30)
      days after the levy thereof;

      (g) Failure to commence repairs,  required to be made by Lessee hereunder,
      within  thirty  (30) days after  written  notice  thereof  from  Lessor to
      Lessee;

      (h) Failure to perform any of Lessee's covenants  hereunder,  except those
      listed in items (a) through (h) above, said failure  continuing for thirty
      (30) days after  written  notice  thereof  from  Lessor to Lessee,  unless
      Lessee has in good faith commenced curing a breach of this Lease.

In the event of a default,  and in  addition  to all other  rights and  remedies
Lessor  may have at law,  Lessor  shall  have the option to do any or all of the
following:

      A. REENTRY.  Immediately  reenter and remove all Persons and Property from
      the  premises,  storing said  personal  property in a public  warehouse or
      elsewhere at the cost of and for the account of Lessee. No such reentry or
      taking of  possession  of the  premises by Lessor shall be construed as an
      election on his Part to terminate  this Lease,  unless a written notice of
      such intention is given by the Lessor to Lessee or unless the  termination
      thereof be decreed by a court of competent Jurisdiction.

      B. WITHOUT  TERMINATION  OF THE LEASE  PURSUE THE REMEDY  PROVIDED BY THIS
      LEASE AND CIVIL  CODE  SECTION  1951.  Without  termination  of the Lease,
      collect by suit or otherwise  each  installment of rent or other sum as it
      becomes due hereunder, or to enforce by suit or otherwise,  any other term
      or  provision  hereof  on the  part  of  Lessee  required  to be  kept  or
      performed,  it being specifically  agreed that all unpaid  installments of
      rent or other sums shall bear  interest at the highest legal rate from the
      due date thereof until paid.

      Without terminating the Lease, Lessor shall relet the premises or any part
      thereof for such term or terms (Which may be for a term  extending  beyond
      the term of this  Lease) and at such rental or rentals and upon such other
      terms  and  conditions  as Lessor in his  reasonable  discretion  may deem
      advisable with the right to make  alterations and repairs to said premises
      necessary for reletting.  upon such  reletting,  (i) Lessee is immediately
      liable to pay to Lessor,  in addition to any indebtedness  other than rent
      due  hereunder,  the  cost  and  expense  of  such  reletting,   including
      reasonable  expenses  to  prepare  the  premises  for such  reletting  and
      reasonable attorneys' fees and real estate commissions, and the amount; if
      any,  by which the rent  reserved  in this  Lease  for the  Period of such
      reletting (up to but not beyond the term of the Lease)  exceeds the amount
      agreed to be paid as rent by new Lessee for the demised  premises for such
      Period on such reletting,  or (ii) at the option of Lessor,  rent received
      by Lessor  for such  reletting  shall be  applied  first to payment of any
      indebtedness, other than rent due hereunder from Lessee to Lessor; second,
      to payment of any costs and expenses of such reletting;  third, to payment
      of rent due and unpaid hereunder;  and, the residue, if any, shall be held
      by lessor and  applied  in  payment  of future  rent as nay become due and
      Payable  hereunder.  If  Lessee  has  been  credited  with  any rent to be
      received  for  reletting  under  option  (i),  and such rent  shall not be
      promptly  Paid to Lessor by new Lessee,  or if such rentals  received from
      such reletting under option (ii) during any month be less than paid during
      that month by Lessee  hereunder,  Lessee shall pay any such  deficiency to
      Lessor. Such deficiency shall be calculated and paid monthly.

      PROVIDED,  HOWEVER,  that if the  Lessor  does  not  relet  said  premises
      himself,  then Lessee may sublet or assign his  interest in the Lease,  or
      both, pursuant to Paragraph 7 hereunder.

      Any  reasonable  expenses  incurred for  renovation  and alteration of the
      premises in order to put said  premises in condition  for occupancy by the
      assignee or sublessee of Lessee, shall be borne by Lessee.

      C.   TERMINATION  OF  THE  LEASE  PURSUANT   1951.2  OF  THE  CIVIL  CODE.
      Notwithstanding any such reletting without termination,  Lessor may at any
      time  thereafter  elect to  terminate  this  Lease  for any such  previous
      breach.  Should Lessor at any time terminate this Lease for any breach, in
      addition to any other remedy he may have,  he may recover from lessee,  at
      the time of award, any and all of the following damages:

           (i) All  unpaid  rent up to the time of  termination,  plus  interest
           thereon at the legal rate.

           (ii)  Between  the date of  termination  and the date of  award,  the
           difference between the unpaid rent and the amount of such rental loss
           that the Lessee proves  Lessor could  reasonably  have avoided,  plus
           interest thereon at the legal rate.

           (iii) The  discounted  present  value of the  difference  between the
           unpaid  rent for the  balance  of the term  after  the  award and the
           amount of such  rental loss the Lessee  proves the Lessor  could have
           reasonably  avoided.  The discount  rate shall be the prime  interest
           rate of the Federal  Reserve Bank of San Francisco,  plus one percent
           (1%).

           All of these amounts shall be immediately  due and payable at date of
           award, from the Lessee to Lessor. In addition to the amount recovered
           for  damages  for  loss of past and  future  rents,  Lessor  shall be
           entitled to recover reasonable expenses in retaking the property,  in
           making  repairs  Lessee  was  obligated  to make,  in  preparing  the
           property for reletting, and in reletting the property, and other such
           damages as  necessary  to  compensate  Lessor  for all the  detriment
           caused by Lessee, including, but not limited to, breaches of specific
           covenants  of the  Lease  such as the  promise  to  maintain  and the
           promise to restore the Premises on termination.

11.  SURRENDER  OF LEASE.  The  voluntary  or other  surrender  of this Lease by
Lessee, or a mutual cancellation thereof, shall not work a merger, and shall not
terminate all or any existing subleases or subtenancies, but shall operate as an
assignment to Lessor of any or all such subleases or subtenancies.

12. LITIGATION EXPENSES. If either party shall bring an action against the other
by reason of the  breach of any  covenant,  warranty  or  condition  hereof,  or
otherwise  arising out of this Lease,  whether for  declaratory or other relief,
the  prevailing  party in such suit shall be  entitled  to its costs of suit and
reasonable attorneys' fees, which shall be payable whether or not such action is
prosecuted to judgment.  Prevailing  party within the meaning of this  paragraph
shall  include,  without  limitation,  a party who brings an action  against the
other after the other's  default,  if such action is dismissed  upon the other's
payment of the sums  allegedly due or  performance  of the  covenants  allegedly
breached,  or if the plaintiff or  cross-complainant  obtains  substantially the
relief sought by it in the action.

13. UTILITIES. Lessee shall pay for all the water, sewage, fuel, gas, oil, heat,
electricity,  telephone, janitorial and landscape maintenance during the term of
this Lease.

14. LIENS. Lessee shall keep the premises and building of which the premises are
a part  free and clear of any liens  and  encumbrances  arising  out of any work
performed  or  materials  furnished  by or at the  direction of Lessee and shall
indemnify,  hold  harmless  and defend  Lessor  from any liens and  encumbrances
arising out of any work performed or materials  furnished by or at the direction
of  Lessee;  provided,   however  that  such  covenant  shall  not  include  any
construction done by Lessor.  In the event any such lien is filed,  Lessee shall
do all acts  necessary to discharge  any lien within thirty (30) days of filing,
or if lessee  desires to contest any such lien,  then Lessee shall  deposit with
Lessor one and  one-half  (1-1/2)  times the amount of said lien as security for
the payment of said lien claim or provide adequate bonding for such lien.

15.  TAXATION.  In addition to all other Payments  herein provided to be made by
Lessee and as additional  rental  hereunder,  Lessee agrees to pay to the County
tax  collector  prior  to  delinquency,  all real  property  taxes  and  special
assessments which have become or may become a lien upon the demised premises (or
are  otherwise  imposed or  assessed  on the  demised  premises)  or any portion
thereof or upon  improvements  thereon or improvements  added thereto during the
term of this Tease,  provided that any said taxes and assessments  shall be paid
over the  maximum  period  permitted  by law and Lessee  shall be liable on only
those  payments  due during the term  hereof.  If Lessee fails to pay such taxes
and/or assessments,  in addition to all other remedies Lessor has herein, Lessor
shall have the right to pay any or all of such taxes and/or  assessments  and to
recover  reimbursement  therefor from Lessee. Taxes and assessments for the year
in which this Lease  commences and for the year in which it terminates  shall be
equitably  prorated.  Lessee shall have the right to contest any  assessment  or
tax, and in the event that Lessee decides to attempt such contest,  Lessor shall
provide documents that are reasonably necessary to that end.

If at any time  during  the term of this Lease a tax or excise on rents or other
tax, however described, is levied or assessed against Lessor, as a substitute in
whole or in part for real property taxes assessed or imposed on premises, Lessee
shall pay  before  delinquency  such tax or excise on rents or such other tax to
the  extent  that such tax or excise  on rents or other tax is a  substitute  in
whole or in part for real property  taxes on the  premises.  In the event that a
tax or excise on rents is levied or assessed against Lessor,  as a substitute in
Whole or in part for taxes  assessed or imposed on the premises,  and the taxing
authority  takes the position that Lessee  cannot pay and discharge  such tax on
behalf of the Lessor,  then at the  election of Lessor,  Lessor may increase the
rent charged hereunder by the exact portion of such tax which is a substitute in
whole or in part for real property  taxes on the premises,  and Lessee agrees to
Pay said portion as additional rent at the time rental payments are due.

Lessee shall be liable for all taxes levied against personal Property, inventory
and bale fixtures.

16. USES  PROHIBITED.  Lessee shall not use, or permit said Premises or any part
thereof,  to be used,  for any  purpose or  purposes  other than the  purpose or
purposes for which the said premises are hereby leased; and no use shall be made
or permitted to be made of the said premises' nor acts done,  which will 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
said premises,  any article which may be prohibited by said insurance  policies.
Lessee  shall,  at  Lessee's  sole  cost and  expense,  comply  with any and all
requirements,  pertaining to said  premises,  of any insurance  organization  or
company,  necessary for the  maintenance of the  hereinafter  mentioned fire and
public liability insurance covering said building and appurtenances.

17. INSURANCE. Lessee shall maintain comprehensive public liability, plate glass
and property damage insurance to protect against any liability to the public, or
to any employee, agent or invitee of lessee or Lessor, incident to the use of or
resulting from any accident  occurring in or about the premises,  with limits of
liability of not less than One trillion  Dollars  (S1,000,000.00)  for injury to
one  Person,  Two  Million  Dollars  ($2,000,000.00)  for  injury to two or more
persons and Five Hundred Thousand Dollars ($500,000.00) for property damage. All
policies of insurance provided for herein shall:

      (a) Be written in  companies  authorized  to do  business  in the State of
      California,  and rated "AAA" Or better in Best's Insurance Reports,  or as
      specifically otherwise accepted by Lessor by written consent.

      (b) Be written as Primary policies of insurance and not contributing  with
      or in excess of any coverage which Lessor may carry, and cover, insure and
      name Lessor as an additional assured.

      (c) Contain an endorsement  requiring thirty (30) days.  written notice to
      Lessor prior to cancellation or any change in coverage.

During the term of this Lease,  Lessee, at its expense,  shall maintain in force
insurance  against loss or damage by fire to the  improvements  located upon the
leased  premises in the initial  amount of Five Million Eight  Hundred  Thousand
Dollars  ($5,800,000.00)  with  extended  and  vandalism  coverage  and  special
extended  Perils  ("all  risk"),  which  amount may be increased in future years
based upon bona fide appraised  increases in replacement cost.  However,  Lessee
need not purchase insurance covering damage due to earthquake.

Such  insurance  shall be  procured  from a  responsible  insurance  company  or
companies  authorized to dc business in California,  and the policies evidencing
such  insurance may be endorsed with a mortgagee's  loss payable  endorsement in
standard  form  and  shall  be  delivered  to  Lessor  (and  kept by  Lessor  or
encumbrancer),  and renewals  thereof  shall be delivered by Lessee to Lessor at
least thirty (30) days prior to their  respective  expiration dates and shall be
kept by Lessor or any encumbrancer.  Lessor shall be named as additional insured
on said  policies  which shall  provide  that Lessor be given  thirty (30) days'
notice of any nonpayment of premium or cancellation.

Each party shall cause each insurance  policy obtained by it to provide that the
insurance  company  waives all right of recovery by way of  subrogation  against
either  party in  connection  with any  damage  covered  by any  policy.  If any
insurance  policy  cannot  be  obtained  with a  waiver  of  subrogation,  or is
obtainable  only by the  payment  of an  additional  Premium  charge  above that
charged by insurance  companies  issuing  policies without waiver of subrogation
the Party  undertaking  to obtain the insurance  shall notify the other party of
this fact. The other party shall have a period of ten (10) days after  receiving
the  notice  either to place the  insurance  with a company  that is  reasonably
satisfactory  to the other party that will carry the insurance  with a waiver of
subrogation,  or to  agree to pay the  additional  premium  if such a policy  is
obtainable at additional  cost. If the insurance cannot be obtained or the party
in whose favor a waiver of subrogation is desired  refuses to pay the additional
premium  charged,  the other  party is relieved  of the  obligation  to obtain a
waiver of subrogation rights with respect to the particular insurance involved.

18. COMPLIANCE WITH GOVERNMENTAL REGULATIONS. Lessee shall, at his sole cost and
expense, comply with all of the requirements of all Municipal, State and Federal
authorities now in force pertaining to Lessee's occupancy of the premises.

19. EFFECTS OF CONVEYANCE. If Lessor is not in default of any of its obligations
hereunder,  the term "Lesser" as used in this Lease means only the owner for the
time being of the land and buildings  containing  the premises,  so that, in the
event of any sale of said land and buildings, or in the event of a lease of said
buildings,  the  transferring  Lessor shall be and hereby is entirely  freed and
relieved of all covenants and obligations of the lessor hereunder; provided that
the purchasing  Lessor of the buildings  assumes and agrees to carry out any and
all covenants and obligations of the Lessor hereunder.

20.  ADVERTISEMENTS  AND SIGNS.  Lessee shall not  inscribe,  paint or affix any
signs,  advertisements,  placecards  or awnings on the  exterior  or roof of the
premises or upon the entrance doors,  windows, or the sidewalk on or adjacent to
the  premises  without the prior  written  consent of Lessor.  Lessor  shall not
unreasonably withhold such consent. Any signs so placed on the premises shall-be
so placed upon the  understanding  and agreement that Lessee will remove same at
expiration or  termination of this Lease and will repair any damage or injury to
the premises  caused thereby,  and if not so removed by Lessee,  then Lessor may
remove it at Lessee's expense.

21.  DESTRUCTION  OF  PREMISES.  If the  building on the  premises is damaged or
destroyed  by fire,  earthquake,  act of God,  the  elements or as the result of
faulty  construction  or design,  Lessee shall give immediate  notice thereof to
Lessor and the monthly rent due  hereunder  shall be  immediately  reduced by an
amount  equal  to the  amount  of rent  per  square  foot  to be Paid  hereunder
multiplied  by the number of unusable  square feet of floor  space.  If any such
damage or  destruction  is covered by  insurance  as  provided in  Paragraph  17
hereof,  Lessor shall,  at Lessor's sole cost and expense,  repair the damage or
destruction  as soon as  possible  after such damage or  destruction;  provided,
however, that if such damage or destruction exceeds thirty-five percent (35%) of
the  replacement  value of the building,  either party may terminate  this [ease
within thirty (30) days after such damage or  destruction.  If neither party has
terminated  this  Lease,  or  the  damage  or  destruction  is  less  than  said
thirty-five  percent (35%),  Lessor shall be responsible for  reconstruction  as
above  provided,  and Lessor  shall be entitled to all real  property  insurance
proceeds.  If this Lease is terminated,  Lessor shall be entitled to receive all
real property  insurance  proceeds less the portion of such  insurance  proceeds
attributable  to Lessee's  equipment and Lessee's  improvements  which have been
paid for or installed by Lessee,  which  portion  shall be paid to Lessee.  If a
damage or destruction caused by fire, earthquake, acts of God or the elements is
not covered by insurance as provided in Paragraph 17 hereof,  Lessor  shall,  at
Lessor's sole cost and expense, repair the damage as soon as possible after such
damage or  destruction;  provided,  however,  that if such damage or destruction
exceeds  thirty-five  percent  (35%) of the  replacement  value of the building,
either party may terminate  this Lease within thirty (30) days after such damage
or destruction.  If a damage or destruction caused by fire, earthquake,  acts of
God or the  elements is not covered by  insurance  as provided in  Paragraph  17
hereof and neither party has terminated this Lease, or the damage or destruction
is less than said  thirty-five  Percent (35%),  Lessor shall be responsible  for
reconstruction as above provided,  but Lessor's expense for said  reconstruction
shall be repaid to Lessor  by Lessee in equal  installments  amortized  over the
remaining  term of this  Lease,  including  any  options  exercised  by  Lessee,
including  interest 2t a rate of two percent (27) over the best rate  obtainable
by Lessor for funds used to finance such reconstruction.

22.  CONDEMNATION.  The word "condemnation" or "condemned" as used in this Lease
shall  mean  the  exercise  of the  power of  eminent  domain  expressed  by the
condemnor  in any  writing as well as by the filing of any action or  proceeding
for such purpose by any entity having the right of power of eminent domain,  and
shall include a voluntary sale by Lessor to any such entity, either under threat
of   condemnation   or  while   condemnation   proceedings   are  pending,   and
"condemnation"  shall  occur  upon  the  actual  taking  of  possession  by  the
condemnor.  In the event the demised  premises or any part  thereof is condemned
and such condemnation  materially  interferes with Lessee's use of the premises,
this Lease  shall  terminate,  and Lessor and Lessee  shall be entitled to their
respective  interests  in the  amount of any award  made with  respect  thereto,
Lessee to receive  any  portions  of the award made as  compensation  for moving
expenses,   the  value  of  Lessee's  trade  fixtures,   equipment   alterations
improvements  and  personal  property  which  Lessee is entitled to remove,  and
Lessee's loss of business.  The appraisal of the court, or the condemning entity
if the  condemnation  is not  determined  by a court,  of the amount of any such
award  allocable to such items shall be conclusive.  If the total award be fixed
by  negotiation  and be greater  than the  condemning  entity's  appraisal,  the
portion  attributable  to such items shall be the same  proportion of the actual
award as said items were of the entity's  appraisal.  If such  condemnation does
not  materially  interfere  with Lessee's use of the premises,  this Lease shall
continue  except that rental  shall be reduced for the  remainder of the term of
this Lease,  as may be  extended'  in  proportion  to the amount of the premises
condemned,  using the square  footage of the  building as a base.  In such event
Lessor,  at Lessor's  expense,  shall  repair and remodel the  remainder  of the
premises so that the remaining  premises can be used  effectively by Lessee.  If
Lessor's  portion of the award is not  sufficient  to repair and  remodel,  then
Lessee shall reimburse Lessor for the cost of such repairs and remodeling to the
extent they exceed Lessor's  portion of the award in the same manner as provided
in the last sentence of Paragraph 21.

23.  WAIVER.  The  waiver  by Lessor 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 or any  subsequent  breach of the same or any other term,
covenant or condition  therein  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.

24.  NON-DISTURBANCE.  Notwithstanding  any subordination of this Lease,  Lessee
shall  have the  right to quiet  possession  and  shall  not be  disturbed  by a
successor in interest to Lessor,  provided  Lessee is not in default  under this
Lease and so long as Lessee shall pay rent and observe all other  provisions  of
this Lease. 25.  ARBITRATION.  In each case where there is a dispute between the
parties  under this Lease the  dispute  shall be  settled by  arbitration.  Such
arbitration   shall  be  determined  as  provided  in  this  paragraph  and  all
arbitrators shall be disinterested  persons of at least ten years' experience in
an executive  capacity in the active  management of major real properties in the
Northern  California Area. The party desiring such arbitration shall give notice
to that  effect to the  other  Party,  specifying  in said  notice  the name and
address of such person  designated to act as  arbitrator  on its behalf.  Within
twenty  (20) days after the service of such  notice,  the other party shall give
notice  to the  first  party  specifying  the name  and  address  of the  person
designated  to act as  arbitrator  on its behalf.  If the second  party fails to
notify the first  party of the  appointment  of its  arbitrator,  as  aforesaid,
within  or by the time  above  specified  then  the  appointment  of the  second
arbitrator  shall be made in the same  manner as  hereinafter  provided  for the
appointment of a third arbitrator in a case where the two arbitrators  appointed
hereunder  and the  parties  are  unable  to agree  upon such  appointment.  The
arbitrators  so  chosen  shall  meet  within  ten (10)  days  after  the  second
arbitrator is appointed.  If the said two  arbitrators  shall not agree upon the
decision to be made in such  dispute,  they shall,  themselves,  appoint a third
arbitrator  who shall be a competent and impartial  person;  and in the event of
their failure to make such decision to appoint such  arbitrator  within ten (10)
days after their meeting,  the third arbitrator shall be selected by the parties
themselves  if they can agree  thereon  within a further  period of fifteen (15)
days. If the parties do not so agree,  then either party, on behalf of both, may
request the then  presiding  judge of any Court having  jurisdiction  thereof to
appoint such third arbitrator,  and the other party shall not raise any question
as to the Court's full power and  jurisdiction  to entertain the application and
make the appointment and the person so appointed shall be the third  arbitrator.
The  decision of the  arbitrators  so chosen  shall be given  within a period of
thirty (30) days after the appointment of such third arbitrator. The decision in
which any two of the arbitrators so appointed and acting  hereunder concur shall
in all cases be binding and  conclusive  upon the parties.  Each party shall pay
the fees and  expenses of the one of the two original  arbitrators  appointed by
such party' or in whose stead as above  provided such  arbitrator was appointed,
and the  fees and  expenses  of the  third  arbitrator,  if any,  shall be borne
equally by both  parties.  Except as  otherwise  provided  in this  Lease,  said
arbitration  shall be conducted in accordance  with the rules then  obtaining of
the American Arbitration Association, and judgment upon any arbitration decision
rendered may be entered by any Court having jurisdiction thereof.

26. NOTICES. All notices to be given hereunder shall be in writing.

27. SUCCESSORS AND ASSIGNS. The covenants and agreements contained in this Lease
shall be  binding  upon the  parties  hereto and upon  their  respective  heirs,
executors, administrators, successors and assigns.

28.  REMEDIES  CUMULATIVE.  The remedies  available to Lessor under the terms of
this  agreement and in law or equity shall be cumulative and the exercise of one
remedy shall not constitute an election of remedies.

29. TIME. Time is of the essence of this Lease.

30. CAPTIONS.  The captions in this Lease are for convenience only and are not a
part  of this  Lease  and do not in any way  limit  or  amplify  the  terms  and
provisions of this Lease.

31. SPECIAL MAINTENANCE.  Lessee shall provide maintenance at least bimonthly to
all air conditioning  and heating  equipment and repair or replace any equipment
when  required,  including  the cost of  labor,  when not  covered  by  existing
warranties.  Lessee  to  supply  lessor  with a copy  of  maintenance  agreement
contract  with  a  licensed  air  conditioning  service  contractor  or  provide
preventative maintenance in accordance with accepted industry practice.

32. FLOOR TILE.  Lessee to replace  floor tile to Lessor's  satisfaction  in the
event tile is not in the same  condition at the expiration o. this Lease as when
first received,  exclusive of normal wear and tear,  damage by fire' earthquake,
acts of God or the  elements,  other  casualties  or  resulting  from defects in
construction, materials or design.

33. RENEWAL OPTIONS. Lessee shall have an option to renew this Lease for fifteen
(15)  consecutive  five (5) year  terms,  commencing  on the  expiration  of the
original term of this Lease, by giving notice to Lessor at least one hundred and
twenty (120) days prior to the expiration of the original,  or the then extended
term, of Lessee's  election to exercise this option to renew. The extended terms
shall be upon all the terms and conditions set forth herein,  including, but not
limited to, Paragraph 34 hereof.

34. RENTAL  INCREASES.  The monthly  rental for each five (5) year period during
which this Lease  remains in force and effect,  commencing  with the sixth (6th)
year of this lease,  shall increase by the amount equal to seven percent (7%) of
the monthly rental payable during the five (5) year period immediately preceding
each such period.

35. SHORT FORM. Lessee shall have the right to record a short form of this Lease
and Lessor agrees to assist Lessee in such recordation.

36. EXHIBITS.  Exhibits A, B and C attached hereto and to be attached hereto are
incorporated herein by reference thereto.

IN WITNESS  WHEREOF,  the parties  hereto have executed this Lease as of the day
and year first above written.

"Landlord"

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato
SUSAN R. SOBRATO

/s/ Carl E. Berg by John A. Sobrato his Attorney in Fact
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

"Tenant"

AMDAHL CORPORATION

By /s/ Don L. Beck
Its Facilities Manager





Mr. John A, Sobrato
Sobrato-Berg Properties III
20700 Valley Green Drive
Cupertino, California 95014

Re: Letter Agreement Modifying Lease

Dear John:

This Letter  Agreement shall serve as a modification  of the lease  (hereinafter
called "Lease") between JOHN A. SOBRATO and SUSAN R. SOBRATO,  a married couple,
CARL E,  BERG and MARY ANN  BERG,  a married  couple  (hereinafter  collectively
called "Lessor" and AMDAHL CORPORATION (hereinafter called "Lessee"), a Delaware
corporation,  which Lease is dated April 3, 1979 and amended per the Addendum to
Lease  dated June 7, 1979,  whereby  Lessor  leased to Lessee  certain  premises
(hereinafter  called "Premises")  situated in the City of Santa Clara, County of
Santa Clara,  State o!  California,  the Premises  being located on the property
described  in Exhibit A to the Lease.  Lessor  and  Lessee  hereby  agree to the
following modifications and understandings to and regarding the Lease.

1.  Lessor  shall be  responsible  for  construction  of the office  building as
provided  for in the Lease.  Lessee  shall have the right to approve the design,
materials,  subcontractors,  materialmen,  all  contracts  and all  expenses  of
construction prior to Lessor contracting for, performing or paying for same.

2. Except as provided in Paragraph 5 hereof,  notwithstanding  the rental amount
of($75,146.87)  Seventy  Five  Thousand  One Hundred  Forty Six and Eighty Seven
Cents.  per  month  to be  payable  by  Lessee  to  Lessor  as set  forth in the
WITNESSETH of the Lease, as amended by the Addendum to Lease.

3. Lessor,  at Lessor's sole expense,  shall be responsible for the Construction
Costs, as hereinafter defined, except as provided in Paragraph 5 hereof.

4. "Construction  Costs" shall mean all costs incurred and paid for by Lessor in
constructing  the  office  building,  including  but  not  limited  to,  fees to
independent   contractors  working  on  construction  of  the  office  building,
materials for the office  building,  title insurance  premiums,  architects' and
engineers' fees for development of plane for the office building,  and City fees
and permit  changes,  all  necessary  bonds and  insurance  policies,  costs for
interest on the construction during the course of construction, including points
for commitments  therefor,  the cost of the land underlying the Premises (at the
rate of Five Dollars ($5,00) per square foot), interest at the prime rate on the
cost of the land  underlying  the Premises (at the rate of Five Dollars  ($5.00)
per square foot) during  construction  only, costs of permits,  any construction
fees or area fees of the City of Santa  Clara,  any taxes on the land during the
construction  period,  any costs to extend utility service to the property,  and
the cost of soil tests,  on-site  supervision  costs, and a fee to Lessor of one
point nine  twenty-five  percent  (1.925%)  for  management  fees,  exclusive of
Lessor's one point nine twenty-five percent (1.9251%) management fee.

5.  Lessee,  at  Lessee's  sole  expense,  shall be  responsible  for all of the
Construction  Costs,  an defined in  Paragraph  4, in excess of Six Million Nine
Hundred Fifty Thousand Dollars ($6,950,000.)

6. Lessee shall have access to all of Lessor's  records and accounts  related to
construction of the office building and the Construction Costs at all times, and
Lessee shall have the right to audit such books and records at any time.  Lessor
shall deliver to Lessee, prior to execution, all contracts and plans, and Lessor
shall obtain Lessee's standard  warranties from all contractors,  subcontractors
and  materialmen.  Lessee shall have the right to make changes in the Plans,  as
defined  in the Lease,  at any time;  provided,  however,  in the event any such
Lessee changes in the Plans delay the scheduled  completion  date of the project
beyond December 1, 1978 and such delay in not attributable to any cause or event
other than Lessee's  changes in the Plans,  the  commencement  date of the Lease
with  regard to monthly  rent only shall  occur  earlier  than as defined in the
Lease  by the  number  of days  equal  to the  number  of days of  delay  in the
scheduled  completion  date of the  project  beyond  December  1, 1979 which are
solely attributable to Lessee's changes in the Plans.

7.  Lessor  agrees to use  Lessor's  best  efforts  to get the  lowest  possible
interest rate and the highest  principal  amount (up to Six Million Nine Hundred
Fifty Thousand Dollars  ($6,950,000.) on any permanent financing on the Premises
or any financing on the Premises  referred to herein or in the Lease;  provided,
however,  Lessee shall have the right to provide any such financing it Lessee is
able to  obtain  a  lower  interest  rate on any  such  financing  prior  to the
submittal of any loan  application by Lessor which has previously  been approved
by Lessee.

8.  Notwithstanding  anything  to  the  contrary  in  the  WITNESSETH,  Lessor's
obligation to repair  defects in the materials  and  construction  of the office
building and any other improvements constructed by Lessor pursuant to the Lease,
shall  include all patent and latent  defects in the office  building  and other
improvements  constructed  by Lessor  pursuant  to Lease,  but shall not include
repairs required due to ordinary wear and tear or repairs required due to damage
caused by Lessee.

9. Lessee hereby  authorizes  Lessor to apply for permanent  financing  from any
institutional lender approved by Lessee on the following terms:

      1. Amount - $6,100,00 to $6,950,000.00

      2. Amortization Term - Twenty-Nine (29) years.

      3. Lender Call Privilege - Twenty-Nine (29) years,

      4. Interest Rate - 9 3/4%

      5. Loan Fee - 0 - 3 1/2%

      6. Rent Coverage Over Monthly Debt Service Charge - 1. 25.

Lessor's loan  application in conformance  with the foregoing is hereby attached
hereto.

10.  Notwithstanding  anything to the  contrary  herein,  in the event Lessor is
unable to  obtain  interim  financing  in an  amount  sufficient  to pay for all
Construction Costs, Lessee shall be responsible for Construction Costs in excess
of Six Million Nine hundred Fifty Thousand Dollars ($6,950,000.00)  according to
the following;

      (a) Lessee  shall not be  required  to pay  Lessor any sum of money  until
      Lessor has expended all interim  financing funds and Lessee has received a
      verified  affidavit from Lessor's  interim  financing  lender (Union Bank)
      that all interim  financing  funds have been  exhausted  exclusive of such
      lender's reserve requirement;

      (b) Upon Lessee's  approval of invoice for such  Construction  Costs, such
      approval to occur within thirty (30) days after  Lessee's  receipt of such
      invoices,  Lessee  shall pay Lessor any amounts  due Lessor.  In the event
      Lessee does not pay Lessor  within  sixty (60) days,  Lessor may draw upon
      Letter of Credit as specified in paragraph 11 (c) below.

      (c) Lessee's obligations contained in Paragraph 11 (b) shall be secured by
      an irrevocable  conditional  letter of credit in the name of Lessor in the
      amount of Five Hundred Fifty Thousand Dollars (550,000.00) which letter of
      credit  shall  provide  that  Lessor may draw on the letter of credit upon
      delivery to the bank issuing the letter of credit of a verified  affidavit
      stating that Lessee has failed to perform  according to the  provisions of
      Paragraph  11 (B) and the  amount  due  Lessor  as well as the  invoice(s)
      reflecting the payments due Lessor;

      (d) Lessee may reduce the amount of the conditional  letter of credit from
      time to time as  payments  are made to Lessor  and in amount  equal to the
      payments made to Lessor (Lessor shall execute all documents required to so
      reduce the amount of the letter of credit).

11. In the event Lessee makes  changes to the building  that cause the permanent
lender to reduce the amount of the committed  permanent  financing amount of Six
Million Nine Hundred Fifty  Thousand  Dollars,  then Lessee shall be responsible
for the difference Pursuant to Paragraph 5 hereof.

IN WITNESS  HEREOF,  the parties  hereto have executed two (2) or more copies of
this Letter Agreement on October 19, 1979.

"Lessor"

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato by John A. Sobrato her Attorney in Fact
SUSAN R. SOBRATO

/s/ Carl E. Berg by John A. Sobrato his Attorney in Fact
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

"Lessee"

AMDAHL CORPORATION

By /s/ Don L. Beck
Its Facilities Manager





                              ADDENDUM # 2 TO LEASE
THIS  ADDENDUM TO LEASE,  executed in  duplicate  as of the 19th day of October,
1979,  between JOHN A. SOBRATO and SUSAN R. SOBRATO,  a married couple,  CARL E.
BERG and MARY ANN  BERG,  a married  couple,  (hereinafter  collectively  called
"Lessor"),  and AMDAHL CORPORATION,  a Delaware corporation  thereinafter called
"Lessee"),

                                   WITNESSETH

A.  Lessor  and Lessee  entered  into that  certain  lease  thereinafter  called
"Lease")  dated April 3, 1979,  whereby  Lessor leased unto Lessee those certain
premises  situated in the City of Santa Clara,  County of Santa Clara,  State of
California,  and described as follows,  to wit: that property  which is shown as
Parcel 1 on that certain Parcel Hap recorded April 13, 1079 in Book 438 of Maps,
at  Pages  17 and  18,  Official  Records  of  Santa  Clara  County  (comprising
approximately  7,365  acres)  together  with the  improvements  consisting  of a
two-story  office  building  which office  building  shall  contain at least one
hundred  twenty-eight  thousand  (128,000) gross square feet. The Lease has been
amended by that certain Addendum to Lease dated seventh day of June, 1979.

B. Lessor and Lessee desire to amend the Lease as hereinafter provided.

NOW,  THEREFORE,  IN  CONSIDERATION  of the mutual covenants and promises of the
parties, the parties hereto agree as follows:

1, Witnesseth,  Monthly Rectal. The rental of Seventy-Three Thousand Six Hundred
Ninety-Two  dollars  ($73,692,00)-per  month and as amended in the  Addendum  to
Lease dated  seventh of June,  1970,  payable on the first day of each  calendar
month  throughout the term of the Lease, is set forth on Page 5 of the Lease, is
hereby  changed and amended to be Seventy Five  Thousand  One Hundred  Forty-Six
Dollars and Eighty-Seven Cents ($75,146.87)

 2. Witnesseth. Term. The term of this Lease, twenty (20)
years as set forth on Page 4 of the Lease
 is hereby changed and amended to be  twenty-nine  (29) years and shall continue
to be subject to the renewal options as set forth in Paragraph 33 of the Lease.

 3. Lease.  Except as specifically  modified and amended by this Addendum # 2 to
Lease,  and the Addendum to Lease dated seventh of June,  1978,  the Lease shall
remain  in full  force and  effect  upon the  terms,  covenants  and  conditions
contained in the Lease.
 IN WITNESS WHEREOF,  the parties hereto have executed this Addendum to Lease in
one (1) or more copies on the day and year first above written.

"Lessor"

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato by John A. Sobrato her Attorney in Fact
SUSAN R. SOBRATO

/s/ Carl E. Berg by John A. Sobrato his Attorney in Fact
CARL E. BERG

/s/ Mary Ann Berg by John A. Sobrato her Attorney in Fact
MARY ANN BERG

"Lessee"

AMDAHL CORPORATION

By /s/ Don L. Beck
Its Facilities Manager





                             ADDENDUM NO. 3 TO LEASE

THIS ADDENDUM NO. 3 TO LEASE is entered as of the 6th day of December,  1979, by
and between JOHN A. SOBRATO and SUSAN R. SOBRATO, a married couple, CARL E. BERG
and MARY ANN BERG,  a married  couple,  CLYDE J. BERG and NANCY BERG,  a married
couple,  and ROBERT M. GRANUM, II and KAY GRANUM, a married couple  (hereinafter
collectively  called "Lessor") and AMDAHL  CORPORATION,  a Delaware  corporation
(hereinafter called "Lessee").

                               W I T N E S S E T H

The parties  enter this  Addendum  No. 3 to Lease on the basis of the  following
facts, intentions and understandings:

A.  Lessor  and Lessee  entered  into that  certain  lease  (hereinafter  called
"Lease")  dated April 3, 1979 whereby  Lessor  leased unto Lessee those  certain
premises  situated in the City of Santa Clara,  County of Santa Clara,  State of
California,  and described as follows,  to-wit:  the property  which is shown as
Parcel 1 on that certain Parcel Map recorded April 13, 1979 in Book 439 of Maps,
at  Pages  17 and  18,  Official  Records  of  Santa  Clara  County  (comprising
approximately  7.365  acres)  together  with the  improvements  consisting  of a
two-story  office  building,  which office  building  shall contain at least one
hundred twenty-eight thousand (128,000) gross square feet.

B. Lessor and Lessee have  amended the Lease per Addendum to Lease dated June 7,
1979 and per  Addendum  No. 2 to  Lease  dated  October  19,  1979  (hereinafter
collectively called "Prior Addenda").

C.  Lessor and Lessee have  modified  the Lease per Letter  Agreement  Modifying
Lease (hereinafter called "Letter Agreement") dated August 27, 1979.

D. Lessor and Lessee now desire to amend the Lease as hereinafter provided.

NOW,  THEREFORE,  IN  CONSIDERATION  of the mutual covenants and promises of the
parties, the parties hereto agree as follows:

1.  Prior  Addenda  and  Letter  Agreement.  The Prior  Addenda  and the  Letter
Agreement are hereby cancelled and nullified.

2. Witnesseth. Monthly Rental. The rental of Sixty Thousand Dollars ($60,000.00)
per month payable on the first day of each calendar month throughout the term of
the Lease, as set forth on Page 5 of the Lease, is hereby changed and amended to
be Seventy-Five  Thousand One Hundred Forty-Six  Dollars and Eighty-Seven  Cents
($75,146.87) per month.

3.  Witnesseth.  Term. The term of the Lease as set forth on Page 4 of the Lease
is hereby changed and amended to be twenty-nine (29) years and shall continue to
be subject to the renewal options set forth in Paragraph 33 of the Lease.

4.  Witnesseth.  Lessee  hereby  approves all  contractors,  subcontractors  and
materialmen  involved  in  construction  of the office  building  as well as the
design,  materials and workmanship of the construction.  Lessee further approves
all expenses incurred to date relating to construction of the improvements.

5. Witnesseth.  Acceptance.  Lessee and Lessor hereby confirm and agree that the
office building was Fully Complete and Ready for Occupancy, as defined on Page 2
of the Lease,  on December 1, 1979 and on said date Lessee  accepted  the office
building for occupancy.

6.  Witnesseth.  Repairs.  Notwithstanding  anything  to  the  contrary  in  the
WITNESSETH.   Lessor's  obligation  to  repair  defects  in  the  materials  and
construction  of the office building and any other  improvements  constructed by
Lessor shall  include all patent and latent  defects in the office  building and
other  improvements) but shall not include repairs required due to ordinary wear
and tear or repairs required due to damage caused by Lessee.

7. Paragraph 7. Assignment and Subletting.  Wherever in Paragraph 7 of the Lease
the consent of Lessor is required to an  assignment  of the Lease,  The Board of
Trustees of the National  Electrical  Contractors  Association  Pension  Benefit
Trust Fund shall also have the right of approval of any such assignment, as long
as such approval is not  unreasonably  withheld,  such approval to be based upon
the financial  condition and management  capabilities of the proposed  assignee.
Lessee  shall  continue  to  remain  liable  under  the  Lease in the event of a
sublease,  unless Lessor exercises Lessor's right of first refusal to enter into
a direct  Lessor/Lessee  relationship  with any such party.  8.  Cancellation or
Surrender.  Lessor and Lessee shall not mutually  agree to the  cancellation  or
surrender of the Lease without  obtaining the prior written consent of The Board
of Trustees of the National Electrical  Contractors  Association Pension Benefit
Trust Fund as long as such approval is not unreasonably withheld.

9. Lease. Except as specifically  modified and amended by this Addendum No. 3 to
Lease, the Lease shall remain in full force and effect upon the terms, covenants
and conditions contained in the Lease.

IN WITNESS WHEREOF, the parties hereto have executed this Addendum No 3 to Lease
in one (1) or more copies on the day and year first above written.

"Lessor"
JOHN A. SOBRATO and
SUSAN R. SOBRATO, CARL
E. BERG and MARY ANN BERG,
CLYDE J. BERG and NANCY
BERG, ROBERT M. GRANUM, II
and KAY GRANUM

/s/ John A. Sobrato
JOHN A. SOBRATO

/s/ Susan R. Sobrato
SUSAN R. SOBRATO

/s/ Carl E. Berg
CARL E. BERG

/s/ Mary Ann Berg
MARY ANN BERG

/s/ Clyde J. Berg
CLYDE J. BERG

/s/ Nancy Berg
NANCY BERG

/s/ Robert M. Granum II
ROBERT M. GRANUM, II

/s/ Kay Granum
KAY GRANUM

"Lessee"

AMDAHL CORPORATION

By /s/ Don L. Beck
Its Facilities Manager

APPROVED AND AGREED TO:
The Board of Trustees of the
National Electrical Contractors
Association - Pension Benefit
Trust Fund

By
Its





                                      LEASE
THIS LEASE, executed in duplicate as of the 21st day of November,  1983, between
CARL E. BERG and MARY ANN BERG, Trustees of the Berg Living Trust UTA, dated May
1, 1981, as to an undivided 81.01% interest, CLYDE BERG and NANCY BERG, Trustees
of the Clyde Berg Living Trust UTA,  dated December 17, 1981, as to an undivided
11.83% interest,  and CLYDE BERG,  Trustee of Carl Berg Child's Trust UTA, dated
June 2, 1978, as to an undivided 7.16% interest, hereinafter collectively called
"Lessor",  and AMDAHL CORPORATION,  a Delaware  corporation,  hereinafter called
"Lessee".

WITNESSETH:  that Lessor  does  hereby  lease unto Lessee and Lessee does hereby
hire and take  from  Lessor  those  certain  Premises  (hereinafter  called  the
"Premises") situated in the City of Santa Clara, County of Santa Clara, State of
California, and described as follows:

      Parcel 2 as shown on that certain  Parcel Map  recorded  April 13, 1979 in
      Book 439 of Maps,  at Pages 17 and 18,  Official  Records  of Santa  Clara
      County.

together with the improvements ("Improvements") consisting of an office building
which shall contain approximately 65,000 to 85,000 gross square feet. The office
building  shall  be  constructed  on  the  Premises  by an  independent  general
contractor to be employed by and under the supervision of Lessor,  as developer,
in  accordance  with the plans and  specifications  ("Plans")  to be prepared by
Lessor and approved by Lessee. Such Plans will be attached hereto as Exhibit "A"
at such time as Lessee  approves the same and made a part  hereof.  Lessee shall
have the right to approve all  contractors,  subcontractors  and  materialmen as
well as the design, materials and workmanship of the construction.  Lessee shall
also have the right to approve all  expenses  relating to  construction  of said
Improvements before Lessor has contracted for same.

This Lease  shall not  become  effective  and the lease term shall not  commence
unless and until the office building,  consisting of at approximately  65,000 to
85,000  enclosed,  gross square feet, is Fully Complete and Ready for Occupancy,
as defined  herein.  Lessor shall cause the office building to be Fully Complete
and Ready for  Occupancy  no later  than May 1,  1984;  however,  if the  office
building is not Fully  Complete and Ready for Occupancy by such date,  the lease
term shall not commence and Lessor shall not be liable for any damages by reason
of such delay.  Provided,  however,  that if such  office  building is not Fully
Complete and Ready for Occupancy by October 1, 1984 (extended by the length of a
delay directly caused by strikes, acts of God, change orders requested by Lessee
or by any other cause which is both beyond the reasonable  control of Lessor and
not now reasonably foreseeable by Lessor), Lessee, at its option, shall have the
right to terminate this Lease and Lessor shall refund to Lessee any and all sums
which may have been paid by Lessee to Lessor  prior to such time.  Lessee  shall
also have the right to  terminate  this Lease and receive any and all sums which
may have been paid by Lessee to Lessor prior to such time if the  landscaping on
the  Premises  or any  remaining  work on the office  building  exterior  is not
completed in accordance with all of the applicable  Plans within sixty (60) days
after such building is Fully Complete and Ready for Occupancy.  "Fully  Complete
and  Ready  for  Occupancy"  shall  mean  that  (i) all  necessary  governmental
approvals,  permits,  consents  and  certificates  have been  obtained by or for
Lessor for the lawful  construction by Lessor,  and occupancy by Lessee, of said
Premises and Improvements, excluding work attributable to trade fixtures and any
special fit-up  requested by Lessee,  but including the certificate of occupancy
for said Premises and  Improvements  unless Lessee has occupied the Premises and
Improvements  prior to  Lessor's  receipt of such  certificate,  (ii) all of the
building interiors  substantially meet all of the applicable Plans, (iii) all of
the building exterior  substantially meets the applicable Plans, including paved
parking  areas,  and (iv) said building  interior is in "broom  clean"  finished
condition. Notwithstanding anything to the contrary herein, Lessor warrants that
there  shall be no  defects  in the  materials  or  construction  of the  office
building and any other  improvements  constructed by Lessor as provided  herein,
and Lessor shall repair any such defects in the materials or construction of the
office  building and any other  improvements  constructed  by Lessor as provided
herein if any such  defects  are  discovered  within  seven (7) years  after the
commencement of the term of this Lease. Lessor shall also be responsible for the
enforcement of any customary or expressed  warranties  from any  subcontractors,
material or equipment supplier, architect and engineer.

The term shall be for twenty  (20)  years,  subject to the  renewal  options set
forth in Paragraph 33 hereof. Unless Lessee has theretofore elected to terminate
this Lease,  as provided  hereinabove,  the term shall  commence when the office
building is Fully  Complete and Ready for  Occupancy  and (i) Lessee has entered
into  occupancy  of  the  office  building  or  (ii)  Lessor  has  received  the
certificate of occupancy for the office  building,  whichever shall occur first.
Lessee  shall pay Lessor rent  throughout  the term in an amount  determined  in
accordance with Exhibit "B" attached  hereto.  Rental shall be payable in lawful
money of the United  States of  America,  which  Lessee  agrees to pay to Lessor
without  deduction,   setoff  or  demand  at  10050  Bandley  Drive,  Cupertino,
California  95014,  or such place or places as may be designated in writing from
time to time by Lessor,  in advance.  The rental shall be payable on the 1st day
of each calendar month throughout the term of this Lease.

It is  further  mutually  agreed  between  the  parties as  follows:  1. USE AND
POSSESSION.  The Premises  and  Improvements  are to be used for  administrative
offices,  engineering,   research,  development,   warehousing,   receiving  and
inspecting,   manufacturing,   shipping,   employees'  cafeteria,   assembly  of
computer-oriented  electronic equipment and any other legal uses. If Lessee with
Lessor's consent takes possession prior to the commencement of said term, Lessee
shall do so subject to all the  covenants  and  conditions  hereof and shall pay
rent for the period  ending with the  commencement  of the said term at the same
monthly rate as that prescribed for the first month of the said term, subject to
proration for any partial month.  Any such early taking of possession  shall not
be deemed a formal acceptance of the Premises and/or Improvements as being Fully
Complete  and  Ready  for  Occupancy  and shall not be deemed a waiver of any of
Lessee's rights hereunder.

2. HOLDING OVER. If Lessee holds  possession  hereunder  after the expiration of
the term of this Lease with consent of Lessor, Lessee shall become a tenant from
month-to-month upon all of the terms and conditions herein specified.

3. ENTRY BY LESSOR.  Following  reasonable  notice,  and when  accompanied by an
employee of Lessee, Lessor and the agents and employees of Lessor shall have the
right to enter upon said Premises at all  reasonable  times to inspect the same,
to see that no damage has been or is done and to  protect  any and all rights of
Lessor and to post such  reasonable  notices as Lessor may desire to protect the
rights of the Lessor.  Lessor may for a period commencing ninety (90) days prior
to the end of the lease term, or any extension  thereof,  have reasonable access
to the Premises for the purpose of exhibiting  the same to  prospective  tenants
and may place upon said  Premises any usual or ordinary "for sale" or "to lease"
signs.

4.  CONDITION  AND REPAIRS.  Subject to the  WITNESSETH  hereinbefore  provided,
Lessee  shall at Lessee's  sole cost and expense  maintain,  repair and keep the
interior and exterior of the  Premises,  including  the roof and all  structural
components,  and each and  every  part  thereof  and all  appurtenances  thereto
(including,  without limitation,  sidewalks fronting thereon,  wiring, plumbing,
sewage system' heating and air cooling installations,  glazing and skylights, in
or bordering the Premises), in good condition and repair during the term of this
Lease;  damage thereto by wear and tear,  fire,  earthquake,  acts of God or the
elements,  other  casualties and defects in design,  materials and  construction
excepted.  In the event  Lessee  should  fail to start the  repairs  required of
Lessee  forthwith  upon thirty (30) days' written notice by Lessor,  Lessor,  in
addition  to all other  remedies  available  hereunder  or by law,  and  without
waiving any alternative  remedies,  may make the same and Lessee agrees to repay
Lessor as additional  rent the cost thereof as part of the rental payable on the
next day upon which rent becomes due.  Lessee agrees upon the  expiration of the
term of this Lease or sooner  termination  to surrender the Premises in the same
condition as received;  ordinary wear and tear, fire, earthquake, acts of God or
the elements, other casualties and defects in design, materials and construction
excepted.  In the event that any alterations,  repairs or acts of any kind shall
be required to be done by reason of Lessee's  occupancy in  connection  with the
Premises or any part thereof under the provisions of any law,  ordinance or rule
now in force or hereafter enacted by municipal, state or national authority, the
same shall be made at the cost and expense of Lessee.  Lessee shall maintain the
landscaping. All vinyl wall surfaces are to be maintained in as good a condition
as when Lessee took possession,  free of holes,  gouges, or defacements.  Lessee
shall limit  attachments to vinyl wall surfaces  exclusively to V-joints with no
larger than #6 screws.  All repairs,  alterations and  improvements  that may be
required under this Paragraph 4 shall be done at the cost and expense of Lessee.
Lessee will at all times permit any proper notices,  including proper notices of
nonresponsibility,  to be posted and to remain posted until the  completion  and
acceptance of such work.

5. WASTE AND  ALTERATIONS.  Lessee shall not commit,  or permit to be committed,
any waste upon the said Premises.  Lessee shall obtain Lessor's written consent,
which consent shall not be unreasonably  withheld,  for any alteration or repair
costing more than Five Thousand Dollars ($5,000.00),  and no work shall commence
until two (2) days after Lessee receives Lessor's written consent. Lessor hereby
consents to the installation and removal, upon termination, of computer flooring
paid for by Lessee.

Upon termination of this Lease,  Lessee may remove its property and Lessee shall
restore the Premises to original  condition at Lessee's  expense;  ordinary wear
and tear, fire,  earthquake,  acts of God or the elements,  other casualties and
defects in design,  materials  and  construction  excepted.  Except as otherwise
provided  herein,  any  property  that is installed by Lessee after Lessee takes
possession which has become an integral part of the building shall, if agreed by
Lessor and Lessee,  become  Lessor's  property.  In the event of any  subsequent
additions  or  alterations,  Lessee  agrees to restore to original  condition as
existed when Lessee first occupied upon written request of Lessor; ordinary wear
and tear, fire,  earthquake,  acts of God or the elements,  other casualties and
defects in design,  materials and construction  excepted.  Lessee shall have the
right to remove trade fixtures, equipment and personal property at any time.

6.  ABANDONMENT.  Lessee  shall not vacate or 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,
subject to applicable  provisions  of law, at the option of Lessor,  except such
property as may be mortgaged by Lessee.

7.  ASSIGNMENT  AND  SUBLETTING.  Lessee may assign or sublet all or part of the
Premises  without  Lessor's  consent to a parent,  subsidiary or affiliate or in
connection  with a merger,  consolidation  or sale of  substantially  all of its
assets.

With respect to any other sublease or  assignment,  Lessee shall not assign this
Lease,  or any interest  therein,  and shall not sublet the said Premises or any
part thereof, or any right or privilege appurtenant thereto, or suffer any other
person to occupy or use the said Premises,  or any portion thereof,  without the
written  consent of Lessor first had and  obtained,  which  consent shall not be
unreasonably withheld, and a consent to one assignment,  subletting,  occupation
or use by any other person shall not be deemed to be a consent to any subsequent
assignment, subletting, occupation or use by another person. Any such assignment
or subletting  without such consent shall be void,  and shall,  at the option of
the Lessor, terminate this Lease, providing Lessor has not unreasonably withheld
such  consent.  With  respect  to any other  sublease  or  assignment  except as
provided in the first  paragraph of this  Paragraph 7 of this Lease,  this Lease
shall not, nor shall any interest therein, be assignable,  as to the interest of
Lessee, by operation of law, without the written consent of Lessor,  which shall
not be unreasonably  withheld.  With respect to any other sublease or assignment
except as provided in the first  paragraph of this Paragraph 7 of this Lease, if
Lessee  desires to assign its rights under this Lease or to sublet all or a part
of the  Premises,  Lessee  shall first notify  Lessor of the proposed  terms and
conditions of such assignment or subletting;  and Lessor shall have the right of
first refusal to enter into a direct lessor-lessee  relationship with such party
under  such  proposed  terms and  conditions,  in which  event  Lessee  shall be
relieved  of its  obligations  hereunder  to  the  extent  of the  lessor-lessee
relationship  entered into between  Lessor and such third party;  provided  that
Lessor shall not have the above right of first refusal if the term of a proposed
assignment or sublease including option to extend is for a term not in excess of
five (5) years.

8. INDEMNIFICATION OF LESSOR.  Lessee shall, during the term of this Lease, save
harmless  Lessor  from any and all  loss,  damage,  claims of  damage,  demands,
obligations,  cause or causes of action,  or  liabilities  of any kind or nature
(including  reasonable costs or attorneys' fees if Lessor is made a party to any
action to which Lessee's indemnity runs hereunder), by reason of injury or death
of any person or persons or damage to any property of any kind and to whomsoever
belonging,  occurring  on the Premises if caused by Lessee,  Lessee's  officers,
directors,  employees,  agents,  subtenants and assignees,  concessionaires  and
licensees,  except that Lessor  shall be liable to Lessee for damages  resulting
from the acts,  willful  omissions or negligence of Lessor,  Lessor's  officers,
directors,  employees  and agents.  Lessor shall hold Lessee  harmless  from all
damages  arising  out of any  such  damage.  A  party's  obligation  under  this
Paragraph 8 to hold the other party  harmless shall be limited to any excess sum
over  insurance  proceeds,  if any,  received  by the party  being  indemnified,
including,  without  limitation,  all attorneys' fees and other litigation costs
and indemnified expenses incurred by the person.

9.  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,  or (c) any action taken or
suffered by Lessee under any  insolvency  or bankruptcy  act shall  constitute a
breach of this Lease by Lessee. Upon the happening of any such event, subject to
the applicable grace periods set forth in Paragraph 10 hereof,  this Lease shall
terminate  ten (10) days after  written  notice of  termination  from  Lessor to
Lessee.

10.  DEFAULT.  Any of the  following  events shall  constitute a default of this
Lease:

      (a) Failure to pay rent or any other sums due to Lessor upon the date when
      said payment is due, said failure continuing for a period of ten (10) days
      after written notice of default;

      (b) Abandonment or vacation by Lessee of all of the
      Premises;

      (c) A general assignment by Lessee for the benefit of creditors;

      (d) The filing of a  voluntary  petition  in  bankruptcy  by Lessee or the
      filing of an  involuntary  petition by Lessee's  creditors,  said petition
      remaining undischarged for a period of thirty (30) days;

      (e) The appointment of a receiver to take possession of substantially  all
      of Lessee's assets or of the leased Premises,  said receivership remaining
      undissolved for a period of thirty (30) days;

      (f) Attachment,  execution or other judicial seizure of substantially  all
      of Lessee's assets or the Premises,  such  attachment,  execution or other
      seizure remaining  undismissed or undischarged for a period of thirty (30)
      days after the levy thereof; (g) Failure to commence repairs,  required to
      be made by Lessee hereunder,  within thirty (30) days after written notice
      thereof  from  Lessor to Lessee;  (h)  Failure to perform  any of Lessee's
      covenants  hereunder,  except those listed in items (a) through (g) above,
      said failure  continuing for thirty (30) days after written notice thereof
      from Lessor to Lessee,  unless Lessee has in good faith  commenced  curing
      said failure.

In the event of a default,  and in  addition  to all other  rights and  remedies
Lessor  may have at law,  Lessor  shall  have the option to do any or all of the
following:

      A. RE-ENTRY. Immediately re-enter and remove all persons and property from
      the  Premises,  storing said  personal  property in a public  warehouse or
      elsewhere at the cost of and for the account of Lessee. No such reentry or
      taking of  possession  of the  Premises by Lessor shall be construed as an
      election on its part to terminate  this Lease,  unless a written notice of
      such intention is given by the Lessor to Lessee or unless the  termination
      thereof  be  decreed  by a court of  competent  jurisdiction.  B.  WITHOUT
      TERMINATION  OF THE LEASE  PURSUE  THE REMEDY  PROVIDED  BY THIS LEASE AND
      CIVIL CODE SECTION 1951.4.  Without  termination of the Lease,  collect by
      suit or otherwise each  installment of rent or other sum as it becomes due
      hereunder,  or enforce by suit or  otherwise,  any other term or provision
      hereof on the part of Lessee  required to be kept or  performed,  it being
      specifically  agreed  that all unpaid  installments  of rent or other sums
      shall bear  interest at the highest  legal rate from the due date  thereof
      until paid.

      Without terminating the Lease, Lessor shall relet the Premises or any part
      thereof for such term or terms (which may be for a term  extending  beyond
      the term of this  Lease) and at such rental or rentals and upon such other
      terms  and  conditions  as Lessor in its  reasonable  discretion  may deem
      advisable with the right to make  alterations and repairs to said Premises
      necessary for reletting.  Upon such  reletting,  (i) Lessee is immediately
      liable to pay to Lessor,  in addition to any indebtedness  other than rent
      due  hereunder,  the  cost  and  expense  of  such  reletting,   including
      reasonable  expenses  to  prepare  the  Premises  for such  reletting  and
      reasonable attorneys' fees and real estate commissions, and the amount, if
      any,  by which the rent  reserved  in this  Lease  for the  period of such
      reletting (up to but not beyond the term of the Lease)  exceeds the amount
      agreed to be paid as rent by any new Lessee for the demised  Premises  for
      such  period on such  reletting,  or (ii) at the  option of  Lessor,  rent
      received by Lessor for such reletting shall be applied first to payment of
      any  indebtedness,  other than rent due  hereunder  from Lessee to Lessor;
      second, to payment of any costs and expenses of such reletting;  third, to
      payment of rent due and unpaid hereunder;  and, the residue, if any, shall
      be held by Lessor and  applied in payment of future rent as may become due
      and payable  hereunder.  If Lessee has been  credited  with any rent to be
      received  for  reletting  under  option  (i),  and such rent  shall not be
      promptly  paid to Lessor by the new Lessee,  or if such  rentals  received
      from such  reletting  under option (ii) during any month be less than paid
      during  that  month  by  Lessee  hereunder,  Lessee  shall  pay  any  such
      deficiency  to  Lessor.  Such  deficiency  shall  be  calculated  and paid
      monthly.

      PROVIDED, HOWEVER, that if the Lessor does not relet said Premises itself,
      then  Lessee  may  sublet or assign its  interest  in the Lease,  or both,
      pursuant to Paragraph 7 hereunder.  Any reasonable  expenses  incurred for
      renovation and alteration of the Premises in order to put said Premises in
      condition  for  occupancy  by the assignee or sublessee of Lessee shall be
      borne by Lessee.

      C.  TERMINATION OF THE LEASE PURSUANT TO SECTION 1951.2 OF THE CIVIL CODE.
      Notwithstanding any such reletting without termination,  Lessor may at any
      time  thereafter  elect to  terminate  this  Lease  for any such  previous
      breach.  Should Lessor at any time terminate this Lease for any breach, in
      addition to any other remedy he may have,  he may recover from Lessee,  at
      the time of award, any and all of the following damages:

           (i) All  unpaid  rent up to the time of  termination,  plus  interest
           thereon at the legal rate.

           (ii)  Between  the date of  termination  and the date of  award,  the
           difference between the unpaid rent and the amount of such rental loss
           that the Lessee proves  Lessor could  reasonably  have avoided,  plus
           interest thereon at the legal rate.

           (iii) The present value of the difference between the unpaid rent for
           the balance of the term after the award and the amount of such rental
           loss the  Lessee  proves the Lessor  could have  reasonably  avoided'
           computed by discounting such amount at the discount  interest rate of
           the Federal  Reserve  Bank of San  Francisco at the time of the award
           plus one percent (1%) .

All of these amounts shall be immediately  due and payable at the date of award,
from the Lessee to Lessor.  In addition to the amount  recovered for damages for
loss of past and future  rents,  Lessor shall be entitled to recover  reasonable
expenses in retaking the  property,  in making  repairs  Lessee was obligated to
make,  in preparing the property for  reletting,  and in reletting the property,
and other such damages as necessary to  compensate  Lessor for all the detriment
caused by Lessee,  including, but not limited to, breaches of specific covenants
of the Lease such as the  promise to  maintain  and the  promise to restore  the
Premises on termination.

11.  SURRENDER  OF LEASE.  The  voluntary  or other  surrender  of this Lease by
Lessee, or a mutual cancellation thereof, shall not work a merger, and shall not
terminate all or any existing subleases or subtenancies, but shall operate as an
assignment to Lessor of any or all such subleases or subtenancies.

l2. LITIGATION EXPENSES. If either party shall bring an action against the other
by reason of the  breach of any  covenant,  warranty  or  condition  hereof,  or
otherwise  arising out of this Lease,  whether for  declaratory or other relief,
the  prevailing  party in such suit shall be  entitled  to its costs of suit and
reasonable attorneys' fees, which shall be payable whether or not such action is
prosecuted to judgment.  Prevailing  party within the meaning of this  paragraph
shall  include,  without  limitation,  a party who brings an action  against the
other after the other's  default,  if such action is dismissed  upon the other's
payment of the sums  allegedly due or  performance  of the  covenants  allegedly
breached,  or if the plaintiff or cross- complainant  obtains  substantially the
relief sought by it in the action.

13. UTILITIES. Lessee shall pay for all the water, sewage, fuel, gas, oil, heat,
electricity,  telephone janitorial and landscape  maintenance during the term of
this Lease.

14. LIENS. Lessee shall keep the Premises and building of which the Premises are
a part  free and clear of any liens  and  encumbrances  arising  out of any work
performed  or  materials  furnished  by or at the  direction  of Lessee  and all
indemnify,  hold  harmless  and defend  Lessor  from any liens and  encumbrances
arising out of any work performed or materials  furnished by or at the direction
of Lessee;  provided,  however that such covenant shall not include construction
done by Lessor.  In the event any such lien is filed,  Lessee  shall do all acts
necessary to discharge any lien within thirty (30) days of filing,  or if Lessee
desires to contest any such lien,  then Lessee shall deposit with Lessor one and
one-half  (1 1/2) times the amount of said lien as  security  for the payment of
said lien claim or provide adequate bonding for such lien.

15.  TAXATION.  In addition to all other payments  herein provided to be made by
Lessee and as additional  rental  hereunder,  Lessee agrees to pay to the County
tax  collector  prior  to  delinquency,  all real  property  taxes  and  special
assessments which have become or may become a lien upon the demised Premises (or
are  otherwise  imposed or  assessed  on the  demised  Premises)  or any portion
thereof or upon  improvements  thereon or improvements  added thereto during the
term of this Lease,  provided that any said taxes and assessments  shall be paid
over the  maximum  period  permitted  by law and Lessee  shall be liable on only
those  payments  due during the term  hereof.  If Lessee fails to pay such taxes
and/or assessments,  in addition to all other remedies Lessor has herein, Lessor
shall have the right to pay any or all of such taxes and/or  assessments  and to
recover  reimbursement  therefor from Lessee. Taxes and assessments for the year
in which this Lease  commences and for the year in which it terminates  shall be
equitably  prorated.  Lessee shall have the right to contest any  assessment  or
tax, and in the event that Lessee decides to attempt such contest,  Lessor shall
provide  documents  that are  reasonably  necessary  to that end. If at any time
during  the term of this  Lease a tax or excise on rents or other  tax,  however
described,  is levied or assessed against Lessor, as a substitute in whole or in
part for real property taxes  assessed or imposed on Premises,  Lessee shall pay
before  delinquency  such tax or excise on rents or such other tax to the extent
that such tax or excise  on rents or other  tax is a  substitute  in whole or in
part for  real  property  taxes on the  Premises.  Upon the  passage  of any law
deducting  from the value of real property for the purposes of taxation any lien
thereon,  or changing in any way the taxation of deeds of trust or debts secured
thereby for state or local purposes,  or the manner of collecting such taxes and
imposing a tax,  either  directly or indirectly,  on that certain Deed of Trust,
Security Agreement, Fixture Filing and Assignment of Rents ("Deed of Trust") and
Promissory  Note Secured by Deed of Trust  ("Note") on the Premises  executed of
even date herewith by and between Lessor,  as borrower and trustor,  and Lessee,
as lender and  beneficiary,  evidencing and securing an  indebtedness of no more
than $9,000,000.00,  Lessee shall pay such tax before delinquency.  In the event
that a tax or  excise  on rents is  levied  or  assessed  against  Lessor,  as a
substitute in whole or in part for taxes assessed or imposed on the Premises, or
a tax on the Note or Deed of Trust is levied or assessed against Lessor, and the
taxing  authority  takes the position that Lessee cannot pay and discharge  such
tax on behalf of the Lessor, then at the election of Lessor, Lessor may increase
the  rent  charged  hereunder  by the  exact  portion  of such  tax  which  is a
substitute in whole or in part for real property  taxes on the Premises or a tax
on the  Note or Deed  of  Trust,  and  Lessee  agrees  to pay  said  portion  as
additional  rent at the time rental payments are due. Lessee shall be liable for
all taxes levied against personal property, inventory and trade fixtures.

16. USES PROHIBITED.  Lessee shall not use, or permit said Premises, or any part
thereof,  to be used for any  purpose  or  purposes  other  than the  purpose or
purposes for which the said Premises are hereby leased; and no use shall be made
or permitted to be made of the said Premises,  nor acts done, which will 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
said Premises,  any article which may be prohibited by said insurance  policies.
Lessee  shall,  at  Lessee's  sole  cost and  expense,  comply  with any and all
requirements,  pertaining to said  Premises,  of any insurance  organization  or
company,  necessary for the  maintenance of the  hereinafter  mentioned fire and
public liability insurance covering said building and appurtenances.

17. INSURANCE. Lessee shall maintain during the term of this Lease comprehensive
public  liability,  plate glass and property damage insurance to protect against
any liability to the public,  or to any employee,  agent or invitee of Lessee or
Lessor,  incident to the use of or resulting  from any accident  occurring in or
about the  Premises,  with  limits  of  liability  of not less than One  Million
Dollars   ($1,000,000.00)   for  injury  to  one  person,  Two  Million  Dollars
($2,000,000.00)  for injury to two or more  persons,  and Five Hundred  Thousand
Dollars  ($500,000.00) for property damage.  All policies of insurance  provided
for herein shall:

      (a) Be written by  companies  authorized  to do  business  in the State of
      California,  and rated "AAA" or better in Best's Insurance Reports,  or as
      specifically otherwise accepted by Lessor by written consent.

      (b) Be written as primary policies of insurance and not contributing  with
      or in excess of any coverage which Lessor may carry, and cover, insure and
      name Lessor as an additional assured.

      (c) Contain an endorsement  requiring  thirty (30) days' written notice to
      Lessor prior to cancellation or any change in coverage.

During the term of this Lease,  Lessee, at its expense,  shall maintain in force
insurance  against loss or damage by fire to the  improvements  located upon the
leased Premises in the initial amount of Eight Million  Dollars  ($8,000,000.00)
with extended and vandalism  coverage and special  extended perils ("all risk"),
which amount may be  increased  in future  years based upon bona fide  appraised
increases in  replacement  cost.  However,  Lessee need not  purchase  insurance
covering damage due to earthquake.

Such  insurance  shall be  procured  from a  responsible  insurance  company  or
companies  authorized to do business in California,  and the policies evidencing
such  insurance may be endorsed with a mortgagee's  loss payable  endorsement in
standard  form  and  shall  be  delivered  to  Lessor  (and  kept by  Lessor  or
encumbrancer),  and renewals  thereof  shall be delivered by Lessee to Lessor at
least thirty (30) days prior to their  respective  expiration dates and shall be
kept by Lessor or any encumbrancer.  Lessor shall be named as additional insured
on said  policies  which shall  provide  that Lessor be given  thirty (30) days'
notice of any nonpayment of premium or cancellation. Each party shall cause each
insurance policy obtained by it to provide that the insurance company waives all
right of recovery by way of subrogation  against either party in connection with
any damage  covered by any policy.  If any  insurance  policy cannot be obtained
with a  waiver  of  subrogation,  or is  obtainable  only by the  payment  of an
additional  premium  charge above that charged by  insurance  companies  issuing
policies  without  waiver of  subrogation,  the party  undertaking to obtain the
insurance  shall notify the other party of this fact. The other party shall have
a period  of ten (10)  days  after  receiving  the  notice  either  to place the
insurance with a company that is reasonably satisfactory to the other party that
will carry the insurance  with a waiver of  subrogation,  or to agree to pay the
additional  premium if such a policy is obtainable  at  additional  cost. If the
insurance cannot be obtained or the party in whose favor a waiver of subrogation
is desired  refuses to pay the additional  premium  charged,  the other party is
relieved of the obligation to obtain a waiver of subrogation rights with respect
to the particular insurance involved.

18. COMPLIANCE WITH GOVERNMENTAL REGULATIONS. Lessee shall, at his sole cost and
expense, comply with all of the requirements of all Municipal, State and Federal
authorities now in force pertaining to Lessee's occupancy of the Premises.

19. EFFECTS OF CONVEYANCE. If Lessor is not in default of any of its obligations
hereunder,  the term "Lessor" as used in this Lease means only the owner for the
time being of the land and buildings  containing  the Premises,  so that, in the
event of any sale of said land and buildings, or in the event of a lease of said
buildings,  the  transferring  Lessor shall be and hereby is entirely  freed and
relieved of all covenants and obligations of the Lessor hereunder; provided that
the purchasing  Lessor of the buildings  assumes and agrees to carry out any and
all covenants and obligations of the Lessor hereunder.

20.  ADVERTISEMENTS  AND SIGNS.  Lessee shall not  inscribe,  paint or affix any
signs,  advertisements,  placecards  or awnings on the  exterior  or roof of the
Premises or upon the entrance doors,  windows, or the sidewalk on or adjacent to
the  Premises  without the prior  written  consent of Lessor.  Lessor  shall not
unreasonably withhold such consent. Any signs so placed on the Premises shall be
so placed upon the  understanding  and agreement that Lessee will remove same at
expiration or  termination of this Lease and will repair any damage or injury to
the Premises  caused thereby,  and if not so removed by Lessee,  then Lessor may
remove it at Lessee's expense.

21.  DESTRUCTION  OF  PREMISES.  If the  building on the  Premises is damaged or
destroyed  by fire,  earthquake,  act of God,  the  elements or as the result of
faulty  construction  or design,  Lessee shall give immediate  notice thereof to
Lessor and the monthly rent due  hereunder  shall be  immediately  reduced by an
amount  equal  to the  amount  of rent  per  square  foot  to be paid  hereunder
multiplied  by the number of unusable  square feet of floor  space.  If any such
damage or  destruction  is covered by  insurance  as  provided in  Paragraph  17
hereof,  Lessor shall,  at Lessor's sole cost and expense,  repair the damage or
destruction  as soon as  possible  after such  damage or  destruction;  provided
however, that if such damage or destruction exceeds thirty-five percent (35%) of
the  replacement  value of the building,  either party may terminate  this Lease
within thirty (30) days after such damage or  destruction.  If neither party has
terminated  this  Lease,  or  the  damage  or  destruction  is  less  than  said
thirty-five  percent (35%),  Lessor shall be responsible for  reconstruction  as
above  provided,  and Lessor  shall be entitled to all real  property  insurance
proceeds.  If this Lease is terminated,  Lessor shall be entitled to receive all
real property  insurance  proceeds less the portion of such  insurance  proceeds
attributable  to Lessee's  equipment and Lessee's  improvements  which have been
paid for or  installed  by Lessee,  which  portion  shall be paid to Lessee.  If
damage or destruction caused by fire, earthquake, acts of God or the elements is
not covered by insurance as provided in Paragraph 17 hereof,  Lessor  shall,  at
Lessor's sole cost and expense, repair the damage as soon as possible after such
damage or  destruction;  provided,  however,  that if such damage or destruction
exceeds  thirty-five  percent  (35%) of the  replacement  value of the building,
either party may terminate  this Lease within thirty (30) days after such damage
or destruction. If damage or destruction caused by fire, earthquake, acts of God
or the  elements is not covered by  insurance as provided in Paragraph 17 hereof
and neither party has  terminated  this Lease,  or the damage or  destruction is
less than said  thirty-five  percent  (35%),  Lessor  shall be  responsible  for
reconstruction as above provided,  but Lessor's expense for said  reconstruction
shall be repaid to Lessor  by Lessee in equal  installments  amortized  over the
remaining  term of this  Lease,  including  any  options  exercised  by  Lessee,
including  interest at a rate of two percent (2%) over the best rate  obtainable
by Lessor for funds used to finance such reconstruction.  22. CONDEMNATION.  The
word "condemnation" or "condemned" as used in this Lease shall mean the exercise
of the power of eminent domain expressed by the condemnor in any writing as well
as by the  filing of any  action or  proceeding  for such  purpose by any entity
having the right of power of eminent domain,  and shall include a voluntary sale
by Lessor to any such  entity,  either  under  threat of  condemnation  or while
condemnation  proceedings are pending,  and "condemnation"  shall occur upon the
actual taking of possession by the condemnor.  In the event the demised Premises
or any part thereof is condemned  and such  condemnation  materially  interferes
with Lessee's use of the Premises,  this Lease shall  terminate,  and Lessor and
Lessee  shall be entitled  to their  respective  interests  in the amount of any
award made with  respect  thereto,  Lessee to receive any  portions of the award
made as compensation for moving expenses,  the value of Lessee's trade fixtures,
equipment,  alterations,  improvements  and  personal  property  which Lessee is
entitled to remove,  and Lessee's loss of business.  The appraisal of the court,
or the condemning  entity if the  condemnation  is not determined by a court, of
the amount of any such award allocable to such items shall be conclusive. If the
total award be fixed by negotiation and be greater than the condemning  entity's
appraisal,  the portion  attributable to such items shall be the same proportion
of the  actual  award as said  items  were of the  entity's  appraisal.  If such
condemnation  does not  materially  interfere with Lessee's use of the Premises,
this Lease shall continue  except that rental shall be reduced for the remainder
of the term of this Lease, as it may be extended, in proportion to the amount of
the Premises  condemned,  using the square footage of the building as a base. In
such event Lessor, at Lessor's  expense,  shall repair and remodel the remainder
of the  Premises  so that the  remaining  Premises  can be used  effectively  by
Lessee.  If  Lessor's  portion  of the award is not  sufficient  to  repair  and
remodel,  then Lessee  shall  reimburse  Lessor for the cost of such repairs and
remodeling to the extent they exceed  Lessor's  portion of the award in the same
manner as provided in the last sentence of Paragraph 21.

23.  WAIVER.  The  waiver  by Lessor 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 or any  subsequent  breach of the same or any other term,
covenant or condition  therein  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
repair.

24.  NON-DISTURBANCE.  Notwithstanding  any subordination of this Lease,  Lessee
shall  have the  right to quiet  possession  and  shall  not be  disturbed  by a
successor in interest to Lessor,  provided  Lessee is not in default  under this
Lease and so long as Lessee shall pay rent and observe all other  provisions  of
this lease.

25. ARBITRATION. In each case where there is a dispute between the parties under
this Lease the dispute shall be settled by arbitration.  Such arbitration  shall
be  determined  as  provided  in this  paragraph  and all  arbitrators  shall be
disinterested persons of at least ten years' experience in an executive capacity
in the active  management of major real  properties  in the Northern  California
area.  The party desiring such  arbitration  shall give notice to that effect to
the other party,  specifying  in said notice the name and address of such person
designated to act as arbitrator on its behalf. Within twenty (20) days after the
service of such  notice,  the other  party  shall give notice to the first party
specifying the name and address of the person designated to act as arbitrator on
its  behalf.  If the  second  party  fails  to  notify  the  first  party of the
appointment  of its  arbitrator,  as  aforesaid,  within  or by the  time  above
specified,  then the appointment of the second  arbitrator  shall be made in the
same manner as hereinafter provided for the appointment of a third arbitrator in
a case where the two arbitrators  appointed hereunder and the parties are unable
to agree upon such appointment.  The arbitrators so chosen shall meet within ten
(10) days after the second arbitrator is appointed.  If the said two arbitrators
shall  not agree  upon the  decision  to be made in such  dispute,  they  shall,
themselves,  appoint a third  arbitrator  who shall be a competent and impartial
person;  and in the event of their failure to make such decision to appoint such
arbitrator within ten (10) days after their meeting,  the third arbitrator shall
be selected by the parties themselves if they can agree thereon within a further
period of fifteen (15) days. If the parties do not so agree,  then either party,
on behalf of both,  may request  the then  presiding  judge of any Court  having
jurisdiction thereof to appoint such third arbitrator, and the other party shall
not raise  any  question  as to the  court's  full  power  and  jurisdiction  to
entertain the  application  and make the appointment and the person so appointed
shall be the third  arbitrator.  The decision of the arbitrators so chosen shall
be given within a period of thirty (30) days after the appointment of such third
arbitrator.  The decision in which any two of the  arbitrators  so appointed and
acting  hereunder  concur shall in all cases be binding and conclusive  upon the
parties.  Each  party  shall  pay the  fees and  expenses  of the one of the two
original  arbitrators  appointed  by such  party,  or in  whose  stead  as above
provided such  arbitrator was appointed,  and the fees and expenses of the third
arbitrator,  if any, shall be borne equally by both parties. Except as otherwise
provided in this Lease,  said arbitration  shall be conducted in accordance with
the rules then obtaining of the American Arbitration  Association,  and judgment
upon any  arbitration  decision  rendered  may be  entered  by any court  having
jurisdiction thereof.

26. NOTICES. All notices to be given hereunder shall be in writing.

27. SUCCESSORS AND ASSIGNS. The covenants and agreements contained in this Lease
shall be  binding  upon the  parties  hereto and upon  their  respective  heirs,
executors, administrators, successors and assigns.

28.  REMEDIES  CUMULATIVE.  The remedies  available to Lessor under the terms of
this  agreement and in law or equity shall be cumulative and the exercise of one
remedy shall not constitute an election of remedies.

29. TIME. Time is of the essence of this Lease.

30. CAPTIONS.  The captions in this Lease are for convenience only and are not a
part  of this  Lease  and do not in any way  limit  or  amplify  the  terms  and
provisions of this Lease.

31. SPECIAL MAINTENANCE.  Lessee shall provide maintenance at least bimonthly to
all air conditioning  and heating  equipment and repair or replace any equipment
when  required,  including  the cost of  labor,  when not  covered  by  existing
warranties.  Lessee shall supply Lessor with a copy of a  maintenance  agreement
contract  with  a  licensed  air  conditioning  service  contractor  or  provide
preventative  maintenance in accordance  with accepted  industry  practice.

32. FLOOR TILE. Lessee shall replace floor tile to Lessor's  satisfaction in the
event tile is not in the same  condition at the expiration of this Lease as when
first received,  exclusive of normal wear and tear, damage by fire,  earthquake,
acts of God or the elements, other casualties or resulting from defects in
construction,  materials or design.

33. RENEWAL OPTIONS. Lessee shall have an option to renew this Lease for fifteen
(15)  consecutive  five (5) year  terms,  commencing  on the  expiration  of the
original  term of this  Lease,  by giving  notice to Lessor at least one hundred
twenty (120) days prior to the expiration of the original,  or the then extended
term, of Lessee's  election to exercise this option to renew. The extended terms
shall be upon all the terms and conditions set forth herein,  including, but not
limited to, Paragraph 34 hereof.

34. RENTAL  INCREASES.  The monthly  rental for each five (5) year period during
which this Lease  remains in force and effect,  commencing  with the sixth (6th)
year of this Lease,  shall  increase by an amount equal to seven percent (7%) of
the monthly rental payable during the five (5) year period immediately preceding
each such period.

35. SHORT FORM. Lessee shall have the right to record a short form of this Lease
and Lessor agrees to assist Lessee in such recordation.

36.  ENTRY.  Prior to the  commencement  of the term of this  Lease,  Lessee and
Lessee's  agents and employees may enter upon the Premises in order to study the
same and  perform  tests  which  Lessee,  in  Lessee's  sole  discretion'  deems
necessary.

37.  EXHIBITS.  Exhibits A and B attached  hereto and to be attached  hereto are
incorporated herein by reference thereto.

IN WITNESS  WHEREOF,  the parties  hereto have executed this Lease as of the day
and year first above written.

"Landlord"

/s/ Carl E. Berg
Carl E. Berg, Trustee of the Berg Living Trust UTA

/s/ Mary Ann Berg by Carl E. Berg her Attorney in Fact
Mary Ann Berg,  Trustee of the Berg Living  Trust UTA

/s/ Clyde Berg by Carl E. Berg his Attorney in Fact
Clyde Berg, Trustee of the Clyde Berg Living  Trust UTA

/s/ Nancy Berg by Carl E. Berg her Attorney in Fact
Nancy Berg, Trustee of the Clyde Berg Living Trust UTA

/s/ Clyde Berg by Carl E.Berg his Attorney in Fact
Clyde Berg, Trustee of the Carl Berg Child's Trust UTA

"Tenant"
AMDAHL CORPORATION

By /s/ E. S. Hartford
E. S. Hartford Director of Facilities





                               Exhibit A to Lease
                                      Plans
                                [to be attached]




                               Exhibit B to Lease
                                Rent Calculation

1. Initial Rent.  Lessee shall pay Lessor monthly rent ("Rent")  during the term
of the Lease and exercised  options  determined  in accordance  with this Rider.
Within thirty (30) days of the commencement of the Lease term, Lessee and Lessor
shall  determine  the  initial  Rent  ("Initial   Rent")  and  shall  execute  a
certificate  setting forth the Initial Rent.  The Initial Rent shall be the Rent
for the entire term of the Lease and exercised options,  subject only to (i) the
rental  increases ("7% Increases") set forth in Section 34 of the Lease and (ii)
possible  adjustment of the Initial Rent in accordance with Paragraphs 4, 5 or 7
of this Exhibit and (iii) any other increases provided for in the Lease.

2. Rent Determination. The Initial Rent shall be calculated by taking the sum of
the following:

      (i) An amount  ("Mortgage  Payment")  equal to the monthly  payment due on
      that certain loan ("Loan") made by Lessee to Lessor for an amount equal to
      Costs, as defined below,  amortized over 30 years at an interest rate of 9
      l/2%, payable monthly in advance.

      (ii) The Guaranteed Cash Flow, as defined below.

Notwithstanding  that Initial Rent is calculated  based on Mortgage  Payment and
Guaranteed Cash Flow, as defined below,  Initial Rent shall not be affected when
the Loan or Loans as provided  herein have been fully  amortized.  Initial  Rent
shall  not be  reduced  when the Loan or Loans  are  fully  amortized  but shall
continue as adjusted by Paragraph l only.

EXAMPLE:

      - Amdahl funds Loan at 9.5% amortized over 30 years.

      - Amdahl  exercises  options and continues to occupy  building at start of
      year 31.

      -Cost = $8,000,000.00


                              
      Initial Rent   =    $82,080.00
                     x          107%
                     ---------------
      Rent 6th Year  =    $87,826.00
                     x          107%
                     ---------------
      Rent 11th Year =    $93,973.00
                     x          107%
                     ---------------
      Rent 16th Year =   $100,551.00
                     x          107%
                     ---------------
      Rent 21st Year =   $107,590.00
                     x          107%
                     ---------------
      Rent 26th Year =   $115,121.00
                     x          107%
                     ---------------
      Rent 31st Year =   $123,794.00
                Etc.


3. Guaranteed Cash Flow. Lessor shall receive a guaranteed net monthly cash flow
("Guaranteed  Cash  Flow")  equal to the  difference  between  (i) the  Mortgage
Payment and (ii) the monthly  payment in advance  required to amortize the Costs
at 11% over 20 years ("Monthly Rent").

EXAMPLE:

                                                         
      9.5% - 30 Years     =    8.35% monthly constant made in advance
      11% - 20 years      =    10.26% monthly constant made in advance

           If Costs       =    $8.000,000.00

      Monthly Rent        =    $8,000,000.00 x .01026 = $82,080
      Mortgage            =    $8,000,000.00 x .00835 =  66,800

                               GUARANTEE CASH FLOW    = $15,280


4.  Permanent  Financing.  Lessee and Lessor  recognize and agree that if Lessee
shall not fund a permanent loan ("Loan") to Lessor for an amount equal to Costs,
as defined in Paragraph 6 hereof, amortized over 30 years at an interest rate of
9 1/2%,  Lessor may obtain  permanent  financing  for the Project  from a source
other than Lessee. In such event, the amount of such permanent  financing may be
less than the aggregate  amount of the unamortized  Costs.  As such,  additional
financing of the Project may be necessary  so that total  financing  shall equal
the unamortized Costs. Any such additional financing may be secured or unsecured
and long-term or short-term,  provided all such  financing  shall be at the best
lending  rate  available  to  Lessor.  Any  such  financing  and the  terms  and
conditions thereof shall be subject to verification and approval by Lessee.

In the event Lessor obtains such additional financing of the Project in order to
achieve  financing in the aggregate amount of the Costs,  Rent payable to Lessor
pursuant to the Lease shall be determined  with reference to a weighted  average
composite  rate  based on the  lending  rates  approved  by  Lessee  for all the
financing for the Project plus the Guaranteed Cash Flow,  provided the aggregate
principal  amount of such financing shall not exceed the  unamortized  Costs and
the Guaranteed Cash Flow remains the same.

In the event Lessor is unable to obtain fixed rate financing for the entire term
of the financings referenced above, notwithstanding the frequency upon which the
interest rate (or other  repayment  mechanism) of such financing may be reviewed
and revised by the lender,  Rent may be reviewed and/or revised as frequently as
any component of the weighted composite rate changes, but in no event more often
than  once in any  12-month  period.  It shall be the  obligation  of  Lessor to
document any changes in the Rent and to provide such  documentation for Lessee's
approval.  Any  adjustment  as provided for in this  Paragraph 4 will be made by
lump sum  payment  to  Lessor  or  credit  to Lessee at the end of each 12 month
period.  Rent for the  following  12 months will be based on actual rates at the
beginning  of the 12-month  period . 5.  Replacement  Loan.  At such time as the
Replacement Loan, as defined in the Note of even date herewith made by Lessor to
Lessee,  shall be funded, the Rent payable to Lessor hereunder shall be adjusted
such that the Rent shall be sufficient to service the Replacement Loan and still
result in Lessor obtaining Lessor's  Guaranteed Cash Flow hereunder.  Lessor and
Lessee shall promptly  execute a new certificate  setting forth the exact amount
of the Rent. At the completion of the  amortization of the Replacement  Loan and
the commencement of year 31 of the Lease term,  monthly Rent shall be calculated
as set forth in the  example  stated in  Paragraph  2, plus any other  increases
provided for in the Lease.

6. Costs. As used herein,  Costs  (hereinafter  "Costs") shall be limited to (i)
the sum of the following  amounts,  fees,  costs and  expenses,  reduced by (ii)
$323, 847.42:

      (a) $5.00 per square foot of the Premises;

      (b) Interest on the difference  ("Carry") between (i) the amount set forth
      in  Paragraph  6(a) and (ii)  $323,847.42,  interest to be  calculated  as
      follows:

           A. Interest on the Carry shall be calculated for the period beginning
           May 1, 1982, and ending on the commencement of the Lease term.

           B.  Interest on the Carry shall be  calculated  and  compounded  on a
           semi-annual  basis until the initial  funding  ("Funding")  of a loan
           ("Security Loan") made by Security Pacific National Bank ("Security")
           for the purpose of financing the  construction  of the  Improvements.
           The interest rate for each 6-month  period shall be the lesser of (i)
           the 6-month  LIBOR rate (or the LIBOR rate for the period most nearly
           corresponding  to  any  period  of  less  than 6  months  immediately
           preceding the  commencement of the Lease term) obtainable by Security
           plus one percent  (1%) or (ii) the prime rate  announced  by Security
           from time to time at its main San  Francisco  office  ("Prime")  plus
           one-half percent (1/2%). Interest on the Carry shall be calculated by
           Lessee  prior to Funding,  subject to Lessor's  reasonable  approval.
           After Funding,  interest on the Carry shall be calculated at the rate
           actually  paid to  Security  for that  portion of the  Security  Loan
           equivalent to the Carry, compounded as charged by Security;

      (c) All payments to contractors performing construction work in connection
      with the Improvements;

      (d) Fees for building  permits,  licenses,  inspection  and any other fees
      imposed by governmental entities;

      (e) Fees of engineers,  architects,  attorneys  (including fees payable to
      Lessor's  counsel with respect to the opinion to be delivered to Lessee in
      connection  with the  funding  of the Loan,  as  defined  below,  and fees
      payable to Lessee's  counsel for which  Lessee is  reimbursed  by Lessor),
      consultants and others providing  professional services in connection with
      the  construction  of  the  Improvements  and  the  Premises  (hereinafter
      collectively  called  "Project");  costs of title  insurance,  escrow  and
      recording fees,  survey costs,  revenue stamps,  mortgage tax, if any, and
      such other  incidental  costs and fees which are  directly  related to the
      construction  of the  Improvements;  provided,  however,  Costs  shall not
      include  expenses  attributable to architects,  engineers,  consultants or
      other  professionals  retained  by  Lessor  as part of  Lessor's  staff or
      administrative personnel;

      (f) Interest with respect to construction  financing,  whether advanced by
      Berg or Security, and lender's, finder's and broker's fees with respect to
      construction  and  permanent  financing  for the Project  (interest  to be
      calculated  from the date of  disbursement  of  Lessor's  checks or, if no
      check is used,  from the date  Lessor's  funds are  otherwise  expended by
      Lessor on construction costs, and in all other respects in accordance with
      Paragraph 6(b)B);

      (g) Real property  taxes levied  against the Project during the period the
      Improvements are being constructed;

      (h) Insurance  premiums and  completion,  performance,  labor and material
      payment bond premiums with respect to the Project;

      (i) Utility installation fees; and

      (j) An amount equal to 3-1/2% of the  aggregate  amounts of Sections  6(c)
      through 6(i), inclusive.

7. Litigation.  Reference is made to Paragraph 6 of this Exhibit B, in which the
term "Costs" is defined as certain fees,  costs and expenses  more  particularly
referenced  in   Subparagraphs   6(a)  through  6(j),   inclusive,   reduced  by
$323,847.42.

Lessee and Lessor recognize that the $323,847.42 referenced in the determination
of Costs is the subject of dispute  between (i) Lessee and (ii) John A. Sobrato,
Susan  R.  Sobrato,  Robert  M.  Granum,  II,  and Kay  Granum,  Carl  E.  Berg,
individually and as trustees,  Mary Ann Berg, Clyde J. Berg, individually and as
trustees, and Nancy Berg, individually and as trustee,  (collectively "Sobrato")
in connection with interpretation of the Option to Lease dated April 3, 1979, by
and among  Lessor,  Sobrato and Lessee.  Sobrato  and Lessor have  brought  that
certain suit No.  526891  ("Suite) in the Superior  Court of the County of Santa
Clara seeking the elimination of said  $323,847.42  from the  determination  and
definition of Costs so that Costs would not be reduced by said  $323,847.42.  In
the event a final holding or  determination of the court in such Suit (after the
expiration  of any  applicable  notice and appeal  periods)  shall  require  the
elimination of said $323,847.42  from the  determination of Costs, so that Costs
would not be so reduced,  the parties hereto agree that said  $323,847.42  shall
not be used in the determination of Costs, so that Costs shall not be reduced by
said sum, and said sum shall not be used in the  determination  of Rent pursuant
to this  Lease.  In such event,  Lessee and Lessor  hereby  agree that  interest
("Land Cost Interest") on $323,847.42, calculated for the same period and in the
same  manner as  provided  in  Paragraph  6(b)A and 6(b)B,  shall be included in
Costs, and Rent shall be adjusted  accordingly,  retroactive to the commencement
of the Lease term,  plus interest on any Rent found to be due  retroactively  in
accordance  with this  Paragraph,  from the date such Rent  would  have been due
under the Lease until paid,  compounded  monthly at Prime plus one percent.  The
sum of $323,847.42 plus Land Cost Interest shall be promptly disbursed by Lessee
to Lessor as an  additional  advance  under the Loan.  In  addition to the above
payment which is an additional advance under the Loan, Lessee shall pay Lessor a
lump sum payment of: (i) interest  compounded  monthly at Prime plus one percent
calculated from the  commencement of the Lease until settlement of the Suit or a
final holding or  determination  of the court in such Suit (after the expiration
of any applicable notice and appeal periods),  (ii) interest  compounded monthly
at Prime plus one on the difference between Rent actually paid by Lessee and the
adjusted Rent hereunder,  and (iii)  retroactive  adjusted Rent not paid, all of
which shall not be considered as an advance under the Loan.

Notwithstanding  the foregoing,  nothing herein shall constitute an admission by
any party hereto as to the truth, adequacy or legal sufficiency of any merits or
arguments  in  connection  with  any  suit,  action  or  proceeding  brought  in
connection  with the  issues  referenced  herein and  neither  Lessee nor Lessor
intend to prejudice any legal  position of either party in  connection  with any
suit,  action  or  proceeding;  but  the  parties  intend  to  abide  by a final
determination (after the expiration of any applicable notice and appeal periods)
of a court in such matter.

This  Paragraph 7 is being  written at the request of Lessor in order to clarify
the intentions of the parties with respect to the Suit.

The parties agree that the Option to Lease  referenced  above shall  continue in
force and effect to the extent that it pertains to the Suit,  but that otherwise
as between  Lessor and Lessee  said  Option to Lease is of no force or effect of
any nature.

IN WITNESS  WHEREOF,  the parties  hereto have executed this Exhibit B as of the
21st day of November 1993.

 "Landlord"
/s/ Carl E. Berg
Carl E. Berg,  Trustee of the Berg Living Trust UTA /s/ Mary Ann Berg by Carl E.
Berg her  Attorney in Fact Mary Ann Berg,  Trustee of the Berg Living  Trust UTA
/s/ Clyde Berg by Carl E. Berg his  Attorney in Fact Clyde Berg,  Trustee of the
Clyde Berg Living  Trust UTA /s/ Nancy Berg by Carl E. Berg her Attorney in Fact
Nancy Berg, Trustee of the Clyde Berg Living Trust UTA /s/ Clyde Berg by Carl E.
Berg his Attorney in Fact Clyde Berg, Trustee of the Carl Berg Child's Trust UTA

"Tenant"
AMDAHL CORPORATION

By /s/ E. S. Hartford
E. S. Hartford Director of Facilities





                               AMENDMENT TO LEASE
THIS  AMENDMENT  TO LEASE  ("Amendment")  is entered  into this 17th day of May,
1989,  by  and  between  Berg  &  Berg  Developers   ("Landlord  ")  and  AMDAHL
CORPORATION.  a Delaware  corporation  ("Tenant")  THE  PARTIES  ENTER INTO THIS
AMENDMENT based upon the following facts, understandings and intentions:

A. Landlord and Tenant entered into that certain lease  ("Lease") dated April 3,
1979,  pursuant to which Landlord agreed to lease to Tenant the building located
at 2251 Lawson Lane, Santa Clara, CA ("Building") as more fully described in the
Lease.

B. Landlord and Tenant now desire to modify the  obligations of the Tenant found
in the Lease  regarding  approval of  alterations,  as further  described in the
terms and conditions set forth in this  Amendment.  The  capitalized  terms used
herein (unless  otherwise  defined  herein) shall have the meanings set forth in
the Lease.

NOW,  THEREFORE,  in  consideration  of the mutual  covenants and agreements set
forth  herein,  and for other good and valuable  consideration,  the receipt and
sufficiency  of  which is  hereby  acknowledged,  the  parties  hereto  agree as
follows:

1. Alterations.  Notwithstanding  anything to the contrary found in Section 5 of
the Lease,  Tenant  need not obtain  Landlord's  consent to make  non-structural
alterations,  additions  or  improvements  which do not  affect  the  Building's
systems until the cost of any such  alteration,  addition or improvement made or
proposed to be made by Tenant exceeds Fifty Thousand  Dollars  ($50,000.00)  per
alteration, addition or improvement.

2. Full Force and Effect.  Except as amended  hereby,  the terms,  covenants and
conditions contained in the Lease shall remain in full force and effect.

IN WITNESS  WHEREOF,  the parties  hereto have executed this Amendment as of the
day and year first above written.

"Landlord":
Berg & Berg Developers

By: /s/ Carl E. Berg
It: General Partner

"Tenant":
AMDAHL CORPORATION
A Delaware Corporation

By: /s/ Bruce Eaton
Bruce Eaton, Manager
Corporate Real Estate





                               AMENDMENT TO LEASE
THIS  AMENDMENT  TO LEASE  ("Amendment")  is entered  into this 17th day of May,
1989,  by  and  between  Berg  &  Berg  Developers   ("Landlord  ")  and  AMDAHL
CORPORATION.  a Delaware  corporation  ("Tenant")  THE  PARTIES  ENTER INTO THIS
AMENDMENT based upon the following facts, understandings and intentions:

A. Landlord and Tenant entered into that certain lease  ("Lease") dated April 3,
1979,  pursuant to which Landlord agreed to lease to Tenant the building located
at 3120 Scott Boulevard, Santa Clara, CA ("Building") as more fully described in
the Lease.

B. Landlord and Tenant now desire to modify the  obligations of the Tenant found
in the Lease  regarding  approval of  alterations,  as further  described in the
terms and conditions set forth in this  Amendment.  The  capitalized  terms used
herein (unless  otherwise  defined  herein) shall have the meanings set forth in
the Lease.

NOW,  THEREFORE,  in  consideration  of the mutual  covenants and agreements set
forth  herein,  and for other good and valuable  consideration,  the receipt and
sufficiency  of  which is  hereby  acknowledged,  the  parties  hereto  agree as
follows:

1. Alterations.  Notwithstanding  anything to the contrary found in Section 5 of
the Lease,  Tenant  need not obtain  Landlord's  consent to make  non-structural
alterations,  additions  or  improvements  which do not  affect  the  Building's
systems until the cost of any such  alteration,  addition or improvement made or
proposed to be made by Tenant exceeds Fifty Thousand  Dollars  ($50,000.00)  per
alteration, addition or improvement.

2. Full Force and Effect.  Except as amended  hereby,  the terms,  covenants and
conditions contained in the Lease shall remain in full force and effect.

IN WITNESS  WHEREOF,  the parties  hereto have executed this Amendment as of the
day and year first above written.

"Landlord":
Berg & Berg Developers

By: /s/ Carl E. Berg
It: General Partner

"Tenant":
AMDAHL CORPORATION
A Delaware Corporation

By: /s/ Bruce Eaton
Bruce Eaton, Manager
Corporate Real Estate





AMDAHL CORPORATION
1250 EAST ARQUES AVENUE
SUNNYVALE, CALIFORNIA 94088-3470
PHONE: 408-746-6000
TWX 910-773-0833

March 18, 1997

Mr. John Sobrato
Sobrato-Berg Properties
2775 Middlefield Road
Palo Alto, CA 94306

Subject:   M-3 Lease Occupancy

Dear John:

The City of Sunnyvale approved building M-3 for occupancy on Thursday afternoon,
March 10, 1977.  Therefore,  Amdahl  Corporation  will  commence rent on Friday,
March 11, 1977.

The first month's rent (March 11,1977 through April 10,1977) of $19,000 has been
prepaid as a deposit at the time of lease  negotiations  in 1976.  Next  month's
rent (April) will be prorated  from April 11 through  April 30, 1977.  (19/30 of
$19,000 = $12.033.33)

After all costs are  finalized  and all of the  invoices  paid,  I will set up a
meeting  with you and Tom Lerone to make the  adjustments  for the final  rental
calculations as per lease agreement.

I trust this meets with your satisfaction.

Sincerely,
AMDAHL CORPORATION

/s/ Don L. Beck
Don L. Beck
Manager, Facilities

DLB:pk

700-51-77

cc:   T. Lerone
      S. Hose
      C. Madden
      M. DiIorio
      L. Chorney
      G. Kelsey





AMDAHL CORPORATION
1250 EAST ARQUES AVENUE
P.O. BOX 3470
SUNNYVALE, CALIFORNIA 94088-3470
PHONE: (408) 746-6000
FAX (408) 773-0833

November 2, 1993

Mr. Carl E. Berg
Berg & Berg Developers
10050 Bandley Drive
Cupertino, CA 95014

Re: 1230 E Arques Avenue, Sunnyvale

Dear Mr. Berg:

As  referenced  in our notice of October  21,  1993  (letter  attached),  Amdahl
exercised  it's option to renew and will continue in possession of said building
for an additional five (5) years beginning March 1, 1994 and ending February 28,
1999.

As the wording in that letter was ambiguous as to the rental  payments due, this
letter will serve to clarify same. The current and  continuing  rent at the time
of renewal will be $23,806.26 is month.  According to paragraph 34 of the lease,
the next rent  increase  will occur at the end of the  current  five year period
under this lease,  on March 12, 1997.  At that time the rent will increase 7% to
$25,472.70.

Please  acknowledge  receipt of this  letter by signing  one  original  copy and
returning it to my attention. Thank you.

Sincerely,

/s/ Edward S. Hartford
Edward S. Hartford
Vice President
Corporate Facilities

Attachment

Acknowledge:

/s/ Carl E. Berg
Carl E. Berg
Berg & Berg Developers
Date 11/9/93