1
                                                                  Exhibit 10.10

                                 LEASE AGREEMENT

         THIS LEASE, made this 4th day of June, 1996, between CROSSROADS
ASSOCIATES AND CLOCKTOWER ASSOCIATES, hereinafter called "Landlord," and SIEBEL
SYSTEMS, INC. a California Corporation, hereinafter called "Tenant."

                                   WITNESSETH:

         Landlord hereby leases to Tenant and Tenant hereby hires and takes from
Landlord those certain premises (the "Premises") outlined in red on Exhibit A1
through A4 attached hereto and incorporated herein by this reference thereto
more particularly described as follows: The entire five story Building located
at 1855 South Grant Street, San Mateo, San Mateo County, California. The total
rentable area of the five story Building is approximately 66,426 square feet. 

As used herein the Complex shall mean and include all of the land outlined in
red and described in Exhibit A1 through A4 attached hereto, and all of the
buildings. improvements, fixtures and equipment now or hereafter situated on
said land.

         Landlord agrees to construct such improvements as are set forth in
Exhibit "C" attached hereto, and upon such terms and conditions as set forth in
Exhibit "D" attached hereto and incorporated herein by this reference thereto.

         Said letting and hiring is upon and subject to the terms, covenants and
conditions hereinafter set forth and Tenant covenants as a material part of the
consideration for this Lease to perform and observe each and all of said terms,
covenants and conditions. This Lease is made upon the conditions of such
performance and observance.

1. USE   Tenant shall use the Premises only in conformance with applicable
governmental laws, regulations, rules and ordinances for the purpose of General
Office and for no other purpose. Tenant shall not do or permit to be done in or
about the Premises or the Complex nor bring or keep or permit to be brought or
kept in or about the Premises or the Complex anything which is prohibited by or
will in any way increase the existing rate of (or otherwise affect) fire or any
insurance covering the Complex or any part thereof, or any of its contents, or
will cause a cancellation of any insurance covering the Complex or any part
thereof, or any of its contents. Tenant shall not do or permit to be done
anything in, on or about the Premises or the Complex which will in any way
obstruct or interfere with the tights of other tenants or occupants of the
Complex or injure or annoy them, or use or allow the Premises to be used for any
improper, immoral, unlawful or objectionable purpose, nor shall Tenant cause,
maintain or permit any nuisance in, on or about the Premises or the Complex. No
sale by auction shall be permitted on the Premises. Tenant shall not place any
loads upon the floors, walls, or ceiling, which endanger the structure, or place
any harmful fluids or other materials in the drainage system of the building, or
overload existing electrical or other mechanical systems. No waste materials or
refuse shall be dumped upon or permitted to remain upon any part of the Premises
or outside of the

   2


building in which the Premises are a part, except in trash containers placed
inside exterior enclosures designated by Landlord for that purpose or inside of
the building proper where designated by Landlord. No materials, supplies,
equipment, finished products or semi-finished products, raw materials or
articles of any nature shall be stored upon or permitted to remain outside the
Premises or on any portion of common area of the Complex. No loudspeaker or
other device, system or apparatus which can be heard outside the Premises shall
be used in or at the Premises without the prior written consent of Landlord.
Tenant shall not commit or suffer to be committed any waste in or upon the
Premises. Tenant shall indemnify, defend and hold Landlord harmless against any
loss, expense, damage, attorneys' fees, or liability arising out of failure of
Tenant to comply with any applicable law. Tenant shall comply with any covenant,
condition, or restriction ("CC&R's") affecting the Premises. The provisions of
this paragraph are for the benefit of Landlord only and shall not be construed
to be for the benefit of any tenant or occupant of the Complex.

2. TERM

         A. The term of this Lease shall be for a period of Ten (10) years 
(unless sooner terminated as hereinafter provided) and, subject to
Paragraphs 2(B) and 3, shall commence on the 1st day of August, 1996, and 
end on the 31st day of July, 2006.


         B. Possession of the Premises shall be deemed tendered and the term of
this Lease shall commence when the first of the following occurs:

                  (1) One day after a Certificate of Occupancy is granted by the
proper governmental agency, or, if the governmental agency having jurisdiction
over the area in which the Premises are situated does not issue certificates of
occupancy, then the same number of days after certification by Landlord's
architect or contractor that Landlord's construction work has been completed; or

                  (2) Upon the occupancy of the Premises by any of Tenant's
operating personnel; or

                  (3) N/A.

3. POSSESSION   If Landlord, for any reason whatsoever, cannot deliver
possession of said Premises to Tenant at the commencement of the said term, as
hereinbefore specified, this Lease shall not be void or voidable; no obligation
of Tenant shall be affected thereby; nor shall Landlord or Landlord's agents be
liable to Tenant for any loss or damage resulting therefrom; but in that event
the commencement and termination dates of the Lease, and all other dates
affected thereby shall be reissued to conform to the date of Landlord's delivery
of possession, as specified in Paragraph 2 (b), above. The above is, however,
subject to the provision that the period of delay of delivery of the Premises
shall not exceed 60 days from the commencement date herein (except those
delays caused by Acts of God, strikes, war, utilities, governmental bodies,
weather, unavailable materials, and delays beyond Landlord's control shall be
excluded in calculating such period) in which instance Tenant, at its option,
may, by written notice to Landlord, terminate this Lease.

4. RENT

         A. Basic Rent. Tenant agrees to pay to Landlord at such place as
Landlord may designate without deduction, offset, prior notice, or demand, and
Landlord agrees to accept as Basic Rent for the leased Premises the total sum of
Fifteen million, Five Hundred Forty Three Thousand, Six Hundred Eighty Four 




                                      -2-
   3



($15,543,684.00) Dollars in lawful money of the United States of America, 
payable as follows:

$129,530.70 (66,426 x $1.95) shall be due and payable upon execution of this 
Lease and shall represent payment of the Basic Rent for the first month of the 
Lease term. This amount shall be due and payable for the first twelve months of 
the Lease term. The monthly Basic Rent shall be due and payable on or before
the first day of each month of the Lease term.

Monthly Basic Rent shall be adjusted according to paragraph 38.

This paragraph continues on page 10 below.

It is agreed that, as the Basic Rent provided for herein is adjusted according
to Paragraph 38, the total Basic Rent and schedule of payments described above
shall be adjusted accordingly.

         B. Time for Payments. In the event that the term of this Lease
commences on a date other than the first day of a calendar month, on the date of
commencement of the term hereof Tenant shall pay to Landlord as rent for the
period from such date of commencement to the first day of the next succeeding
calendar month that proportion of the monthly rent hereunder which the number of
days between such date of commencement and the first day of the next succeeding
calendar month bears to thirty (30). In the event that the term of this Lease
for any reason ends on a date other than the last day of a calendar month, on
the first day of the last calendar month of the term hereof Tenant shall pay to
Landlord as rent for the period from said first day of said last calendar month
to and including the last day of the term hereof that proportion of the monthly
rent hereunder which the number of days between said first day of said last
calendar month and the last day of the term hereof bears to thirty (30).

         C. Late Charge. Notwithstanding any other provision of this Lease, if
Tenant is in default in the payment of rent as set forth in this Paragraph 4
when due, or any part thereof, Tenant agrees to pay Landlord, in addition to the
delinquent rental due, a late charge for each rental payment in default ten (10)
days. Said late charge shall equal ten (10%) percent of each rental payment so
in default.

         D. Additional Rent. Beginning with the commencement date of the term of
this Lease, Tenant shall pay to Landlord in addition to the Basic Rent and as
Additional Rent the following:

         (1)      Tenant's proportionate share of all utilities relating to the
                  Complex as set forth in Paragraph 11, and

         (2)      Tenant's Proportionate share of all Taxes relating to the
                  Complex as set forth in Paragraph 12, and

         (3)      Tenant's proportionate share of all insurance premiums
                  relating to the Complex, as set forth in Paragraph 15, and

         (4)      Tenant's proportionate share of expenses for the operation,
                  management, maintenance and repair of the Building (including
                  common areas of the Building) and Common Areas of the Complex
                  in which the Premises are located as set forth in Paragraph 7,
                  and

         (5)      All charges, costs and expenses, which Tenant is required to
                  pay hereunder, together with all interest and penalties, costs
                  and expenses including attorneys' fees and legal expenses,
                  that may accrue thereto in the event of Tenant's failure to
                  pay such amounts, and all damages, reasonable costs and
                  expenses which Landlord may incur by reason of default of
                  Tenant or failure on Tenant's part to comply with the terms of
                  this Lease. In the event of nonpayment by Tenant of Additional
                  Rent,



                                      -3-
   4




                  Landlord shall have all the rights and remedies with respect
                  thereto as Landlord has for nonpayment of rent.

Tenant shall pay to Landlord monthly, in advance, Tenant's prorata share of an
amount estimated by Landlord to be Landlord's approximate average monthly
expenditure for such Additional Rent items, which estimated amount shall be
reconciled at the end of each calendar year as compared to Landlord's actual
expenditure for said Additional Rent items, with Tenant paying to Landlord, upon
demand, any amount of actual expenses expended by Landlord in excess of said
estimated amount, or Landlord refunding to Tenant (providing Tenant is not in
default in the performance of any of the terms, covenants and conditions of this
Lease) any amount of estimated payments made by Tenant in excess of Landlord's
actual expenditures for said Additional Rent items.

         Tenant's payment for such Additional Rent as of the commencement of the
term of this lease shall be Twenty Seven Thousand Nine Hundred and 00/100 
($27,900.00) Dollars per month. Any payments required to be made by Tenant for
Additional Rent shall be made by check or instrument separate from that check or
instrument used by Tenant to make any payments for Basic Rent, pursuant to
paragraph 4 A. This paragraph is continued below.

         The respective obligations of Landlord and Tenant under this paragraph
shall survive the expiration or other termination of the term of this Lease, and
if the term hereof shall expire or shall otherwise terminate on a day other than
the last day of a calendar year, the actual Additional Rent incurred for the
calendar year in which the term hereof expires or otherwise terminates shall be
determined and settled on the basis of the statement of actual Additional Rent
for such calendar year and shall be prorated in the proportion which the number
of days in such calendar year preceding such expiration or termination bears to
365.

         E. Place of Payment of Rent and Additional Rent. All Basic Rent
hereunder and all payments hereunder for Additional Rent shall be paid to
Landlord at the office of Landlord at 3201 Ash Street, Palo Alto, CA 94306 
or to such other person or to such other place as Landlord may from time to
time designate in writing.

         F. Security Deposit. Concurrently with Tenant's execution of this
Lease, Tenant shall deposit with Landlord the sum of One Hundred Seventy Five
Thousand and 00/100 ($175,000.00) Dollars. Said sum shall be held by Landlord as
a Security Deposit for the faithful performance by Tenant of all of the terms,
covenants, and conditions of this Lease to be kept and performed by Tenant
during the term hereof. If Tenant defaults with respect to any provision of this
Lease, including, but not limited to, the provisions relating to the payment of
rent and any of the monetary sums due herewith, Landlord may (but shall not be
required to) use, apply or retain all or any part of this Security Deposit for
the payment of any other amount which Landlord may spend by reason of Tenant's
default or to compensate Landlord for any other loss or damage which Landlord
may suffer by reason of Tenant's default. If any portion of said Deposit is so
used or applied, Tenant shall, within ten (10) days after written demand
therefor, deposit cash with Landlord in the amount sufficient to restore the
Security Deposit to its original amount. Tenant's failure to do so shall be a
material breach of this Lease. Landlord shall not be required to keep this
Security Deposit separate from its general funds, and Tenant shall not be
entitled to interest on such Deposit. If Tenant fully and faithfully performs
every provision of this Lease to be performed by it, the Security Deposit or any
balance thereof shall be returned to Tenant (or at


                                      -4-
   5



Landlord's option, to the last assignee of Tenant's interest hereunder) at the
expiration of the Lease term and after Tenant has vacated the Premises. In the
event of termination of Landlord's interest in this Lease, Landlord shall
transfer said Deposit to Landlord's successor in interest whereupon Tenant
agrees to release Landlord from liability for the return of such Deposit or the
accounting therefor. This paragraph is continued below.

5. RULES AND REGULATIONS AND COMMON AREA   Subject to the terms and conditions
of this Lease and such Rules and Regulations as Landlord may from time to time
prescribe, Tenant and Tenant's employees, invitees and customers shall, in
common with other occupants of the Complex in which the Premises are located,
and their respective employees, invitees and customers, and others entitled to
the use thereof, have the non-exclusive right to use the access roads, parking
areas, and facilities provided and designated by Landlord for the general use
and convenience of the occupants of the Complex in which the Premises are
located, which areas and facilities are referred to herein as "Common Area".
This right shall terminate upon the termination of this Lease. Landlord reserves
the right from time to time to make changes in the shape, size, location, amount
and extent of Common Area. Landlord further reserves the right to promulgate
such reasonable rules and regulations relating to the use of the Common Area,
and any part or parts thereof, as Landlord may deem appropriate for the best
interests of the occupants of the Complex. The Rules and Regulations shall be
binding upon Tenant upon delivery of a copy of them to Tenant, and Tenant shall
abide by them and cooperate in their observance. Such Rules and Regulations may
be amended by Landlord from time to time, with or without advance notice, and
all amendments shall be effective upon delivery of a copy to Tenant. Landlord
shall not be responsible to Tenant for the non-performance by any other tenant
or occupant of the Complex of any of said Rules and Regulations.

         Landlord shall operate, manage and maintain the Common Area. The manner
in which the Common Area shall be maintained and the expenditures for such
maintenance shall be at the discretion of Landlord.

6. PARKING   Tenant shall have the right to use with other tenants or occupants
of the Complex 200 parking spaces in the common parking areas of the Complex.
Tenant agrees that Tenant, Tenant's employees, agents, representatives and/or
invitees shall not use parking spaces in excess of said 200 spaces allocated to
Tenant hereunder. Landlord shall have the right, at Landlord's sole discretion,
to specifically designate the location of Tenant's parking spaces within the
common parking areas of the Complex (and such designation shall be on a
non-discriminatory and equitable basis) in the event of a dispute among the
tenants occupying the building and/or Complex referred to herein, in which event
Tenant agrees that Tenant, Tenant's employees, agents, representatives and/or
invitees shall not use any parking spaces other than those parking spaces
specifically designated by Landlord for Tenant's use. Said parking spaces, if
specifically designated by Landlord to Tenant, may be relocated by Landlord at
any time, and from time to time. Landlord reserves the right, at Landlord's sole
discretion, to rescind any specific designation of parking spaces, thereby
returning Tenant's parking spaces to the common parking area. Landlord shall
give Tenant written notice of any change in Tenant's parking spaces. Tenant
shall not, at any time, park, or permit to be parked, any trucks or vehicles
adjacent to the loading areas so as to interfere in any way with the use of such
areas, nor shall Tenant at any time park, or permit the parking of Tenant's
trucks or other vehicles or the trucks and vehicles of Tenant's suppliers or
others, in any portion of the common area not designated by Landlord for such
use by Tenant. Tenant shall not park nor permit to be parked, any inoperative
vehicles or equipment on any portion of the common parking area or other common
areas of the Complex. Tenant agrees to assume responsibility for compliance by
its employees with the parking provision contained herein. If Tenant or its
employees park in other than such designated parking areas, then 


                                      -5-
   6



Landlord may charge Tenant, as an additional charge, and Tenant agrees to pay,
ten ($10.00) Dollars per day for each day or partial day each such vehicle is
parked in any area other than that designated. Tenant hereby authorizes Landlord
at Tenant's sole expense to tow away from the Complex any vehicle belonging to
Tenant or Tenant's employees parked in violation of these provisions, or to
attach violation stickers or notices to such vehicles. Tenant shall use the
parking areas for vehicle parking only, and shall not use the parking areas for
storage. Landlord hereby agrees to designate 4 parking spaces as "Reserved" as
indicated in blue on Exhibit A-1 and 4 parking spaces as "Visitor" as indicated
in green on Exhibit A-1.

7. EXPENSES OF OPERATION, MANAGEMENT AND MAINTENANCE OF THE COMMON AREAS OF THE
COMPLEX, PREMISES AND BUILDING IN WHICH THE PREMISES ARE LOCATED   As Additional
Rent and in accordance with Paragraph 4 D of this Lease, Tenant shall pay to
Landlord Tenant's proportionate share (calculated on a square footage or other
equitable basis as calculated by Landlord) of all expenses of operation,
management, maintenance and repair of the Common Areas of the Complex including,
but not limited to, license, permit and inspection fees; security; utility
charges associated with exterior landscaping and lighting (including water and
sewer charges); all charges incurred in the maintenance of landscaped areas,
lakes, parking lots, sidewalks, driveways; maintenance, repair and replacement
of all fixtures and electrical, mechanical and plumbing systems; structural
elements and exterior surfaces of the buildings; salaries and employee benefits
of personnel and payroll taxes applicable thereto; supplies, materials,
equipment and tools; the cost of capital expenditures which have the effect of
reducing operating expenses, provided, however, that in the event Landlord makes
such capital improvements, Landlord may amortize its investment in said
improvements (together with interest at _____ prime rate ___ percent per
annum on the unamortized balance) as an operating expense in accordance with
standard accounting practices, provided, that such amortization is not at a rate
greater than the anticipated savings in the operating expenses.


         As Additional Rent and in accordance with paragraph 4D of this Lease,
Tenant shall pay its proportionate share (calculated on a square footage or
other equitable basis as calculated by Landlord) of the cost of operation
(including common utilities), management, maintenance and repair of the Premises
and the building (including common areas such as lobbies, restrooms, janitor's
closets, hallways, elevators, mechanical and telephone rooms, stairwells,
entrances, spaces above the ceilings) in which the Premises are located. The
maintenance items herein referred to include, but are not limited to,
janitorization, electrical systems (such as outlets, lighting fixtures, lamps,
bulbs, tubes, ballasts), heating and air conditioning controls (such as mixing
boxes, thermostats, time clocks, supply and return grills), all interior
improvements within the Premises including but not limited to: wall coverings,
window coverings, acoustical ceilings, vinyl tile, carpeting, partitioning,
doors (both interior and exterior, including closing mechanisms, latches,
locks), and all other interior improvements of any nature whatsoever, all
windows, window frames, plate glass, glazing, truck doors, main plumbing systems
of the building (such as water and drain lines, sinks, toilets, faucets, drains,
showers and water fountains. main electrical systems (such as panels and
conduits), heating and air conditioning systems (such as compressors, fans, air
handlers, ducts, boilers, heaters), store fronts, roofs, downspouts, building
common area interiors (such as wall coverings, window coverings, floor coverings
and partitioning), ceilings, building exterior doors, skylights (if any),
automatic fire extinguishing systems and elevators; license, permit, and
inspection fees; security; salaries and employee benefits of personnel and
payroll taxes applicable thereto; supplies, materials, equipment and tools; the
cost of capital expenditures which have the effect of reducing operating
expenses, provided, however, that in the event Landlord makes such capital
improvements, Landlord may amortize its investment in said improvements
(together with interest at ___________ prime rate __________ per annum on the
unamortized balance) as an operating expense in accordance with standard


                                      -6-
   7




accounting practices, provided, that such amortization is not at a rate greater
than the anticipated savings in the operating expenses. Tenant hereby waives all
rights under, and benefits of, subsection I of Section 1932 and Sections 1941
and 1942 of the California Civil Code and under any similar law, statute or
ordinance now or hereafter in effect. Tenant agrees to be responsible for wear
and tear of the carpet caused by rolling chairs if such wear and tear
exceeds that caused by normal foot traffic in surrounding areas. Areas of
excessive wear shall be replaced at Tenant's sole expense upon Lease
termination.

         "Additional Rent" as used herein shall not include Landlord's debt
repayments; interest on charges; expenses directly or indirectly incurred by
Landlord for the benefit of any other tenant; cost for the installation of
partitioning or any other tenant improvements; cost of attracting tenants;
depreciation; interest, or executive salaries.

         Landlord agrees to provide five-day janitorial service for the leased
Premises and to maintain the Complex in a first-class manner.

8. ACCEPTANCE AND SURRENDER OF PREMISES   By entry hereunder, Tenant accepts the
Premises as being in good and sanitary order, condition and repair and accepts
the building and improvements included in the Premises in their present
condition and without representation or warranty by Landlord as to the condition
of such building or as to the use or occupancy which may be made thereof. Any
exceptions to the foregoing must be by written agreement executed by Landlord
and Tenant. Tenant agrees on the last day of the Lease term, or on the sooner
termination of this Lease, to surrender the Premises promptly and peaceably to
Landlord in good condition and repair (damage by Acts of God, fire or normal
wear and tear excepted), with all interior walls painted, or cleaned so that
they appear freshly painted, and repaired and replaced, if damaged; all floors
cleaned and waxed; all carpets cleaned and shampooed; the air conditioning and
heating equipment serviced by a reputable and licensed service firm and in good
operating condition (provided the maintenance of such equipment has been
Tenant's responsibility during the term of this Lease) together with all
alterations, additions and improvements which may have been made in, to, or on
the Premises (except movable trade fixtures installed at the expense of Tenant)
except that Tenant shall ascertain from Landlord within thirty (30) days before
the end of the term of this Lease whether Landlord desires to have the Premises
or any part or parts thereof restored to their condition and configuration as
when the Premises were delivered to Tenant and if Landlord shall so desire, then
Tenant shall restore said Premises or such part or parts thereof before the end
of this Lease at Tenant's sole cost and expense. Tenant, on or before the end of
the term or sooner termination of this Lease, shall remove all of Tenant's
personal property and trade fixtures from the Premises, and all property not so
removed on or before the end of the term or sooner termination of this Lease
shall be deemed abandoned by Tenant and title to same shall thereupon pass to
Landlord without compensation to Tenant. Landlord may, upon termination of this
Lease, remove all moveable furniture and equipment so abandoned by Tenant, at
Tenant's sole cost, and repair any damage caused by such removal at Tenant's
sole cost. If the Premises be not surrendered at the end of the term or sooner
termination of this Lease, Tenant shall indemnify Landlord against loss or
liability resulting from the delay by Tenant in so surrendering the Premises
including, without limitation, any claims made by any succeeding tenant founded
on such delay. Nothing contained herein shall be construed as an extension of
the term hereof or as a consent of Landlord to any holding over by Tenant. The
voluntary or other surrender of this Lease or the Premises by Tenant or a mutual
cancellation of this Lease shall not work as a merger and, at the option of
Landlord, shall either terminate all or any existing subleases or subtenancies
or operate as an assignment to Landlord of all or any such subleases or
subtenancies.


                                      -7-
   8



9. ALTERATIONS AND ADDITIONS   Tenant shall not make, or suffer to be made, any
alteration or addition to the Premises, or any part thereof, without the written
consent of Landlord first had and obtained by Tenant, but at the cost of Tenant,
and any addition to, or alteration of, the Premises, except moveable furniture
and trade fixtures, shall at once become a part of the Premises and belong to
Landlord. If Landlord consents to the making of any alteration, addition, or
improvement to or of the Premises by Tenant, the same shall be made by Landlord
at Tenant's sole cost and expense. At the time such modifications are requested,
Landlord shall identify which items, if any, shall be subject to the restoration
provision of paragraph 8. Any modifications to the building or building systems
required by governmental code or otherwise as a result of Tenant's alterations,
additions or improvements shall be made at Tenant's sole cost and expense.
Tenant shall retain title to all moveable furniture and trade fixtures placed in
the Premises. All heating, lighting, electrical, air conditioning, partitioning,
drapery, carpeting and floor installations made by Tenant, together with all
property that has become an integral part of the Premises, shall not be deemed
trade fixtures. Tenant agrees that it will not proceed to make any alterations
or additions, without having obtained consent from Landlord to do so, and until
five (5) days from the receipt of such consent, in order that Landlord may post
appropriate notices to avoid any liability to contractors or material suppliers
for payment for Tenant's improvements. Tenant will at all times permit such
notices to be posted and to remain posted until the completion of work. Tenant
shall, if required by Landlord, secure at Tenant's own cost and expense, a
completion and lien indemnity bond, satisfactory to Landlord, for such work.
Tenant further covenants and agrees that any mechanic's lien filed against the
Premises or against the Complex for work claimed to have been done for, or
materials claimed to have been furnished to Tenant, will be discharged by
Tenant, by bond or otherwise, within ten (10) days after the fling thereof, at
the cost and expense of Tenant. Any exceptions to the foregoing must be made in
writing and executed by both Landlord and Tenant. This paragraph continues
below. 

11. UTILITIES OF THE BUILDING IN WHICH THE PREMISES ARE LOCATED   As Additional
Rent and in accordance with paragraph 4D of this Lease, Tenant shall pay its
proportionate share (calculated on a square footage or other equitable basis as
calculated by Landlord) or the cost of all utility charges such as water, gas,
electricity, telephone, telex and other electronic communications service, sewer
service, waste pick-up and any other utilities, materials or services furnished
directly to the building in which the Premises are located, including, without
limitation, any temporary or permanent utility surcharge or other exactions
whether or not hereinafter imposed.

         Landlord shall not be liable for and Tenant shall not be entitled to
any abatement or reduction of rent by reason of any interruption or failure of
utility services to the Premises when such interruption or failure is caused by
accident, breakage, repair, strikes, lockouts or other labor disputes of any
nature, or by any other cause, similar or dissimilar, beyond the reasonable
control of Landlord.

         Provided that Tenant is not in default in the performance or observance
of any of the terms, covenants or conditions of this Lease to be performed or
observed by it, Landlord shall furnish to 

                                      -8-

   9
the Premises between the hours of 8:00AM and 6:00PM, Mondays through Fridays
(holidays excepted) and subject to the rules and regulations of the Complex
hereinbefore referred to, reasonable quantities of water, gas and electricity
suitable for the intended use of the Premises and heat and air conditioning
required in Landlord's judgment for the comfortable use and occupation of the
Premises for such purposes. Tenant agrees that at all times it will cooperate
fully with Landlord and abide by all regulations and requirements that Landlord
may prescribe for the proper functioning and protection of the building heating,
ventilating and air conditioning systems. Whenever heat generating machines,
equipment, or any other devices (including exhaust fans) are used in the
Premises by Tenant which affect the temperature or otherwise maintained by the
air conditioning system, Landlord shall have the right to install supplementary
air conditioning units on the Premises and the costs thereof, including the cost
of installation and the cost of operation and maintenance thereof, shall be paid
by Tenant to Landlord upon demand by Landlord. If Tenant shall require water, 
gas or electric current in excess of that usually furnished or supplied to
premises being used as general office space, Tenant shall first obtain the
written consent of Landlord, which consent shall not be unreasonably withheld
and Landlord may cause an electric current, gas, or water meter to be installed
in the Premises in order to measure the amount of electric current, gas or water
consumed for any such excess use. The cost of any such meter and of the
installation, maintenance and repair thereof, all charges for such excess water,
gas and electric current consumed (as shown by such meters and at the rates then
charged by the furnishing public utility); and any additional expense incurred
by Landlord in keeping account of electric current, gas, or water so consumed
shall be paid by Tenant, and Tenant agrees to pay Landlord therefor promptly
upon demand by Landlord. The gas and electric meters directly servicing the
Building at 1855 South Grant Street shall be placed in Tenant's own name and
account, and Tenant shall pay directly to the providing public utilities the
cost of the gas and electric associated solely with the Building at 1855 South
Grant Street. This paragraph continues below.

12. TAXES

         A. As Additional Rent and in accordance with Paragraph 4 D of this
Lease, Tenant shall pay to Landlord Tenant's proportionate share of all Real
Property Taxes, which prorata share shall be allocated to the leased Premises by
square footage or other equitable basis, as calculated by Landlord. The term
"Real Property Taxes," as used herein, shall mean (i) all taxes, assessments,
levies and other charges of any kind or nature whatsoever, general and special,
foreseen and unforeseen (including all installments of principal and interest
required to pay any general or special assessments for public improvements and
any increases resulting from reassessments caused by any change in ownership of
the Complex) now or hereafter imposed by any governmental or quasi-governmental
authority or special district having the direct or indirect power to tax or levy
assessments, which are levied or assessed against, or with respect to the value,
occupancy or use of, all or any portion of the Complex (as now constructed or as
may at any time hereafter be constructed, altered, or otherwise changed) or
Landlord's interest therein: any improvements located within the Complex
(regardless of ownership); the fixtures, equipment and other property of
Landlord, real or personal, that are an integral part of and located in the
Complex; or parking areas, public utilities, or energy within the Complex; (ii)
all charges, levies or fees imposed by reason of environmental regulation or
other governmental control of the Complex; and (iii) all costs and fees
(including attorneys' fees) incurred by Landlord in contesting any Real Property
Tax and in negotiating with public authorities as to any Real Property Tax. If
at any time during the term of this Lease the taxation or assessment of the
Complex prevailing as of the 

                                      -9-
   10
commencement date of this Lease shall be altered so that in lieu of or in
addition to any Real Property Tax described above there shall be levied,
assessed or imposed (whether by reason of a change in the method of taxation or
assessment, creation of a new tax or charge, or any other cause) an alternate or
additional tax or charge (i) on the value, use or occupancy of the Complex or
Landlord's interest therein or (ii) on or measured by the gross receipts, income
or rentals from the Complex, on Landlord's business of leasing the Complex, or
computed in any manner with respect to the operation of the Complex, then any
such tax or charge, however designated, shall be included within the meaning of
the term "Real Property Taxes" for purposes of this Lease. If any Real Property
Tax is based upon property or rents unrelated to the Complex, then only that
part of such Real Property Tax that is fairly allocable to the Complex shall be
included within the meaning of the term "Real Property Taxes". Notwithstanding
the foregoing, the term "Real Property Taxes" shall not include estate,
inheritance, gift or franchise taxes of Landlord or the federal or state net
income tax imposed on Landlord's income from all sources.

         B.   Taxes on Tenant's Property

              (1) Tenant shall be liable for and shall pay ten days before
delinquency, taxes levied against any personal property or trade fixtures placed
by Tenant in or about the Premises. If any such taxes on Tenant's personal
property or trade fixtures are levied against Landlord or Landlord's property or
if the assessed value of the Premises is increased by the inclusion therein of a
value placed upon such personal property or trade fixtures of Tenant and if
Landlord, after written notice to Tenant, pays the taxes based on such increased
assessment, which Landlord shall have the right to do regardless of the validity
thereof, but only under proper protest if requested by Tenant, Tenant shall upon
demand, as the case may be, repay to Landlord the taxes so levied against
Landlord, or the proportion of such taxes resulting from such increase in the
assessment; provided that in any such event Tenant shall have the right, in the
name of Landlord and with Landlord's full cooperation, to bring suit in any
court of competent jurisdiction to recover the amount of any such taxes so paid
under protest, and any amount so recovered shall belong to Tenant.

              (2) If the Tenant improvements in the Premises, whether installed,
and/or paid for by Landlord or Tenant and whether or not affixed to the real
property so as to become a part thereof, are assessed for Real Property Tax
purposes at a valuation higher than the valuation at which standard office
improvements in other space in the Complex are assessed, then the Real Property
Taxes and assessments levied against Landlord or the Complex by reason of such
excess assessed valuation shall be deemed to be taxes levied against personal
property of Tenant and shall be governed by the provisions of 12A(i), above. If
the records of the County Assessor are available and sufficiently detailed to
serve as a basis for determining whether said Tenant improvements are assessed
at a higher valuation than standard office improvements in other space in the
Complex, such records shall be binding on both the Landlord and the Tenant. If
the records of the County Assessor are not available or sufficiently detailed to
serve as a basis for making said determination, the actual cost of construction
shall be used.

13. LIABILITY INSURANCE   Tenant, at Tenant's expense, agrees to keep in force
during the term of this Lease a policy of comprehensive public liability
insurance with limits in the amount of $1,000,000/$1,000,000 for injuries to or
death of persons occurring in, on or about the Premises or the Complex, and
property damage insurance with limits of $500,000. The policy or policies
affecting such insurance, certificates of which shall be furnished to Landlord,
shall name Landlord as additional insureds, and shall insure any liability of
Landlord, contingent or otherwise, as respects acts or omissions of Tenant, its
agents, employees or invitees or otherwise by any conduct or transactions of any
of said persons in or about or concerning the Premises, including

                                      -10-
   11
any failure of Tenant to observe or perform any of its obligations hereunder;
shall be issued by an insurance company admitted to transact business in the
State of California; and shall provide that the insurance effected thereby shall
not be canceled, except upon thirty (30) days' prior written notice to Landlord.
If, during the term of this Lease, in the considered opinion of Landlord's
Lender, insurance advisor or counsel, the amount of insurance described in this
paragraph 13 is not adequate, Tenant agrees to increase said coverage to such
reasonable amount as Landlord's Lender, insurance advisor or counsel shall deem
adequate.

14. TENANT'S PERSONAL PROPERTY INSURANCE AND WORKER'S COMPENSATION INSURANCE
Tenant shall maintain a policy or policies of fire and property damage insurance
in "all risk" form with a sprinkler leakage endorsement ensuring the personal
property, inventory, trade fixtures and leasehold improvements within the leased
Premises for the full replacement value thereof. The proceeds from any of such
policies shall be used for the repair or replacement of such items so insured.

         Tenant shall also maintain a policy or policies of worker's
compensation insurance and any other employee benefit insurance sufficient to
comply with all laws.

15. PROPERTY INSURANCE   Landlord shall purchase and keep in force and, as
Additional Rent and in accordance with Paragraph 4D of this Lease, Tenant shall
pay to Landlord Tenant's proportionate share (calculated on a square footage or
other equitable basis as calculated by Landlord) of the cost of policy or
policies of insurance covering loss or damage to the Premises and Complex in the
amount of the full replacement value thereof, providing protection against those
perils included within the classification of "all risks" insurance and flood
and/or earthquake insurance, if available, plus a policy of rental income
insurance in the amount of one hundred (100%) percent of twelve (12) months
Basic Rent, plus sums paid as Additional Rent. If such insurance cost is
increased due to Tenant's use of the Premises or the Complex, Tenant agrees to
pay to Landlord the full cost of such increase. Tenant shall have no interest in
nor any right to the proceeds of any insurance procured by Landlord for the
Complex.

         Landlord and Tenant do each hereby respectively release the other, to
the extent of insurance coverage of the releasing party, from any liability for
loss or damage caused by fire or any of the extended coverage casualties
included in the releasing party's insurance policies, irrespective of the cause
of such fire or casualty; provided, however, that if the insurance policy of
either releasing party prohibits such waiver, then this waiver shall not take
effect until consent to such waiver is obtained. If such waiver is so
prohibited, the insured party affected shall promptly notify the other party
thereof.

16. INDEMNIFICATION   Landlord shall not be liable to Tenant and Tenant hereby
waives all claims against Landlord for any injury to or death of any person or
damage to or destruction of property in or about the Premises or the Complex by
or from any cause whatsoever, including, without limitation, gas, fire, oil,
electricity or leakage of any character from the roof, walls, basement or other
portion of the Premises or the Complex but excluding, however, the negligence of
Landlord, its agents, servants, employees, invitees, or contractors of which
negligence Landlord has knowledge and reasonable time to correct. Except as to
injury to persons or damage to property the principal cause of which is the
negligence of Landlord, Tenant shall hold Landlord harmless from and defend
Landlord against any and all expenses, including reasonable attorneys' fees, in
connection therewith, arising out of any injury to or death of any person or
damage to or destruction of property occurring, in, on or about the Premises, or
any part thereof, from any cause whatsoever.

                                      -11-
   12
17. COMPLIANCE   Except as may be limited per paragraph 43 (as amended)
Tenant, at its sole cost and expense, shall promptly comply with all laws,
statutes, ordinances and governmental rules, regulations or requirements now or
hereafter in effect; with the requirements of any board of fire underwriters or
other similar body now or hereafter constituted; and with any direction or
occupancy certificate issued pursuant to law by any public officer; provided,
however, that no such failure shall be deemed a breach of the provisions if
Tenant, immediately upon notification, commences to remedy or rectify said
failure. The judgment of any court of competent jurisdiction or the admission of
Tenant in any action against Tenant, whether Landlord be a party thereto or not,
that Tenant has violated any such law, statute, ordinance or governmental rule,
regulation. requirement, direction or provision, shall be conclusive of that
fact as between Landlord and Tenant. This paragraph shall not be interpreted as
requiring Tenant to make structural changes or improvements, except to the
extent such changes or improvements are required as a result of Tenant's use of
the Premises. Tenant shall, at its 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 the Premises. This paragraph is continued below.

18. LIENS   Tenant shall keep the Premises and the Complex free from any liens
arising out of any work performed, materials furnished or obligation incurred by
Tenant. In the event that Tenant shall not, within ten (10) days following the
imposition of such lien, cause the same to be released of record, Landlord shall
have, in addition to all other remedies provided herein and by law, the right,
but no obligation, to cause the same to be released by such means as it shall
deem proper, including payment of the claim giving rise to such lien. All sums
paid by Landlord for such purpose, and all expenses incurred by it in connection
therewith, shall be payable to Landlord by Tenant on demand with interest at the
prime rate of interest as quoted by the Bank of America.

19. ASSIGNMENT AND SUBLETTING   Tenant shall not assign, transfer or hypothecate
the leasehold estate under this Lease, or any interest therein. and shall not
sublet the Premises, or any part thereof, or any right or privilege appurtenant
thereto, or suffer any other person or entity to occupy or use the Premises, or
any portion thereof, without, in each case, the prior written consent of
Landlord which consent will not be unreasonably withheld or delayed. Tenant
agrees to pay to Landlord, as additional rent, 50% of all rents or additional
consideration excluding any consideration for use of Tenant's personal property
such as furniture, telephones, etc. received by Tenant from its assignees,
transferees or subtenants in excess of the rent payable by Tenant to Landlord
hereunder. Tenant shall, by one hundred twenty (120) days' written notice,
advise Landlord of its intent to assign or transfer Tenant's interest in the
Lease or sublet the Premises or any portion thereof for any part of the term
hereof. In the event Tenant is allowed to assign, transfer or sublet the whole
or any part of the Premises, with the prior written consent of Landlord, no
assignee, transferee or subtenant shall assign or transfer this Lease, either in
whole or in part, or sublet the whole or any part of the Premises, without also
having obtained the prior written consent of Landlord. A consent of Landlord to
one assignment, transfer, hypothecation, subletting, occupation or use by any
other person shall not release Tenant from any of Tenant's obligations hereunder
or be deemed to be a consent to any subsequent similar or dissimilar assignment,
transfer, hypothecation, subletting, occupation or use by any other person. Any
such assignment, transfer, hypothecation, subletting, occupation or use without
such consent shall be void and shall constitute a breach of this Lease by Tenant
and shall, at the option of Landlord exercised by written notice to Tenant,
terminate this Lease. The leasehold estate under this Lease shall not, nor shall
any interest therein, be assignable for any purpose by operation of law without
the written consent of Landlord. As a condition to its consent, Landlord may
require Tenant to pay all expenses in connection with the assignment and
Landlord may require Tenant's assignee or transferee (or other assignees or

                                      -12-
   13
transferees) to assume in writing all of the obligations under this Lease and
for Tenant to remain liable to Landlord under the Lease. This paragraph is
continued below.

20. SUBORDINATION AND MORTGAGES   In the event Landlord's title or leasehold
interest is now or hereafter encumbered by a deed of trust, upon the interest of
Landlord in the land and buildings in which the demised Premises are located, to
secure a loan from a lender (hereinafter referred to as "Lender") to Landlord,
Tenant shall, at the request of Landlord or Lender, execute in writing an
agreement subordinating its rights under this Lease to the lien of such deed of
trust, or, if so requested, agreeing that the lien of Lender's deed of trust
shall be or remain subject and subordinate to the rights of Tenant under this
Lease. Tenant hereby irrevocably appoints Landlord the attorney in fact of
Tenant to execute, deliver and record any such instrument or instruments for
and in the name and on behalf of Tenant. Notwithstanding any such subordination,
Tenant's possession under this Lease shall not be disturbed if Tenant is not in
default and so long as Tenant shall pay all rent and observe and perform all of
the provisions set forth in this Lease. Tenant agrees to send to any mortgagees
and/or deed of trust holders, by registered mail, a copy of any notice of
default served by Tenant upon the Landlord, provided that prior to such notice,
Tenant has been notified, in writing (by way of notice of assignment of rents or
otherwise) of the addresses of such mortgagees and/or deed of trust holders.
Tenant further agrees that if Landlord shall have failed to cure such default
within the time provided for in this Lease, any such mortgagees and/or deed of
trust holders shall have an additional thirty (30) days within which to cure
such default, or if such default is not reasonably susceptible of cure within
that time, then such additional time as may be reasonably necessary if within
such (30) days, any mortgagee and/or deed of trust holder has commenced and is
diligently pursuing the remedies necessary to cure such default, (including but
not limited to commencement of foreclosure proceedings), in which event this
Lease shall not be terminated when such remedies are being diligently pursued.
This paragraph is continued below.

21. ENTRY BY LANDLORD   Except in the case of an emergency, upon 2 hours
advanced notice Landlord reserves, and shall at all reasonable times have, the
right to enter the Premises to inspect them; to perform any services to be
provided by Landlord hereunder; to submit the Premises to prospective
purchasers, mortgagers or tenants; to post notices of nonresponsibility; and to
alter, improve or repair the Premises and any portion of the Complex, all
without abatement of rent; and may erect scaffolding and other necessary
structures in or through the Premises where reasonably required by the character
of the work to be performed; provided, however, that the business of Tenant
shall be interfered with to the least extent that is reasonably practical. For
each of the foregoing purposes, Landlord shall at all times have and retain a
key with which to unlock all of the doors in an emergency in order to obtain
entry to the Premises, and any entry to the Premises obtained by Landlord by any
of said means, or otherwise, shall not under any circumstances be construed or
deemed to be a forcible or unlawful entry into or a detainer of the Premises or
an eviction, actual or constructive, of Tenant from the Premises or any portion
thereof. Landlord shall also have the right at any time to change the
arrangement or location of entrances or passageways, doors and doorways, and
corridors, elevators, stairs, toilets or other public parts of the Complex and
to change the name, number or designation by which the Complex is commonly
known. and none of the foregoing shall be deemed an actual or constructive
eviction of Tenant, or shall entitle Tenant to any reduction of rent hereunder.

22. BANKRUPTCY AND DEFAULT   The commencement of a bankruptcy action or
liquidation action or reorganization action or insolvency action or an
assignment of or by Tenant for the benefit of creditors, or any similar action
undertaken by Tenant, or the insolvency of Tenant, shall, at Landlord's option,
constitute a breach of this Lease by Tenant. If the trustee or

                                      -13-
   14
receiver appointed to serve during a bankruptcy, liquidation, reorganization,
insolvency or similar action elects to reject Tenant's unexpired Lease, the
trustee or receiver shall notify Landlord in writing of its election within
thirty (30) days after an order for relief in a liquidation action or within
thirty (30) days after the commencement of any action.

         Within thirty (30) days after court approval of the assumption of the
Lease, the trustee or receiver shall cure (or provide adequate assurance to the
reasonable satisfaction of Landlord that the trustee or receiver shall cure) any
and all previous defaults under the unexpired Lease and shall compensate
Landlord for all actual pecuniary loss and shall provide adequate assurance of
future performance under said Lease to the reasonable satisfaction of Landlord.
Adequate assurance of future performance, as used herein, includes, but shall
not be limited to: (i) assurance of source and payment of rent, and other
consideration due under this Lease; (ii) assurance that the assumption or
assignment of this Lease will not breach substantially any provision, such as
radius, location, use, or exclusivity provision, in any agreement relating to
the above described Premises.

         Nothing contained in this section shall affect the existing right of
Landlord to refuse to accept an assignment upon commencement of or in connection
with a bankruptcy, liquidation, reorganization or insolvency action or an
assignment of Tenant for the benefit of creditors or other similar act. Nothing
contained in this Lease shall be construed as giving or granting or creating an
equity in the demised Premises to Tenant. In no event shall the leasehold estate
under this Lease, or any interest therein, be assigned by voluntary or
involuntary bankruptcy proceeding without the prior written consent of Landlord.
In no event shall this Lease or any rights or privileges hereunder be an asset
of Tenant under any bankruptcy, insolvency or reorganization proceedings.

         The failure to perform or honor any covenant, condition or
representation made under this Lease shall constitute a default hereunder by
Tenant upon expiration of the appropriate grace period hereinafter provided.
Tenant shall have a period of five (5) days from the date of written notice from
Landlord within which to cure any default in the payment of rental or adjustment
thereto. Tenant shall have a period of ten (10) days from the date of written
notice from Landlord within which to cure or commence to cure any other default
under this Lease and shall not be in default as long as Tenant diligently
proceeds to cure the non-monetary default. Upon an uncured default of this Lease
by Tenant, Landlord shall have the following rights and remedies in addition to
any other rights or remedies available to Landlord at law or in equity:

         (a) The rights and remedies provided for by California Civil Code
Section 1951.2, including but not limited to, recovery of the worth at the time
of award of the amount by which the unpaid rent for the balance of the term
after the time of award exceeds the amount of rental loss for the same period
that Tenant proves could be reasonably avoided, as computed pursuant to
subsection (b) of said Section 1951.2. Any proof by Tenant under subparagraphs
(2) and (3) of Section 1951.2 of the California Civil Code of the amount of
rental loss that could be reasonably avoided shall be made in the following
manner: Landlord and Tenant shall each select a licensed real estate broker in
the business of renting property of the same type and use as the Premises and in
the same geographic vicinity. Such two real estate brokers shall select a third
licensed real estate broker, and three licensed real estate brokers so selected
shall determine the amount of the rental loss that could be reasonably avoided
from the balance of the term of this Lease after the time of award. The decision
of the majority of said licensed real estate brokers shall be final and binding
upon the parties hereto.

         (b) The rights and remedies provided by California Civil Code which
allows Landlord to continue the Lease in effect and to enforce all of its rights
and remedies under this Lease, including the right to recover rent as it becomes
due, for so long as Landlord does not terminate Tenant's right to possession;
acts of maintenance or preservation, efforts to relet the Premises, or the
appointment of a receiver upon Landlord's initiative to protect its interest
under this Lease shall not constitute a termination of Tenant's right to
possession.

                                      -14-
   15
         (c) The right to terminate this Lease by giving notice to Tenant in
accordance with applicable law.

         (d) The right and power, as attorney-in-fact for Tenant, to enter the
Premises and remove therefrom all persons and property, to store such property
in a public warehouse or elsewhere at the cost of and for the account of Tenant
and to sell such property and apply such proceeds therefrom pursuant to
applicable California law. Landlord, as attorney-in-fact for Tenant, may from
time to time sublet the Premises or any part thereof for such term or terms
(which may extend beyond the term of this Lease) and at such rent and such other
terms as Landlord in its sole discretion may deem advisable, with the right to
make alteration and repairs to the Premises. Upon each subletting, (i) Tenant
shall be immediately liable to pay Landlord, in addition to indebtedness other
than rent due hereunder, the cost of such subletting, including, but not limited
to, reasonable attorneys' fees, and any real estate commissions actually paid,
and the cost of such alterations and repairs incurred by Landlord and the
amount, if any, by which the rent hereunder for the period of such subletting
(to the extent such period does not exceed the term hereof, exceeds the amount
to be paid as rent for the Premises for such period or (ii) at the option of
Landlord, rents received from such subletting shall be applied first to payment
of indebtedness other than rent due hereunder from Tenant to Landlord; second,
to the payment of any costs of such subletting and of such alterations and
repairs; third to payment of rent due to unpaid hereunder; and the residue, if
any, shall be held by Landlord and applied in payment of future rent as the same
becomes due hereunder. If Tenant has been credited with any rent to be received
by such subletting under option (i) and such rent shall not be promptly paid to
Landlord by the subtenant(s), or if such rentals received from such subletting
under option (ii) during any month be less than that to be paid during that
month by Tenant hereunder, Tenant shall pay any such deficiency to Landlord.
Such deficiency shall be calculated and paid monthly. For all purposes set forth
in this subparagraph (d), Landlord is hereby irrevocably appointed
attorney-in-fact for Tenant, with power of substitution. No taking possession of
the Premises by Landlord, as attorney-in-fact for Tenant, shall be construed as
an election on its part to terminate this Lease unless a written notice of such
intention be given to Tenant. Notwithstanding any such subletting without
termination, Landlord may at any time hereafter elect to terminate this Lease
for such previous breach.

         (e) The right to have a receiver appointed for Tenant upon application
by Landlord, to take possession of the Premises and to apply any rental
collected from the Premises and to exercise all other rights and remedies
granted to Landlord as attorney-in-fact for Tenant pursuant to subparagraph (d)
above.

23. ABANDONMENT   Tenant shall not vacate or abandon the Premises at any time
during the term of this Lease; and if Tenant shall abandon, vacate or surrender
said Premises, or be dispossessed by the process of law, or otherwise, any
personal property belonging to Tenant and left on the Premises shall be deemed
to be abandoned, at the option of Landlord, except such property as may be
mortgaged to Landlord.

24. DESTRUCTION   In the event the Premises are destroyed in whole or in part
from any cause, Landlord may, at its option:

         (a) Rebuild or restore the Premises to their condition prior to the
damage or destruction, or

         (b) Terminate this Lease.

         If Landlord does not give Tenant notice in writing within thirty (30)
days from the destruction of the Premises of its election to either rebuild and
restore them, or to terminate this Lease, Landlord shall be deemed to have
elected to rebuild or restore them, in which event

                                      -15-
   16
Landlord agrees, at its expense, promptly to rebuild or restore the Premises to
their condition prior to the damage or destruction. Tenant shall be entitled to
a reduction in rent while such repair is being made in the proportion that the
area of the Premises rendered untenantable by such damage bears to the total
area of the Premises. If Landlord does not complete the rebuilding or
restoration within one hundred eighty (180) days following the date of
destruction (such period of time to be extended for delays caused by the fault
or neglect of Tenant or because of Acts of God, acts of public agencies, labor
disputes, strikes, fires, freight embargoes, rainy or stormy weather, inability
to obtain materials, supplies or fuels, acts of contractors or subcontractors,
or delay of the contractors or subcontractors due to such causes or other
contingencies beyond the control of Landlord), then Tenant shall have the right
to terminate this Lease by giving fifteen (15) days prior written notice to
Landlord. Notwithstanding anything herein to the contrary, Landlord's obligation
to rebuild or restore shall be limited to the building and interior improvements
constructed by Landlord as they existed as of the commencement date of the Lease
and shall not include restoration of Tenant's trade fixtures, equipment,
merchandise or any improvements, alterations or additions made by Tenant to the
Premises, which Tenant shall forthwith replace or fully repair at Tenant's sole
cost and expense provided this Lease is not cancelled according to the
provisions above.

         Unless this Lease is terminated pursuant to the foregoing provisions,
this Lease shall remain in full force and effect. Tenant hereby expressly waives
the provisions of Section 1932, Subdivision 2, and Section 1933, Subdivision 4
of the California Civil Code.

         In the event that the building in which the Premises are situated is
damaged or destroyed to the extent of not less than 33 1/3% of the replacement
cost thereof, Landlord may elect to terminate this Lease, whether the Premises
be injured or not. In the event the destruction of the Premises is caused by
Tenant, Tenant shall pay the deductible portion of Landlord's insurance
proceeds.

25. EMINENT DOMAIN   If all or any part of the Premises shall be taken by any
public or quasi-public authority under the power of eminent domain or conveyance
in lieu thereof, this Lease shall terminate as to any portion of the Premises so
taken or conveyed on the date when title vests in the condemnor, and Landlord
shall be entitled to any and all payment, income, rent, award or any interest
therein whatsoever which may be paid or made in connection with such taking or
conveyance, and Tenant shall have no claim against Landlord or otherwise for the
value of any unexpired term of this Lease. Notwithstanding the foregoing
paragraph, any compensation specifically awarded Tenant for loss of business,
Tenant's personal property, moving cost or loss of goodwill, shall be and remain
the property of Tenant.

         If (i) any action or proceeding is commenced for such taking of the
Premises or any part thereof, or if Landlord is advised in writing by any entity
or body having the right or power of condemnation of its intention to condemn
the Premises or any portion thereof, or (ii) any of the foregoing events occur
with respect to the taking of any space in the Complex not leased hereby, or if
any such spaces so taken or conveyed in lieu of such taking and Landlord shall
decide to discontinue the use and operation of the Complex, or decide to
demolish, alter or rebuild the Complex, then, in any of such events Landlord
shall have the right to terminate this Lease by giving Tenant written notice
thereof within sixty (60) days of the date of receipt of said written advice, or
commencement of said action or proceeding, or taking conveyance, which
termination shall take place as of the first to occur of the last day of the
calendar month next following the month in which such notice is given or the
date on which title to the Premises shall vest in the condemnor.

         In the event of such a partial taking or conveyance of the Premises, if
the portion of the Premises taken or conveyed is so substantial that the Tenant
can no longer reasonably conduct its

                                      -16-
   17
business. Tenant shall have the privilege of terminating this Lease within sixty
(60) days from the date of such taking or conveyance, upon written notice to
Landlord of its intention so to do, and upon giving of such notice this Lease
shall terminate on the last day of the calendar month next following the month
in which such notice is given, upon payment by Tenant of the rent from the date
of such taking or conveyance to the date of termination.

         If a portion of the Premises be taken by condemnation or conveyance in
lieu thereof and neither Landlord nor Tenant shall terminate this Lease as
provided herein, this Lease shall continue in full force and effect as to the
part of the Premises not so taken or conveyed, and the rent herein shall be
apportioned as of the date of such taking or conveyance so that thereafter the
rent to be paid by Tenant shall be in the ratio that the area of the portion of
the Premises not so taken or conveyed bears to the total area of the Premises
prior to such taking.

26. SALE OR CONVEYANCE BY LANDLORD   In the event of a sale or conveyance of the
Complex or any interest therein, by any owner of the reversion then constituting
Landlord, the transferor shall thereby be released from any further liability
upon any of the terms, covenants or conditions (express or implied) herein
contained in favor of Tenant, and in such event, insofar as such transfer is
concerned, Tenant agrees to look solely to the responsibility of the successor
in interest of such transferor in and to the Complex and this Lease. This Lease
shall not be affected by any such sale or conveyance, and Tenant agrees to
attorn to the successor in interest of such transferor.

27. ATTORNMENT TO LENDER OR THIRD PARTY   In the event the interest of Landlord
in the land and buildings in which the leased Premises are located (whether such
interest of Landlord is a fee title interest or a leasehold interest) is
encumbered by deed of trust, and such interest is acquired by the lender or any
third party through judicial foreclosure or by exercise of a power of sale at
private trustee's foreclosure sale, Tenant hereby agrees to attorn to the
purchaser at any such foreclosure sale and to recognize such purchaser as the
Landlord under this Lease. In the event the lien of the deed of trust securing
the loan from a Lender to Landlord is prior and paramount to the lease, this
Lease shall nonetheless continue in full force and effect for the remainder of
the unexpired term hereof, at the same rental herein reserved and upon all the
other terms, conditions and covenants herein contained.

28. HOLDING OVER   Any holding over by Tenant after expiration or other
termination of the term of this Lease with the written consent of Landlord
delivered to Tenant shall not constitute a renewal or extension of the Lease or
give Tenant any rights in or to the leased Premises except as expressly provided
in this Lease Any holding over after the expiration or other termination of the
term of this lease, with the consent of Landlord, shall be construed to be a
tenancy from month to month, on the same terms and conditions herein specified
insofar as applicable except that the monthly Basic Rent shall be increased to
an amount equal to two hundred (150%) percent of the monthly Basic Rent required
during the last month of the Lease term.

29. CERTIFICATE OF ESTOPPEL   Tenant shall at any time upon not less than ten
(10) days' prior written notice from Landlord execute, acknowledge and deliver
to Landlord a statement in writing (i) certifying that this Lease is unmodified
and in full force and effect (or, if modified, stating the nature of such
modification and certifying that this Lease, as so modified, is in full force
and effect) and the date to which the rent and other charges are paid in
advance, if any, and (ii) acknowledging that there are not, to Tenant's
knowledge, any uncured defaults on the part of Landlord hereunder, or specifying
such defaults, if any, are claimed. Any such statement may be conclusively
relied upon by any prospective purchaser or encumbrancer of the Premises.
Tenant's

                                      -17-
   18
failure to deliver such statement within such time shall be conclusive upon
Tenant that this Lease is in full force and effect, without modification except
as may be represented by Landlord; that there are no uncured defaults in
Landlord's performance, and that not more than one month's rent has been paid in
advance.

30. CONSTRUCTION CHANGES   It is understood that the description of the Premises
and the location of ductwork, plumbing and other facilities therein are subject
to such minor changes as Landlord or Landlord's architect determines to be
desirable in the course of construction of the Premises, and no such changes, or
any changes in plans for any other portion of the Complex shall affect this
Lease or entitle Tenant to any reduction of rent hereunder or result in any
liability of Landlord to Tenant. Landlord does not guarantee the accuracy of any
drawings supplied to Tenant and verification of the accuracy of such drawings
rests with Tenant.

31. RIGHT OF LANDLORD TO PERFORM   All terms, covenants and conditions of this
Lease to be performed or observed by Tenant shall be performed or observed by
Tenant at Tenant's sole cost and expense and without any reduction of rent. If
Tenant shall fail to pay any sum of money, or other rent, required to be paid by
it hereunder or shall fail to perform any other term or covenant hereunder on
its part to be performed, and such failure shall continue for five (5) days
after written notice thereof by Landlord, Landlord, without waiving or releasing
Tenant from any obligation of Tenant hereunder, may, but shall not be obligated
to, make any such payment or perform any such other term or covenant on Tenant's
part to be performed. All sums so paid by Landlord and all necessary costs of
such performance by Landlord together with interest thereon at the rate of the
prime rate of interest per annum as quoted by the Bank of America from the date
of such payment of performance by Landlord, shall be paid (and Tenant covenants
to make such payment) to Landlord on demand by Landlord, and Landlord shall have
(in addition to any other right or remedy of Landlord) the same rights and
remedies in the event of nonpayment by Tenant as in the case of failure by
Tenant in the payment of rent hereunder.

32. ATTORNEYS' FEES

         (A) In the event that Landlord should bring suit for the possession of
the Premises, for the recovery of any sum due under this Lease, or because of
the breach of any provision of this Lease, or for any other relief against
Tenant hereunder, then all costs and expenses, including reasonable attorneys'
fees, incurred by the prevailing party therein shall be paid by the other party,
which obligation on the part of the other party shall be deemed to have accrued
on the date of the commencement of such action and shall be enforceable whether
or not the action is prosecuted to judgement.

         (B) Should Landlord be named as a defendant in any suit brought against
Tenant in connection with or arising out of Tenant's occupancy hereunder, Tenant
shall pay to Landlord its costs and expenses incurred in such suit, including a
reasonable attorney's fee.

33. WAIVER   The waiver by either party of the other party's failure to perform
or observe any term, covenant or condition herein contained to be performed or
observed by such waiving party shall not be deemed to be a waiver of such term,
covenant or condition or of any subsequent failure of the party failing to
perform or observe the same or any other such term, covenant or condition
therein contained, and no custom or practice which may develop between the
parties hereto during the term hereof shall be deemed a waiver of, or in any way
affect, the right of either party to insist upon performance and observance by
the other party in strict accordance with the terms hereof.

                                      -18-
   19
34. NOTICES   All notices, demands, requests, advices or designations which may
be or are required to be given by either party to the other hereunder shall be
in writing. All notices, demands, requests, advices or designations by Landlord
to Tenant shall be sufficiently given, made or delivered if personally served on
Tenant by leaving the same at the Premises or if sent by United States certified
or registered mail, postage prepaid, addressed to Tenant at the Premises:
Attention: Chief Financial Officer with a copy to V.P. Legal Affairs. All
notices, demands, requests, advices or designations by Tenant to Landlord shall
be sent by United States certified or registered mail, postage prepaid.
addressed to Landlord at its offices at 3201 Ash Street, Palo Alto, CA 94306.
Each notice, request, demand, advice or designation referred to in this
paragraph shall be deemed received on the date of the personal service or
mailing thereof in the manner herein provided, as the case may be.

35. EXAMINATION OF LEASE   Submission of this instrument for examination or
signature by Tenant does not constitute a reservation of or option for a lease,
and this instrument is not effective as a lease or otherwise until its execution
and delivery by both Landlord and Tenant. Landlord and Tenant mutually intend
that neither shall have any binding contractual obligations to the other with
respect to the matters referred to herein unless and until this instrument has
been fully executed by both parties.

36. DEFAULT BY LANDLORD   Landlord shall not be in default unless Landlord fails
to perform obligations required of Landlord within a reasonable time, but in no
event earlier than thirty (30) days after written notice by Tenant to Landlord
and to the holder of any first mortgage or deed of trust covering the Premises
whose name and address shall have heretofore been furnished to Tenant in
writing, specifying wherein Landlord has failed to perform such obligations;
provided, however, that if the nature of Landlord's obligations is such that
more than thirty (30) days are required for performance, then Landlord shall not
be in default if Landlord commences performance within such thirty (30) day
period and thereafter diligently prosecutes the same to completion.

37. CORPORATE AUTHORITY   If Tenant is a corporation (or a partnership) each
individual executing this Lease on behalf of said corporation (or partnership)
represents and warrants that he is duly authorized to execute and deliver this
Lease on behalf of said corporation (or partnership) in accordance with the
by-laws of said corporation (or partnership in accordance with the partnership
agreement) and that this Lease is binding upon said corporation (or partnership)
in accordance with its terms. If Tenant is a corporation, Tenant shall, within
thirty (30) days after execution of this Lease, deliver to Landlord a certified
copy of the resolution of the Board of Directors of said corporation authorizing
or ratifying the execution of this Lease.

38. BASIC RENT ADJUSTMENT   It is understood that on each and every anniversary
of the date Tenant takes possession, the Basic Rent provided for in Paragraph 4
A of the Lease shall be adjusted in accordance with the following formula based
on the Consumer Price Index ("CPI") for all urban Consumers, subgroup "All
Items," San Francisco-Oakland, California Metropolitan Area (1967 = 100)
published by the Bureau of Labor Statistics, U.S. Department of Labor (the
"Index") published nearest the date Tenant taken possession of the Premises (the
"Beginning Index") and the Index which is published nearest but prior to each
and every anniversary of the date on which Tenant takes possession of the
Premises (the "Adjustment Index"). The "CPI" adjusted Basic Rent shall be
calculated by multiplying the Basic Rent provided for in Paragraph 4 A of the
Lease by a fraction, the numerator of which is the Adjustment Index and the
denominator of which is the Beginning Index. In no event, however, shall the
"CPI" adjusted Basic Rent

                                      -19-
   20
decrease below the Basic Rent provided for in Paragraph 4A of the Lease or any
subsequent adjustment thereof. If the Index is changed so that the Base Year of
the Index differs from that used as of the month immediately preceding the month
in which the term commences, the Index shall be convened in accordance with the
conversion factor published by the United States Department of Labor, Bureau of
Labor Statistics. If the Index is discontinued or revised during the term, such
other government index or other computation with which it is replaced shall be
used in order to obtain substantially the same result as would be obtained if
the Index had not been discontinued or revised. In no event shall the annual
adjustment exceed 6% for any given year to year adjustment. If the CPI exceeds
6% for any given annual period, the increase for the subsequent 12 month period
shall be 6%.


39. LIMITATION OF LIABILITY   In consideration of the benefits accruing
hereunder, Tenant and all successors and assigns covenant and agree that, in the
event of any actual or alleged failure, breach or default hereunder by Landlord:

(i)     the sole and exclusive remedy shall be against Landlord and Landlord's
        assets;

(ii)    no partner of Landlord shall be sued or named as a party in any suit or
        action (except as may be necessary to secure jurisdiction of the
        partnership);

(iii)   no service of process shall be made against any partner of Landlord
        (except as may be necessary to secure jurisdiction of the partnership);

(iv)    no partner of Landlord shall be required to answer or otherwise plead to
        any service of process;

(v)     no judgment shall be taken against any partner of Landlord;

(vi)    any judgment taken against any partner of Landlord may be vacated and
        set aside at any time without hearing;

(vii)   no writ of execution will ever be levied against the assets of any
        partner of Landlord;

(viii)  these covenants and agreements are enforceable both by Landlord and also
        by any partner of Landlord.

(ix)    The term "Landlord," as used in this section, shall mean only the owner
        or owners from time to time of the fee title or the tenant's interest
        under a ground lease of the land described in Exhibit "B," and in the
        event of any transfer of such title or interest, Landlord herein named
        (and in case of any subsequent transfers the then grantor) shall be
        relieved from and after the date of such transfer of all liability as
        respects Landlord's obligations thereafter to be performed, provided
        that any funds in the hands of Landlord or the then grantor at the time
        of such transfer in which Tenant has an interest shall be delivered to
        the grantee. Similarly, the obligations contained in this Lease to be
        performed by Landlord shall be binding on Landlord's successors and
        assigns only during their respective periods of ownership. Tenant agrees
        that each of the foregoing covenants and agreements shall be applicable
        to any covenant or agreement either expressly contained in this Lease or
        imposed by statute or at common law.

40. BROKERS   Tenant warrants that it had dealing with only the following real
estate brokers or agents in connection with the negotiation of this Lease:
CB Commercial Real Estate Group and Cornish & Carey and that it knows of no 
other real estate broker or agent who is entitled to a commission in 
connection with this Lease.

41. SIGNS   No sign, placard, picture, advertisement, name or notice shall be
inscribed, displayed, printed or affixed on or to any part of the outside of the
Premises or any exterior windows of the Premises without the written consent of
Landlord first had and obtained and Landlord shall have the right to remove any
such sign, placard, picture, advertisement, name or notice without notice to and
at the expense of Tenant. If Tenant is allowed to print or affix or in

                                      -20-
   21
any way place a sign in, on, or about the Premises, then upon expiration or
other sooner termination of this Lease, Tenant at Tenant's sole cost and expense
shall both remove such sign and repair all damage in such a manner as to restore
all aspects of the appearance of the Premises to the condition prior to the
placement of said sign.

         All approved signs or lettering on outside doors shall be printed,
painted, affixed or inscribed at the expense of Tenant by a person approved of
by Landlord.

         Tenant shall not place anything or allow anything to be placed near the
glass of any window, door partition or wall which may appear unsightly from
outside the Premises. This Paragraph 41 continues below.

42. FINANCIAL STATEMENTS   In the event Tenant tenders to Landlord any
information on the financial stability, creditworthiness or ability of the
Tenant to pay the rent due and owing under the Lease, then Landlord shall be
entitled to rely upon the information provided in determining whether or not to
enter into this Lease Agreement with Tenant and Tenant hereby represents and
warrants to Landlord the following: (i) That all documents provided by Tenant to
Landlord are true and correct copies of the original; and (ii) Tenant has not
withheld any information from Landlord which is material to Tenant's
creditworthiness, financial condition or ability to pay the rent; and (iii) all
information supplied by Tenant to Landlord is true, correct and accurate; and
(iv) no part of the information supplied by Tenant to Landlord contains
misleading or fraudulent statements.

         A default under this paragraph shall be a non curable default on behalf
of Tenant and Landlord shall be entitled to pursue any right or remedy available
to Landlord under the terms of this Lease or available to Landlord under the
laws of the State of California.

43. HAZARDOUS MATERIALS

         A. As used herein, the term "Hazardous Material" shall mean any
substance or material which has been determined by any state, federal or local
governmental authority to be capable of posing a risk of injury to health,
safety or property including all of those materials and substances designated or
defined as "hazardous" or toxic by (i) the Environmental Protection Agency, the
California Water Quality Control Board, the Department of Labor, the California
Department of Industrial Relations, the Department of Transportation, the
Department of Agriculture, the Consumer Product Safety Commission, the
Department of Health and Human Services, the Food and Drug Agency or any other
governmental agency now or hereafter authorized to regulate materials and
substances in the environment, or by (ii) the Comprehensive Environmental
Response, Compensation and Liability Act of 1980, 42 U.S.C. 9601 et seq., as
amended; the Hazardous Materials Transportation Act, 49 U.S.C. 1801, et seq., as
amended; the Resource Conservation and Recovery Act, 42 U.S.C. 6901, et seq., as
amended; the Hazardous Waste Control Law, California Health & Safety Code 25100
et seq., as amended; Sections 66680 through 66685 of Title 22 of the California
Administration Code, Division 4, Chapter 30, as amended; and in the regulations
adopted and publications promulgated pursuant to said laws.

         B. Tenant shall not cause or permit any Hazardous Material to be
improperly or illegally used, stored, discharged, released or disposed of in,
from, under or about the Premises or the Complex, or any other land or
improvements in the vicinity of the Premises or the Complex. Without limiting
the generality of the foregoing, Tenant, at its sole cost, shall comply with all
laws relating to Hazardous Materials. If the presence of Hazardous Materials on
the Premises or the Complex caused or permitted by Tenant results in
contamination of the Premises or the Complex or any soil in or about the
Premises or the Complex, Tenant, at its expense shall promptly take all actions
necessary to return the Premises or the Complex to the condition existing prior
to the appearance of such Hazardous Material. The termination of this Lease
shall not terminate or

                                      -21-
   22
reduce the liability or obligations of Tenant under this Section, or as may be
required by law, to clean up, monitor or remove any Hazardous Materials from the
Premises or the Complex.

         Tenant shall defend, hold harmless and indemnify Landlord and its
agents and employees with respect to all claims, damages and liabilities arising
out of or in connection with any Hazardous Material used, stored, discharged,
released or disposed of in, from, under or about the Premises or the Complex,
where said Hazardous Material is or was attributable to the activities of
Tenant, its agents or contractors during the Lease term and whether or not
Tenant had knowledge of such Hazardous Material, including, without limitation,
any cost of monitoring or removal, any reduction in the fair market value or
fair rental value of the Premises or the Complex and any loss, claim or demand
by any third person or entity relating to bodily injury or damage to real or
personal property.

              Tenant shall not suffer any lien to be recorded against the
Premises or the Complex as a consequence of a Hazardous Material, including any
so called state, federal or local "super fund" lien related to the "clean up" of
a Hazardous Material in or about the Premises, where said Hazardous Material is
or was attributable to the activities of Tenant.

         C. In the event Hazardous Materials are discovered in or about the
Premises or the Complex, and Landlord has substantial reason to believe that
Tenant was responsible for the presence of the Hazardous Material, then Landlord
shall have the right to appoint a consultant, at Tenant's expense, to conduct an
investigation to determine whether Hazardous Materials are located in or about
the Premises or the Complex and to determine the corrective measures, if any,
required to remove such Hazardous Materials. Tenant, at its expense, shall
comply with all recommendations of the consultant, as required by law. To the
extent it is determined that Tenant was not responsible for the presence of the
Hazardous Materials, then Landlord shall reimburse Tenant for any costs incurred
by Landlord and paid by Tenant under the terms of this paragraph 45.C.

         Tenant shall immediately notify Landlord of any inquiry, test,
investigation or enforcement proceeding by or against Tenant or the Premises or
the Complex concerning a Hazardous Material. Tenant acknowledges that Landlord,
as the owner of the Property, at its election, shall have the sole right, at
Tenant's expense, to negotiate, defend, approve and appeal any action taken or
order issued with regard to a Hazardous Material by an applicable governmental
authority. Provided Tenant is not in default under the terms of this Lease,
Tenant shall likewise have the right to participate in any negotiations,
approvals or appeals of any actions taken or orders issued with regard to the
Hazardous Material and Landlord shall not have the right to bind Tenant in said
actions or orders.

         D. It shall not be unreasonable for Landlord to withhold its consent to
any proposed assignment or subletting if (i) the proposed assignee's or
subtenant's anticipated use of the Premises involves the storage, use or
disposal of Hazardous Material; (ii) if the proposed assignee or subtenant has
been required by any prior landlord, lender or governmental authority to "clean
up" Hazardous Material; (iii) if the proposed assignee or subtenant is subject
to investigation or enforcement order or proceeding by any governmental
authority in connection with the use, disposal or storage of a Hazardous
Material.

         E. Tenant shall surrender the Premises to Landlord, upon the expiration
or earlier termination of the Lease, free of Hazardous Materials which are or
were attributable to Tenant. If Tenant fails to so surrender the Premises,
Tenant shall indemnify and hold Landlord harmless from all damages resulting
from Tenant's failure to surrender the Premises as required by this paragraph,
including, without limitation, any claims or damages in connection with the
condition of the Premises including, without limitation, damages occasioned by
the inability to relet the

                                      -22-
   23
Premises or a reduction in the fair market and/or rental value of the Premises
or the Complex by reason of the existence of any Hazardous Materials, which are
or were attributable to the activities of Tenant, in or around the Premises or
the Complex.

         Notwithstanding any provision to the contrary in this Lease, if any
action is required to be taken by a governmental authority to clean-up, monitor
or remove any Hazardous Materials, which are or were attributable to the
activities of Tenant, from the Premises or the Complex and such action is not
completed prior to the expiration or earlier termination of the Lease, then at
Landlord's election (i) this Lease shall be deemed renewed for a term commencing
on the expiration date of this Lease and ending on the date the clean-up,
monitoring or removal procedure is completed (provided, however, that the total
term of this Lease shall not be longer than 34 years and 11 months); or (ii)
Tenant shall be deemed to have impermissibly held over and Landlord shall be
entitled to all damages directly or indirectly incurred in connection with such
holding over, including without limitation damages occasioned by the inability
to relet the Premises or a reduction in the fair market and/or fair rental value
of the Premises or the Complex by reason of the existence of the Hazardous
Material.

         F. Upon the Lease Commencement Date, Tenant shall provide to Landlord a
complete list of all chemicals, toxic waste or Hazardous Materials employed by
Tenant within the Premises. Throughout the term of the Lease, Tenant shall
continue to update this list of chemicals, contaminants and Hazardous Materials.
This paragraph is continued below.

44. MISCELLANEOUS AND GENERAL PROVISIONS

         a. Tenant shall not, without the written consent of Landlord, use the
name of the building for any purpose other than as the address of the business
conducted by Tenant in the Premises.

         b. This Lease shall in all respects be governed by and construed in
accordance with the laws of the State of California. If any provision of this
Lease shall be invalid, unenforceable or ineffective for any reason whatsoever,
all other provisions hereof shall be and remain in full force and effect.

         c. The term "Premises" includes the space leased hereby and any
improvements now or hereafter installed therein or attached thereto. The term
"Landlord" or any pronoun used in place thereof includes the plural as well as
the singular and the successors and assigns of Landlord. The term "Tenant" or
any pronoun used in place thereof includes the plural as well as the singular
and individuals, firms, associations, partnerships and corporations, and their
and each of their respective heirs, executors, administrators, successors and
permitted assigns, according to the context hereof, and the provisions of this
Lease shall inure to the benefit of and bind such heirs, executors,
administrators, successors and permitted assigns. 

The term "person" includes the plural as well as the singular and individuals,
firms, associations, partnerships and corporations. Words used in any gender
include other genders. If there be more than one Tenant the obligations of
Tenant hereunder are joint and several. The paragraph headings of this Lease are
for convenience of reference only and shall have no effect upon the construction
or interpretation of any provision hereof.

         d. Time is of the essence of this Lease and of each and all of its
provisions.

         e. At the expiration or earlier termination of this Lease, Tenant shall
execute, acknowledge and deliver to Landlord, within ten (10) days after written
demand from Landlord to

                                      -23-
   24
Tenant, any quitclaim deed or other document required by any reputable title
company, licensed to operate in the State of California, to remove the cloud or
encumbrance created by this Lease from the real property of which Tenant's
Premises are a part.

         f. This instrument along with any exhibits and attachments hereto
constitutes the entire agreement between Landlord and Tenant relative to the
Premises and this agreement and the exhibits and attachments may be altered,
amended or revoked only by an instrument in writing signed by both Landlord and
Tenant. Landlord and Tenant hereby agree that all prior or contemporaneous oral
agreements between and among themselves and their agents or representatives
relative to the leasing of the Premises are merged in or revoked by this
agreement.

         g. Neither Landlord nor Tenant shall record this Lease or a short form
memorandum hereof without the consent of the other.

         h. Tenant further agrees to execute any amendments required by a lender
to enable Landlord to obtain financing, so long as Tenant's rights hereunder are
not substantially affected.

         i. Paragraph(s) 45 through 49 are/is added hereto and are/is included 
as a part of this Lease.

         j. Clauses, plats and riders, if any, signed by Landlord and Tenant and
endorsed on or affixed to this Lease are a part hereof.

         k. Tenant covenants and agrees that no diminution or shutting off of
light, air or view by any structure which may be hereafter erected (whether or
not by Landlord) shall in any way affect this Lease, entitle Tenant to any
reduction of rent hereunder or result in any liability of Landlord to Tenant.

         IN WITNESS WHEREOF, Landlord and Tenant have executed and delivered
this Lease as of the day and year first above written.

LANDLORD:                               TENANT:
  CROSSROADS ASSOCIATES AND               SIEBEL SYSTEMS, INC., a
  CLOCKTOWER ASSOCIATES                   California Corporation

By ________________________________     By __________________________________
                                           
Title ______________________________   Title ________________________________
                                           

                                      -24-
   25
Paragraph 4.A. BASIC RENT (continued)

         As of the execution date of this Lease, Landlord and Tenant hereby
acknowledge that it is Tenant's intention to sublease the second and third
floors of the Premises. The agreed upon rentable square footage for the second
and third floors (which square footage indicated for each floor includes that
particular floor's proportionate share of Building common areas such as the
first floor Lobby, elevators, restrooms, stairwells and exit corridors) is
hereby agreed to be 13,961 rentable square feet per floor. The monthly Basic
Rent for each of the second and third floors as of the commencement of the Lease
is hereby agreed to be $27,223.95 per month (13,961 s.f. x $1.95).
Notwithstanding anything herein to the contrary, Landlord agrees to postpone the
commencement of Basic Rent on the second floor to September 1st, 1996 and on the
third floor to October 15th, 1996 for the purpose of phasing in Tenant's
subtenants. In the event that a subtenant occupies and commences payment of
Basic Rent prior to September 1st, 1996 for the second floor and October 15,
1996 for the third floor, then Tenant's Basic Rent obligations shall commence
upon the same day as the commencement of the subtenants obligations. Any credits
due Tenant under this "phase-in" arrangement shall be credited against the
November Basic Rent payment.

Paragraph 4D.  ADDITIONAL RENT (continued)

         Tenant hereby acknowledges that the Additional Rent estimated per
paragraph 4D of the Lease has been prepared by Landlord. The actual cost
incurred is directly related to the manner in which Tenant uses and occupies the
Premises. Landlord's estimate is based on the following per square foot per
month estimate of expenses:


                                                     
         Management                                    .058
         Insurance                                     .045
         Taxes                                         .119
         Exterior Maintenance                          .015
         Building Utilities                            Direct by Tenant
         Other Utilities                               .020
         Maintenance (Bldg.)                           .075
         Security                                      .018
         Janitorial                                    .070
                                                       ----
         Total                                         .420


         The above estimate is for calendar year 1996, and shall be adjusted per
paragraph 4D of the Lease.

         The following squire footages are stated for reference:


                                                                
         1825 South Grant Street (Building I)             155,489 s.f.
         1875 South Grant Street (Building II)            170,922 s.f.
         1855 South Grant Street (Building III)            66,426 s.f.
                                                          ------------
         Total square footage                             392,837 s.f.

 
         Tenant's percentage occupancy is therefore as follows:

         Percent of Building                          = 100%
         Percent of Complex 66,426 divided by 392,387 = 16.9%

         The following shall be exclusions to any operating expenses as defined
under this Lease.

         a)       Costs incurred to provide services to other tenants which are
                  not furnished to Tenant.

         b)       Expenses for which the Landlord is reimbursed or indemnified
                  either by an insured, condemnor, tenant or otherwise.

         c)       Any Ground Lease rental expenses.

                                       10
   26
         d)       The cost of correcting defects in the construction of the
                  Building or defects in the Building equipment (excluding
                  normal maintenance.)

         Within 90 days after receipt of Landlord's Statement (the "Statement")
setting forth Tenant' share of actual expenses of operation, management and
maintenance of the Complex, Premises and Building and any other items of
Additional Rent (the "Operating Expenses and Real Property Taxes"), Tenant shall
have the right to audit at Landlord's local offices, at Tenant's expense,
Landlord's accounts and records relating thereto. Such audit shall be conducted
by a certified public accountant approved by Landlord, which approval shall not
be unreasonably withheld. If such audit reveals that Landlord has overcharged
Tenant, the amount overcharged shall be paid to Tenant within 30 days after the
audit is concluded, together with interest thereon at the rate of 10% per annum,
from the date the Statement was delivered to Tenant until payment of the
overcharge is made to Tenant. In addition, if the Statement exceeds the actual
Operating Expenses and Real Property Taxes which should have been charged to
Tenant by more than 5%, the cost of the audit shall be paid by Landlord.

Paragraph 4F.  SECURITY DEPOSIT (continued)

         In addition to the cash security deposit as defined in paragraph 4.F.,
Tenant agrees to tender to Landlord, within 20 days of execution of this Lease
and irrevocable standby Letter of Credit in the amount of $1,325,000. The form
of the irrevocable standby Letter of Credit must be acceptable to Landlord. The
Letter of Credit must provide that Landlord have the ability to cash or draw the
entire amount solely upon Landlord's representing to the issuing Bank that
Tenant is in uncured monetary default of the Lease. The Letter of Credit
required hereunder shall remain in full force and effect until August 1, 2001.
At such time after August 1st, 2001 as the value of Tenant's shareholder equity
becomes $70,000,000, then Landlord hereby agrees to cancel the requirement for
the additional security provided by this Letter of Credit and to return the
Letter of Credit to Tenant. The expiration date of the Letter of Credit shall be
the expiration date of this Lease. In the event Tenant has not provided Landlord
the Letter of Credit as required, Landlord may prohibit Tenant from occupying
the Premises until such time as the Letter of Credit is received by Landlord,
and Tenant agrees that Tenant's Basic and Additional Rent obligations shall
nevertheless commence without offset or delay even if Tenant is prohibited from
occupying the Premises because of Tenant's failure to deliver the Letter of
Credit.

Paragraph 9.  ALTERATIONS AND ADDITIONS (continued)

         Any alteration or addition to the Premises made by Landlord (or
Landlord's contractors) shall be on a "open book" basis. Landlord shall obtain a
minimum of three bids on any major cost items involved in any tenant
improvements. Tenant may request Landlord bid subcontractors of Tenant's
choosing, and subcontractors must be licensed to do business in the State of
California. Landlord (or Landlord's contractors) shall receive a 10% fee, which
10% is based on the actual direct cost of construction. The 10% fee shall
include general conditions, overhead, and profit.

Paragraph 11.  UTILITIES (continued)

         As stated above the gas and electric meters shall be placed in Tenant's
own name and account and the cost of these utilities shall be paid directly by
Tenant. Tenant shall have access to the Premises (and notwithstanding paragraph
11 access to all utilities) 24 hours a day, seven days a week. Landlord's
standard operating times are 8am to 6pm, five days a week for a total of 50
hours per week x 52 weeks = 2600 hours per year. In the event Tenant uses

                                       11
   27
the main HVAC Systems more than 2600 hours per year, for each hour in excessive
2600 hours Tenant agrees to pay the amount of $3.33 per hour as the cost of
accelerated wear and tear on the main HVAC System. This amount is calculated as
follows:


                                                      
Replacement cost of main System and components          $  125,000
Average Life expectancy of
main System and components                       divided by 37,500 hours
Dollars per hour (A divided by B)                       $     3.33 per hour


Paragraph 17.  COMPLIANCE (continued)

         Landlord and Tenant each hereby agree that the City of San Mateo
issuance of an occupancy permit for the Premises represents that as of the date
of the occupancy permit the Premises and Common Areas of the Complex are in full
compliance with all applicable building codes, ADA laws, and all other
regulations and statutes affecting the Building. If a violation in compliance
with the above referenced building codes, etc., is discovered within 180 days of
the commencement of this Lease and such violation was caused by Landlord or
Landlord's contractors, or agents, Landlord shall correct such violation at
Landlord's sole cost and expense.

Paragraph 19.  ASSIGNMENT/SUBLETTING (continued)

         Notwithstanding anything to the contrary herein, Landlord's consent
shall be deemed given for Tenant to assign or sublet to an affiliate,
subsidiary, parent company or successor to the corporate business of Tenant (a
"Permitted Assignee") and Tenant agrees to remain liable for the full
performance of all lease obligations.

Paragraph 20.  SUBORDINATION AND MORTGAGES (continued)

         Notwithstanding anything to the contrary herein, the provisions of any
mortgages or the underlying groundlease concerning the Premises shall not
increase the financial obligations of Tenant hereunder or adversely affect the
leasehold interest of Tenant created hereunder including Tenant's rights and
Landlord's obligations.

Paragraph 41.  SIGNS (continued)

         Notwithstanding anything herein to the contrary, Landlord agrees to
allow Tenant at no additional charge to place one exterior sign on the Building,
which sign must be approved by Landlord, and which approval will not be
unreasonably withheld. Tenant may also "silkscreen" signage on the exterior
lobby entry doors. Tenant shall pay for the cost of said signage. Exhibit "E" is
an example of such signage. Exhibit "E" is used for representative purposes only
and is not intended to be to scale. Any exterior sign placed on the Building by
Tenant must be in complete compliance with the City of San Mateo sign
ordinances. Landlord has not received specific approval from the City of San
Mateo to place a lighted sign on the Premises. Landlord and Landlord's architect
shall use its best efforts to obtain such approval. Two lighted signs have been
approved for the Complex and one lighted sign exists on each of the two high
rise buildings. In the event the City of San Mateo allows only two lighted signs
at the Complex, Landlord agrees to offer to the City of San Mateo to remove the
west facing lighted sign on the Building at 1875 South Grant Street and use that
approved signage as a trade for Tenant's Premises, or denies Landlord's trade of
the lighted sign on 1875 South Grant for a sign on Tenant's Premises, an the
result is Tenant does not have signage on the Premises, this shall in no way
effect the obligations between Landlord and Tenant hereunder and the Lease shall
remain in full force and effect without any diminution of rent or other offset
against Landlord. In the event that Tenant occupies more

                                       12
   28
than 200,000 square feet in the Complex, Landlord agrees to substitute Tenant's
name for the "Crossroads" west facing sign on the Building at 1875 South Grant
Street. The cost of substitution shall be borne by Tenant. Notwithstanding
anything herein to the contrary, Landlord hereby approves an internally
illuminated sign with the "SIEBEL" logo in PMS-541 blue as shown by the drawing
represented by Exhibit E-2.

Paragraph 43.  HAZARDOUS MATERIALS (continued)

         Landlord, to the best of Landlord's knowledge without a duty to
inspect, has no knowledge of the presence of any hazardous materials in the
Building, in the soil upon which the Building is located, or in the groundwater
under the Complex. Landlord shall defend, hold harmless and indemnify Tenant
with respect to all claims, damages and liabilities arising out of or in
connection with any Hazardous Material used, stored, discharged, released or
disposed of in, from, under or about the Premises or the Complex, where said
Hazardous Material is or was not attributable to the activities of Tenant during
the Lease term and whether or not Tenant had knowledge of such Hazardous
Material, including, without limitation, any cost of monitoring or removal.

Paragraph 45.  TENANT'S OPTION TO EXPAND



                              Date of
Floor    Rentable Square      Exercise          Date of       Floor Plan
             Footage          of Option      Availability
                                                    
 10          17,702            12/31/96         2/15/98         F-2
 9           17,702             5/30/97         7/31/98*        F-3
 8           17,702             7/30/97         9/30/98         F-4
 4           17,702            10/30/96        11/15/97         F-5

        
         *    Subject to existing tenant's option to extend.

         The ten story Building located at 1875 South Grant Street, as outlined
in green on Exhibit F1, has the following full floors coming available on the
dates as indicated above. Floor plans of each of the floors becoming available
are shown as Exhibits F-2, 3, 4, 5. The existing tenant on the Ninth Floor has a
preexisting option to extend its lease. In the even said Tenant exercises its
option to extend, the Ninth Floor will not be available and is not subject to
this paragraph 45.

         Landlord hereby grants to Tenant the Option (Subject to the Ninth floor
Tenant's option to extend on the 9th floor only) to lease the 10th, 9th, 8th and
4th floors at 1875 South Grant Street. Tenant shall have the Option to lease any
or all of the floors subject to this Option. For each floor for which Tenant has
this Option, Tenant must exercise its Option to Lease by delivering an Exercise
of Option to Landlord in writing on or before the "Date of Exercise of Option"
as indicated in the above table. Each floor will become available on the date of
availability as indicated. The Lease commencement date for each floor shall be
30 days after the date of availability or upon occupancy of all or a portion of
the floor by Tenant's operating personnel, whichever occurs sooner. Tenant shall
lease each floor in an as-is condition, with Landlord granting Tenant an
improvement allowance of $77,000 per floor towards standard office improvements
requested by Tenant. This $77,000 shall be adjusted by the CPI (said CPI as
defined in paragraph 38) for the adjustment period beginning August 1st, 1996 to
the date of availability for each particular floor represented by this option.
The improvement allowance granted Tenant hereunder shall be in form of Basic
Rent abatement. For example, if a particular floor leased by Tenant used $77,000
of Landlord's improvement allowance, then for the month immediately succeeding
the commencement of Lease for that particular floor, the Basic Rent due and
payable due under this Lease shall be reduced by the amount of allowance used.
The Termination Date of Lease for each of the

                                       13
   29
floors leased under this paragraph shall be co-terminus with the Lease for the
Building at 1855 South Grant Street. Each Floor leased under this paragraph 45
shall also be subject to Tenant's Option to Extend as described below. The Basic
Rent for each floor leased under this paragraph 45 shall be at the same Basic
Rent per square foot per month as is described in paragraph 4A of the Lease. For
example, if Tenant leased the Fourth Floor with a commencement date of 12/15/97,
and at that time Tenant's Basic Rent was $2.00 per square foot per month,
Tenant's monthly Basic Rent would be 17,702 x $2.00 = $35,404. The Basic Rent
per square foot per month will be increased at the same rate per square foot and
upon the same dates and in the same manner as is provided for in paragraphs 4.A.
and 38 of the Lease. Tenant's Additional Rent shall be at the same rate per
square foot per month as is then applicable at the time of occupancy of the
floors leased hereunder. For each floor so leased by Tenant, Tenant's parking
shall be increased by 52 spaces. Any modifications to the Floors leased by
Tenant under this Option shall be made in accordance with Paragraphs 8 to 9 of
this Lease, with Tenant paying (subject to Landlord's $77,000 per Floor
allowance as indicated above) all costs and expenses associated with any
remodel. Upon the date of availability', Tenant shall be granted access to each
floor leased by Tenant for the installation of telephone and other
communications. Tenant's installation shall not interfere with any of Tenant's
requested Improvements to be made by Landlord, and the installation by Tenant of
telephone, communication, furniture, and fixtures shall not constitute actual
occupancy, but only occupancy with Tenant's operating personnel prior to the 30
day period indicated above shall commence the payment of Basic and Additional
Rent.

Paragraph 46.  SECURITY SYSTEMS

         Tenant shall have the right to establish its own procedures so as to
maintain and protect the internal security of the Premises in accordance with
Tenant's needs. Tenant shall have the right to install additional security
devices for the Premises, including, without limitation, Security Card Systems
for control of access to the Premises. Landlord shall have the reasonable right
to review and approve these systems. Tenant acknowledges that Landlord's
approval shall be subject to Tenant's agreement to repair any damage to any
portion of the Premises resulting from Tenant's installation of any security
system, and Tenant agrees to completely restore the Premises to the condition
prior to the installation of any security system. Tenant acknowledges that this
restoration potentially require replacement of doors, window mullions, door
frames and the like. All restoration shall be in accordance with the terms of
the Lease.

Paragraphs 47.  RIGHT OF FIRST OFFER.

         Exhibits G1 and G2 each show an additional floor: the ninth floor and
eighth floor of the Building located at 1825 South Grant Street, California.
These two floors are subject to this paragraph 47 whereby Landlord grants to
Tenant a Right of First Offer to lease these two floors. The two floors are
currently leased to VISA U.S.A. and VISA INTERNATIONAL (hereinafter referred to
as VISA) with a Lease expiration date of April 30th, 2001. Provided Tenant is
not in default under any terms, covenants and conditions of this Lease,
commencing August 1st, 1996 and ending on the Lease Termination (as it may be
extended pursuant to paragraph 48), Landlord hereby grants to Tenant the right
of First Offer to Lease the Eighth and Ninth Floor of the Building at 1825 South
Grant Street, San Mateo, San Mateo County, California as shown on Exhibits G1
and G2. Tenant's Right of First Offer shall be upon and subject to the following
terms and conditions:

         a) Tenant's right to lease the two floors shall be the right to accept
a proposal by Landlord to lease such space that becomes available during the
time period referenced above. It is specifically agreed that Landlord shall have
the right to extend

                                       14
   30
the term of Lease for VISA for any time period that Landlord and VISA may so
agree. In the event that VISA's lease expires and the space becomes available
Landlord shall notify Tenant in writing of the availability of the space and
shall tender to Tenant the terms under which Landlord will lease the space to
Tenant. The terms shall include the rent, increases in rent, the term, the size
of the space, the Tenant improvement allowances, if any, and the like. Tenant
shall have 10 business days within which to accept the proposal made by
Landlord.

         b) In the event Tenant does not accept the proposal by Landlord, then
Landlord agrees that it will not lease that same space to another tenant on
terms that are more favorable than those proposed to Tenant without first
offering the more favorable terms to Tenant and allowing Tenant three business
days within which to accept the more favorable terms.

         c) In the event Tenant fails to accept the proposal from Landlord to
lease the floors described on Exhibits G1 and G2 which become available for
lease, then Landlord shall have no further obligations to Tenant with respect to
these two floors.

Paragraph 48.  OPTIONS TO EXTEND

         Provided Tenant is not in default under any of the terms, covenants or
conditions of this Lease, and subject to the terms and conditions set forth
hereafter, Tenant is granted two options to extend this Lease for two successive
five year periods. In the event Tenant does not extend the initial term of Lease
for five years per this paragraph 47 then Tenant's Option to Extend for a second
five year period shall be null and void.

         (a)     Tenant shall notify Landlord in writing of Tenant's exercise of
                 its first Option to Extend this Lease on or before August 1,
                 2005. Tenant shall notify Landlord in writing of Tenant's
                 exercise of its Second Option to Extend on or before August 1,
                 2010.

         (b)     The Fist Extended Term of this Lease shall commence on August
                 1st, 2006 and shall terminate upon July 31st, 2011. The Second
                 Extended Term of this Lease shall commence August 1, 2011 and
                 shall terminate July 31st, 2016.

         (c)     The monthly Basic Rent as of the commencement date of each
                 extended term of Lease shall be the then prevailing market rate
                 with interim adjustments (if any) then being charged for
                 comparable space of comparable quality in the immediate
                 geographical area, but in no event shall the monthly Basic Rent
                 be less than the monthly Basic Rent for the last month of the
                 initial term of the Lease (in the case of the First Extended
                 Term) or less than the monthly Basic Rent for the last month of
                 the First Extended Term (in the case of the Second Extended
                 Term).

         (d)     The then current payment for Additional Rent described in 4D of
                 the Lease shall continue to be adjusted according to paragraphs
                 4D of this Lease.

         (e)     This option to extend can be exercised only by Sibel Systems,
                 Inc. or any Permitted Assignee for use of the Premises by
                 Siebel or a Permitted Assignee and may not be transferred or
                 assigned to any other sublessee or other party, nor may this
                 option be exercised by Siebel Systems, Inc. for the use of the
                 Premises by any sublessee or party other than Siebel Systems,
                 Inc.

         (f)     The Options to Extend described herein shall apply to all the
                 space then leased by Tenant as of the date of exercise of each
                 option.

                                       15
   31
Paragraphs 49.  INCORPORATION

         Tenant was incorporated under the laws of California in 1993, and it is
anticipated that Tenant will reincorporate in Delaware prior to the completion
of a public offering. At such time as Tenant reincorporates in Delaware, the
reincorporated Delaware Corporation shall be defined as Tenant hereunder, and
shall have all the rights and obligations as Tenant hereunder.

                                       16
   32
                                    EXHIBITS
                                 LEASE AGREEMENT
                                     BETWEEN
                 CROSSROADS ASSOCIATES AND CLOCKTOWER ASSOCIATES
                                       AND
                              SIEBEL SYSTEMS, INC.

1. EXHIBIT A-1: Site Plan - Final, including proposed YMCA Building and proposed
Building 3, of 1825 South Grant Street, Building 1 and 1875 South Grant Street,
Building 2 and surrounding parking area.

2. EXHIBIT A2: Plan of Floor 1 of Crossroads Building Three, 1855 South Grant
Street, San Mateo, CA.

3. EXHIBIT A3: Plan of Floor 2 of Crossroads Building Three, 1855 South Grant
Street, San Mateo, CA.

4. EXHIBIT A4: Plan of Floor 3 of Crossroads Building Three, 1855 South Grant
Street, San Mateo, CA.

5. EXHIBIT A5: Plan of Floor 4 of Crossroads Building Three, 1855 South Grant
Street, San Mateo, CA.

6. EXHIBIT A6: Plan of Floor 5 of Crossroads Building Three, 1855 South Grant
Street, San Mateo, CA.

7. EXHIBIT B: Site Plan - Final, including proposed YMCA Building and proposed
Building 3, of 1825 South Grant Street, Building 1 and 1875 South Grant Street,
Building 2 and surrounding parking area.

8. EXHIBIT E: Diagram of Building with Proposed "Siebel" sign (wide-angle view).

9. EXHIBIT E-2: Close-up view of "Siebel" sign on Building.

10. EXHIBIT F-1: Site Plan - final, including proposed YMCA Building and
proposed Building 3, of 1825 South Grant Street, Building 1 and 1875 South Grant
Street, Building 2 and surrounding parking area.

11. EXHIBIT F-2: Plan of Floor 10 of Crossroads Building Two, 1875 South Grant
Street, San Mateo, CA.

12. EXHIBIT F-3: Plan of Floor 9 of Crossroads Building Two, 1875 South Grant
Street, San Mateo, CA.
   33
13. EXHIBIT F-4: Plan of Floor 8 of Crossroads Building Two, 1875 South Grant
Street, San Mateo, CA.

14. EXHIBIT F-5: Plan of Floor 4 of Crossroads Building Two, 1875 South Grant
Street, San Mateo, CA.

15. EXHIBIT G1: Plan of Floor 9 of Crossroads Building One, 1825 South Grant
Street, San Mateo, CA.

16. EXHIBIT G2: Plan of Floor 8 of Crossroads Building One, 1825 South Grant
Street, San Mateo, CA.
   34
                                   EXHIBIT "C"

           CROSSROADS III STANDARD TENANT IMPROVEMENTS AND ALLOWANCES
                  (Based on Net Usable Area of 58,795 sq. ft.)

- --------------------------------------------------------------------------------


                                                                      
PARTITIONING              Standard Drywall Construction
                          at 9' 0" high with a smooth painted
                          finish.  Tenant partitions to extend
                          to the bottom face of the suspended
                          ceiling except as otherwise required by code.     as indicated

DOORS                     3' 0" x 9' 0" (full height)( solid core doors 
                          "natural oak" finish.                             as indicated.

HARDWARE                  All door frames to be anodize bronze and
                          hardware a "polish chrome" finish.
                          Locksets provided at entry doors. Passage set
                          hardware on all other doors.

LIGHT FIXTURES            2 x 4 drop-in fluorescent light fixtures with
                          white trim Parabolume chrome finish diffusers.    1 ea. per 85 SqFt.

SWITCHES                  Double light switches mounted on interior
                          partitions at 48" high.  Color to be white.       1 ea. per 250 SqFt.

ELECTRICAL                (See Below)
                          Floor 1

                          (10)  dedicated 110V outlets
                          ( 5)  duplex outlets
                          (20)  fourplex outlets
                          (30)  data location drops
                          J Box power in ceilings for 2 screens and (1) VCR
                          ( 3)  screens in ceilings with electrical adjustment

                          Floors 2 & 3

                          ( 6)  dedicated 110V outlets
                          (20)  duplex outlets
                          (20)  fourplex outlets
                          (20)  data locations
                                Power/Data for 51 furniture cubicles, maximum
                                3 cubicles per circuit
                          ( 4)  core drills for power/data

                          Floor 4

                          ( 2)  Isolated ground outlets for telephone/Server
                          ( 8)  Dedicated 110V outlets
                          (20)  Duplex 100V
                          (20)  Fourplex outlets 110V
                          (20)  Data Locations
                                Power/Data for 51 furniture cubicles, maximum
                                3 cubicles per circuit
                          ( 4)  Core drill locations for power/data

                          Floor 5

                          ( 6)  Dedicated 110V outlets


                                   1
   35

                                                                                    
                          (25)  Fourplex 110V outlets

                          (25)  Duplex outlets
                          (25)  Data Locations
                                Power/Data for 30 furniture cubicles, maximum
                                3 cubicles per circuit
                          ( 3)  Core drill locations

TELEPHONE
OUTLETS                   Junction boxes, plaster rings and pull wires
                          for telephone outlets mounted on interior
                          partitions. Telephone and data cabling
                          supplied by Tenant must be rated to meet
                          Building code requirements.

HVAC                      SYSTEM Return and supply air diffusers will be
                          perforated drop-in grills that fit into the grid
                          ceiling system. Color off white.
                          Zones                                                  1 ea. per 850 SqFt.
                          Outlets                                                1 ea. per 180 SqFt.
                          Returns                                                1 ea. per 275 SqFt.
                          Landlord to provide one 24 hour HVAC System to
                          1 Server Room

FIRE SPRINKLER            Building standard semi-recessed chrome pendant
                          heads with escutcheon. Designed for normal
                          office use (light hazard).                             1 ea. per 135 SqFt.

CEILING                   2 x 2 drop-in tegular acoustical tile with
                          white fissured pattern. Ceiling grid is
                          exposed tee bar with a white finish.                   All areas.

CARPET                    32 oz. dense plush cut pile nylon or level
                          loop of equal value. Carpet to be direct glued
                          for maximum durability. Color selection
                          available.                                             All areas.

WINDOW

COVERINGS                 1" horizontal off white window blinds.                 All Exterior Windows


         The scope of Landlord's tenant improvement work is indicated Exhibits
A-2, A-3, A-4, A-5 & A-6, each page representing a schematic floor plan layout.
Landlord and Tenant acknowledge that this is the approved layout which Landlord
is to include at Landlord's sole cost and expense. Landlord agrees to install
all partitioning as indicated on the floor plan together with all doors,
hardware and glass sidelights as indicated. The millwork to be included at
Landlord's cost is shown in yellow and includes:

         Floor 1

         *        Kitchen cabinet, upper and lower as indicated.
         *        Long shelf with partitions in the telephone area as indicated.

         Floors 2, 3, 4

         *        Upper and lower cabinets in coffee/copy area as indicated and
                  lower cabinets where the sink is located.

                                       2
   36
         Floor 5

         *        Upper and lower cabinets in coffee/copy area and lower
                  cabinets and sink unit as indicated and lower cabinets in
                  coffee area and sink as indicated. Landlord's cabinet work
                  will be plastic laminate with color selection be made by
                  Tenant.

         *        Lower cabinets adjacent to contract room.

         PLUMBING

         Landlord's plumbing (outside of finished bathrooms in the core) in one
         sink in the kitchen area and on floors 2, 3, 4 & 5 sink in coffee/copy
         area. Fifth floor, second sink outside of Board Room.

         GLASS

         Landlord will provide glass sidelights adjacent to the doors as
         indicated and glass adjacent to the wooden doors on the fifth floor
         Board Room as indicated. The glass of the fifth floor Board Room will
         be frameless and but must contain wire in order to obtain fire rating.

         Specifically excluded from Landlord's scope of work is the following,
         which items if installed at the request of Tenant, shall be paid for by
         Tenant per paragraph 3.2 of Exhibit "D". Some of these items are shown
         in orange on Exhibit A-2 through A-6.

         First Floor

         *        Any kitchen equipment such as serving counter, freezers,
                  dishwashing equipment, walk-in coolers, vending machines,
                  cooktops, any special ventilation or any other items
                  associated with the "Cafe".

         *        The main reception desk, the visitors center desk.

         *        Any and all audio visual equipment in the training rooms
                  (excluding the 3 screens as described under Landlord's
                  electrical above).

         *        Any "whiteboards" that Tenant may choose to install. Tenant
                  shall also pay for any and all millwork and plumbing not
                  described as by Landlord including a separate bathroom that
                  Tenant may wish to install in the fifth floor.

         *        Any computer/communications wiring, electronic security
                  systems, any custom lighting that will substitute for
                  Landlord's standard lighting fixtures, special lock-off
                  mechanisms in elevators.

         *        Any special sound attenuation or other specialized
                  construction in the training and multimedia areas or any other
                  custom built-in furniture or millwork associated in the Board
                  Room, the president's office or the multimedia rooms and any
                  additional offices that Tenant may choose to install over and
                  above those indicated on Exhibits A2 through A6 shall be
                  installed at Tenant's sole cost and expense.

         *        All furniture, modular partitions, furniture systems.

                                       3
   37
                                                                       EXHIBIT D

                          CONSTRUCTION OF IMPROVEMENTS

         It is hereby agreed:

         1.       PLANS AND SPECIFICATIONS. Landlord shall prepared at
Landlord's sole cost in accordance with Exhibit "C" complete plans and
specifications covering all tenant improvement work to be done in order to
prepare the Leased Premises for occupancy. Such plans and specifications shall
include the following:

                  a.       A fully dimensioned partition layout.

                  b.       An electrical plan showing all electrical, computer
                           and telephone outlets.

                  c.       A reflected ceiling plan showing all light fixtures
                           and light switches.

                  d.       Specifications for all materials, equipment, finishes
                           and colors.

                  e.       Specification of any special electrical, plumbing, or
                           HVAC requirements.

                  f.       Construction details for all cabinetry, millwork,
                           glass installation, sound control and other special
                           construction details as required.

         Landlord shall construct the tenant improvements in substantial
compliance with the plans and specifications to be supplied by Tenant, which
said plans and specifications shall be included with and become part of Exhibit
"C". It is further agreed that in the event the tenant improvements do not
conform exactly to the plans and specifications, but nevertheless the general
appearance, structural integrity, tenant improvements and Tenant's use and
occupancy of the leased Premises are not, in Landlord's reasonable discretion,
materially or unreasonably affected by such deviation, then Tenant's obligation
to pay rent shall not be affected and Tenant hereby agrees to accept the leased
Premises and tenant improvements as constructed by Landlord.

         2.       AUTHORIZATION TO PROCEED. Tenant shall make all decisions 
necessary in order for Landlord to prepare working drawings, and Tenant shall
make said decisions (including finish schedules) by June 7th, 1996. Landlord
shall determine Tenant's share, if any, of the cost of the tenant improvements
requested and shall submit a statement which sets forth Tenant's share of the
cost of the requested improvements to Tenant on or before June 14th, 1996.
Tenant shall authorize Landlord to proceed with construction of the tenant
improvements on or before June 18th, 1996 and shall submit payment to Landlord
as required by paragraph 3 below.

3.       ALLOWANCES AND PAYMENT. Should the Tenant Improvements required by 
Tenant exceed the quantities set forth in Exhibit "C", or require the
installation of any non-standard items, then Landlord and Tenant agree that said
over-standard and non-standard items shall be paid for as follows:

         Tenant's shall pay Tenant's portion of excess Tenant Improvements (if
any) as follows: 50% of July 1st, 1996, 40% on August 1st, 1996, and 10% upon
completion of any punch list items.

4.       COMMENCEMENT OF RENT. The commencement date of the Lease and Tenant's
obligation to pay rent under the terms and conditions of the Lease shall not be
delayed, affected, or changed as a result of the happening of any of the
following:

         a)       Delays in completion of tenant improvement work, if Tenant
                  fails to deliver complete plans and specifications as required
                  in paragraph 2 above.
   38
Exhibit D
Page 2

         b)       Delays in completion of tenant improvement work, if Tenant
                  fails to authorize Landlord to proceed with construction as
                  required by paragraph 2 above.

         c)       Delays in completion of tenant improvement work, if Tenant
                  fails to make the timely payment to Landlord for such work, as
                  required in paragraph 3 above.

         d)       Delays in completion of tenant improvement work, if Tenant
                  fails to make the timely payment to Landlord for such work, as
                  required in paragraph 3 above.

         e)       Delays in completion of tenant improvement work, caused by
                  work to be done by Tenant's subcontractors or delays caused by
                  Tenant changing, amending or modifying Tenant's plans and
                  specifications, amending or modifying Tenant's plans and
                  specifications.

         f)       Delays in completion of tenant improvement work experience by
                  Landlord in the installation of Tenant's non-standard
                  improvements.

         5.       PUNCH LIST. Landlord shall have a reasonable time, after 
completion by Landlord of the standard and non-standard tenant improvements as
set forth in Exhibit "C", to complete the "punch list" items which pertain to
the newly constructed tenant improvements without affecting Tenant's obligation
to pay rent under the terms of the Lease to which this Exhibit is attached.

         6.       RESTORATION. Non-standard items shall be installed on behalf 
of Tenant by Landlord at Tenant's sole cost and expense. It is specifically
agreed that upon expiration of the term of this Lease or upon any sooner
termination, Tenant, at Tenant's sole cost and expense, shall remove such
non-standard items as may be required by Landlord, repair any and all damage
caused by such removal and restore the Premises to a condition whereby standard
administrative offices may be readily installed. Notwithstanding anything herein
to the contrary, any non-standard items subject to the restoration provisions of
paragraph 8, including such items in Tenant's initial build-out, will be so
identified within three days of receipt of Tenant's plans.

         7.       ADDITIONAL OBLIGATIONS. The obligations to be performed under
the terms of this Exhibit "D" are intended to be obligations in addition to
those required by paragraphs 8 and 9 of the Lease to which this Exhibit is
attached and it is not the intent of the parties hereto that this Exhibit "D"
shall alter or supersede those paragraphs 8 and 9.
   39
                      RULES AND REGULATIONS OF THE BUILDING

                                        1

         No sign, placard, picture, advertisement, name or notice shall be
inscribed, displayed or printed or affixed on or to any party of the outside of
the Premises or any exterior windows of the Premises without the written consent
of Landlord first had and obtained and Landlord shall have the right to remove
any such sign, placard, advertisement, name or notice without notice to and at
the expense of Tenant.

         All approved signs or lettering on outside doors shall be printed,
painted, affixed or inscribed at the expense of Tenant by a person approved by
Landlord.

         Tenant shall not place anything or allow anything to be placed near the
glass of any window, door partition or wall which may appear unsightly from
outside the Premises.

                                        2

         Tenant shall not occupy or permit any portion of the Premises to be
occupied for the manufacture or sale of liquor, narcotics or tobacco in any form

                                        3

         The bulletin board or directory of the Premises will be provided for
the display of the number and location of Tenant, and Landlord will provide
directory service to a reasonable extent for Tenant at initial occupancy.
Changes thereafter shall be at Tenant's expense.

                                        4

         The sidewalks, passages, exits, entrances, elevators and stairways
shall not be obstructed by Tenant or used by it for any purpose other than
ingress to and egress from its Premises. The passages, exits, entrances,
stairways, balconies and roof are not for the use of the general public and
Landlord shall in all cases retain the right to control and prevent access
thereto by all persons whose presence in the judgment of Landlord shall be
prejudicial to the safety, character, reputation and interests of the Premises
and its tenants, provided that nothing herein contained shall be construed to
prevent such access to persons with whom Tenant normally deals in the ordinary
course of Tenant's business unless such persons are engaged in illegal
activities. Tenant, employees or invites of Tenant shall not go upon the roof of
the Premises.

                                        5

         The toilet rooms, urinals, wash bowls and other apparatus shall not be
used for any purpose other than that for which they are constructed and no
foreign substance of any kinds whatsoever shall be thrown therein and the
expense of any breakage, stoppage or damage resulting from the violation of the
rule shall be borne by Tenant who, or whose employees or invitees shall have
caused.

                                        6

         Tenant shall not overload the floor of the Premises or in any way
deface the Premises or any part thereof.

                                        7

         Landlord shall have the right to prescribe the weight, size and
pollution of all safes and other heavy equipment brought into the Premises and
also the times and manner of moving the same in and out of the Premises. Safes
or other heavy objects shall, if considered necessary by Landlord, stand on wood
strips of such thickness as is necessary to properly distribute the weight.
Landlord shall not be responsible for loss of or damage to any such safe or
property from any cause and all damage done to the Premises by moving or
maintaining any such safe or other property shall be repaired at the expense of
Tenant.

                                        8

         Tenant shall not employ any person or persons other than the Janitor of
Landlord or Tenant's personnel for the purpose of cleaning the Premises unless
otherwise agreed to by Landlord. Tenant shall not cause any unnecessary labor by
reason of Tenant's carelessness or indifference in the preservation of good
order and cleanliness.

                                        9

         Tenant shall not use, keep or permit to be used or kept any foul or
noxious gas or substance in the Premises, or permit or suffer the Premises to be
occupied or used in a manner offensive or objectionable to Landlord or other
occupants of the Premises by reason of noise, odors and/or vibrations, or
interfere in any way with other tenants or those having business therein, nor
shall any animals or birds with the exception of Dog Guides for the blind, be
brought in or kept about the Premises.

                                       10

                                       11

         Landlord will direct electricians as to where and how telephone and
telegraph wires are to be introduced. No boring or cutting for wires will be
allowed without the consent of Landlord. The location of telephones, call boxes
and other office equipment affixed to the Premises shall be subject to the
approval of Landlord.
   40
                                       12

         Tenant upon the termination of the tenancy, shall deliver to Landlord
the keys of offices, rooms and toilet rooms which have been furnished the Tenant
or which Tenant shall have had made, and in the event of loss of any keys so
furnished, shall pay Landlord therefor.

                                       13

         Tenant shall see the doors of the Premises are closed and securely
locked before leaving the Premises and must observe strict care and caution that
all water faucets or water apparatus within the Premises are entirely shut off
before Tenant or Tenant's employees leave the Premises, and that all electricity
shall likewise be carefully cut off, so as to prevent waste or damage.

                                       14

         Landlord reserves the right to exclude or expel from the Premises any
person who, in the judgment of Landlord, is intoxicated or under the influence
of liquor or drugs, or who shall in any manner do any act in violation of any of
the rules and regulations of the Premises.

                                       15

         The requirements of Tenant will be attended to only upon application to
Landlord at 755 Page Mill Road, Palo Alto, California 94304. Employees of
Landlord shall not perform any work or do anything outside of the regular duties
under special instructions from Landlord.

                                       16

                                       17

         Tenant shall not disturb, solicit, or canvass any occupant of the
Premises and shall cooperate to prevent same.

                                       18

         Landlord's initials                             Tenant's initials