Exhibit 10.4


                          Accounts Payable and Payroll
                         Disbursement Services Agreement



     This Accounts Payable and Payroll Disbursement Services Agreement, dated as
of January 2, 1997 by and between PSCC, Inc., a California corporation ("PSCC"),
and American  Office Park  Properties,  L.P., a California  limited  partnership
("AOPP"):

                                    RECITALS:

     A.  AOPP  is a  party  to  certain  property  management  agreements,  (the
"Management  Agreements"),  whereby AOPP renders  management  services to owners
("Owners")  of  commercial  properties  ("Properties")  in  connection  with the
operation of such  Properties,  and AOPP operates the Properties  owned by AOPP;
and

     B. Under the Management Agreements,  AOPP is required to be responsible for
disbursing  funds  held on behalf of the  Owners  for the  payment  of  accounts
payable of the Owners and payroll  obligations of the Owners (referred to as the
"Accounts Payable and Payroll  Disbursement  Services").  AOPP desires to engage
PSCC to perform  such  Accounts  Payable and Payroll  Disbursement  Services for
AOPP,  with respect to both Properties  managed by AOPP and Properties  owned by
AOPP, and to employ the necessary personnel to perform such services.

     Now, therefore, the parties agree as follows:

     1. Engagement

          (a) AOPP hereby  engages PSCC as an  independent  contractor  and PSCC
hereby  accepts  such  engagement  as  described  herein,  upon  the  terms  and
conditions hereinafter set forth.

          (b) In the performance of its duties under this Agreement,  PSCC shall
occupy the position of an independent  contractor with respect to AOPP.  Nothing
contained  herein shall be construed  as making the parties  hereto  partners or
joint  venturers,  nor,  except as  expressly  otherwise  provided  for  herein,
construed  as making PSCC an agent or employee of AOPP or its  affiliates.  PSCC
shall not be responsible for the performance or failure to perform of AOPP under
the Management Agreements.

     2. Duties and Authority of PSCC

          (a) PSCC shall  provide  the  personnel  and  administrative  services
required for the  performance of the Accounts  Payable and Payroll  Disbursement
Services and shall be  responsible  for  performing  such  Accounts  Payable and
Payroll Disbursement Services on behalf of AOPP as and when directed by AOPP.

          (b)  AOPP  understands  and  acknowledges  that  some  or  all  of the
personnel described in Section 2(b) of this Agreement may simultaneously  render
services for other property managers and for other owners of facilities for whom
PSCC is rendering  services,  some of whom may (i) be  affiliates of PSCC and/or
(ii) compete with AOPP.

     3. Duties of AOPP

          AOPP hereby agrees to cooperate  with PSCC in the  performance  of its
duties under this  Agreement  and to that end,  upon the request of PSCC to give
PSCC  access to all files,  books and records of AOPP  relevant to the  Accounts
Payable and Payroll Disbursement Services to be performed by PSCC hereunder.

     4. Compensation of PSCC

          (a) In  consideration  for the  services  rendered  by PSCC under this
Agreement,  AOPP shall pay to PSCC an amount equal to the costs incurred by PSCC
(including  fringe  benefits)  in  rendering  to,  and on behalf of,  AOPP,  the
Accounts Payable and Payroll Disbursements Services provided for in Section 2(a)
of this Agreement. AOPP will bear all direct expenses,  attributable to services
rendered on behalf of AOPP hereunder,  as well as the appropriate  proportionate
share of shared  expenses  incurred on behalf of AOPP and others.  Upon request,
PSCC shall furnish AOPP with an accounting of such allocations.

          (b) Payments to PSCC under this Agreement shall be made upon demand by
PSCC, but not more often than weekly.

     5. Term

          (a) This Agreement  shall expire on the first  anniversary of the date
hereof,  provided that on each  anniversary  of the date hereof,  this Agreement
shall be  automatically  extended for one year unless  terminated  in accordance
with the  provisions of this Section 5. At any time more than 30 days prior to a
scheduled  expiration  date of this  Agreement,  AOPP may give written notice to
PSCC pursuant to Section 10 hereof that this Agreement  shall not be extended on
the next  scheduled  expiration  date. In the event that AOPP gives such notice,
this Agreement shall expire on the next scheduled expiration date.

          (b) Upon termination of this Agreement,  PSCC shall promptly return to
AOPP all monies,  books, records and other materials held by it for or on behalf
of AOPP.

     6. Indemnification

          AOPP hereby  agrees to  indemnify  and hold PSCC and all  officers and
directors of PSCC harmless from any and all costs,  expenses,  attorneys'  fees,
suits, liabilities, judgments, damages and claims when engaged in services under
this Agreement on behalf of AOPP, arising from any cause, except for the willful
misconduct,  negligence  or negligent  omissions on the part of PSCC or any such
other person. PSCC and all officers,  directors and employees of PSCC also shall
not be liable for any error of  judgment  or for any  mistake of fact or law, or
for  anything  which they may do or refrain  from doing  hereinafter,  except in
cases of willful  misconduct or negligence.  PSCC hereby agrees to indemnify and
hold AOPP harmless from any and all costs,  expenses,  attorneys'  fees,  suits,
liabilities,  judgments, damages and claims in connection with the management of
the Properties arising from the willful misconduct or negligence of PSCC and all
officers and directors of PSCC.

     7. Assignment

          Neither this Agreement nor any right  hereunder shall be assignable by
AOPP and any attempt to do so shall be void. PSCC shall have the right to assign
this Agreement to an affiliate or a wholly or majority  owned  subsidiary or any
entity acquiring substantially all of the assets of PSCC; provided, however, any
such  assignee  must assume all  obligations  of PSCC  hereunder,  AOPP's rights
hereunder  will be  enforceable  against any such assignee and PSCC shall not be
released  from its  liabilities  hereunder  unless  AOPP shall  expressly  agree
thereto in writing.

     8. Headings

          The headings  contained  herein are for  convenience of reference only
and are not  intended to define,  limit or  describe  the scope or intent of any
provision of this Agreement.

     9. Governing Law

          The validity of this Agreement,  the construction of its terms and the
interpretation  of the rights and duties of the parties shall be governed by the
internal laws of the state of California.

     10. Notices

          Any notice required or permitted  herein to be given shall be given in
writing  and shall be  personally  delivered  or  mailed,  first  class  postage
prepaid,  to the  respective  addresses  of the  parties  set forth  below their
signatures on the signature  page hereof,  or to such other address as any party
may give to the other in writing.

     11. Severability

          Should  any  term or  provision  hereof  be  deemed  invalid,  void or
unenforceable  either  in  its  entirety  or in a  particular  application,  the
remainder of this Agreement  shall  nonetheless  remain in full force and effect
and,  if the  subject  term  or  provision  is  deemed  to be  invalid,  void or
unenforceable  only  with  respect  to a  particular  application,  such term or
provision  shall  remain in full  force and  effect  with  respect  to all other
applications.

     12. Successors

          This  Agreement  shall be binding upon and inure to the benefit of the
respective  parties  hereto  and  their  permitted  assigns  and  successors  in
interest.

     13. Attorneys' Fees

          If it shall  become  necessary  for  either  party  hereto  to  engage
attorneys  to institute  legal  action for the purpose of  enforcing  its rights
hereunder  or for the purpose of  defending  legal  action  brought by the other
party  hereto,  the party or  parties  prevailing  in such  litigation  shall be
entitled  to  receive  all  costs,   expenses  and  fees  (including  reasonable
attorneys' fees) incurred by it in such litigation (including appeals).

     14. Counterparts

          This  Agreement may be executed in one or more  counterparts,  each of
which shall be deemed an original,  but all of which together  shall  constitute
one and the same instrument.





     IN WITNESS  WHEREOF,  the parties hereto have executed this Agreement as of
the date first above written.

                           "PSCC"

                           PSCC, INC.



                           By:    /s/ Ronald L. Havner, Jr.
                                  ------------------------------
                                  Ronald L. Havner, Jr., Vice President
                                  701 Western Avenue
                                  Glendale, California  91201


                           "AOPP"

                           AMERICAN OFFICE PARK PROPERTIES, L.P.

                           By:    American Office Park Properties, Inc.,
                                  General Partner



                                  By:      /s/ Ronald L. Havner, Jr.
                                          ------------------------------
                                          Ronald L. Havner, Jr., President
                                          701 Western Avenue
                                           Glendale, California  91201