UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549




Public Utility Holding Company Act of 1935
File No. 70-8711
Report For Period:  July 1, 2000 to December 31, 2000



In the Matter of:

PUBLIC SERVICE COMPANY OF OKLAHOMA
CENTRAL AND SOUTH WEST CORPORATION





      This report is filed under Rule 24 of the Public Utility  Holding  Company
Act of 1935 by Public Service  Company of Oklahoma (PSO) a subsidiary of Central
and South West Corporation  (CSW).  Under HCAR 35-26445 dated December 29, 1995,
it is  required  that PSO  file  semi-annual  reports  providing  the  following
information  with respect to the  activities  related to its  investment in RIKA
Management  Company,  L.L.C.,   Universal  Power  Products,   L.L.C.,  Automated
Substation Development Company,  L.L.C., and RC Training,  L.L.C.  (collectively
referred  to as the  RIKA  Companies):  1) a  description  of all  products  and
services that were developed,  in the process of development or being considered
for development by the RIKA Companies during the period, 2) a description of any
software or ancillary  services provided to PSO by the RIKA Companies during the
period,  3) a statement of any  dividends or interest  paid to PSO, both for the
period and cumulatively, as a result of its debt and equity holdings in the RIKA
Companies, and 4) a statement regarding the nature and consequences of any event
of  default  under  the  development  agreement  occurring  during  the  period,
including any resulting change in the voting interests held by PSO in any of the
RIKA  Companies  and any  exercise  of  control by PSO over the  management  and
affairs of any of the RIKA Companies. This report covers the period July 1, 2000
to December 31, 2000.


1) Description of all products and services that were developed,  in the process
of development or being  considered for development by the RIKA Companies during
the period

o                   The RIKA  Companies  continues  to add relay test  macros to
                    their  standard  Ultra-test  software  package.   They  have
                    completed  a "vector  program"  which  allows the user to do
                    quick  analysis of the real and  reactive  power  components
                    during relay testing.

o                   The RIKA  Companies  continue  to refine and  improve  their
                    database product adding new features and interfaces. Most of
                    development   involves  creating  links  to  enterprise-wide
                    software  packages  being  employed in the utility  industry
                    such as SAP. This software database is used to integrate the
                    multiple  substation/relay  maintenance and testing software
                    programs available on the market.


2)      Description of any software or ancillary services provided to PSO by
        the RIKA Companies during the period
        -----------------------------------------------------------------------

o                   In 1997, CSW completed the purchase and  installation of the
                    Ultra-test  relay  testing  package  for  each  of its  four
                    electric  operating   companies,   including  PSO.  American
                    Electric Power also uses the  Ultra-test  product making the
                    product a company standard for the merged American  Electric
                    Power/  Central  and  South  West   Corporation.   The  RIKA
                    Companies  provide  ongoing  maintenance  and support of the
                    product.

o                  CSW has purchased the software database product. Whether this
                   product  will  continue  to be used  within the new  American
                   Electric Power organization has yet to be determined.

o The RIKA  Companies  continue to provide a small  amount of basic and advanced
relay testing training.

3)      Statement of any dividends or interest paid to PSO, both for the period
        and  cumulatively,  as a result of
       ------------------------------------------------------------------------
        its debt and equity holdings in the RIKA Companies
        --------------------------------------------------

o                  RIKA  continues  to  experience  relatively  slow  growth and
                   requires  all  available  cash in  order to  provide  working
                   capital for operations. As a result, PSO recorded no interest
                   income in the first half 2000.  None of the provisions of the
                   agreement  were  modified  nor were any other  considerations
                   given as a result of this decision. PSO's cumulative interest
                   received from the RIKA Companies is $45,874.

o The RIKA  Companies  paid no dividends to PSO during the reporting  period nor
cumulatively.







4)      Statement  regarding the nature and consequences of any event of default
        under the development  agreement occurring during the period,  including
        any  resulting  change in the voting  interest held by PSO in any of the
        RIKA  Companies  and any exercise of control by PSO over the  management
        and affairs of any of the RIKA Companies

                   No events of  default,  change in the voting  interest or any
                   exercise of control occurred during the reporting period.







                                S I G N A T U R E


        As requested by order of this Commission  pursuant to the Public Utility
Holding Company Act of 1935,  Public Service Company of Oklahoma has duly caused
this report to be signed on its behalf on this 23rd day of February 2001.

                                                  Public Service Company
                                                  of Oklahoma

                                                  /s/    Armando Pena
                                                         Armando Pena
                                                         Treasurer