UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                     ------

                                    FORM 10-K

(Mark One)

     [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

     For the fiscal year ended:   December 31, 2002
                                  -----------------

                                       OR

     [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

     For the transition period from               to
                                    -------------    -------------

                      Commission file number: 333-73712-06
                                              ------------


                                   CWABS, Inc.
                    Asset-Backed Certificates, Series 2002-S1
                    -----------------------------------------
             (Exact name of Registrant as specified in its charter)

<TABLE>
<S>                                                    <C>
              Delaware                                               95-4449516
-------------------------------                        ------------------------------------
(State or other jurisdiction of                        (IRS Employer Identification Number)
incorporation or organization)

c/o      Countrywide Home Loans Servicing LP
         4500 Park Granada
         Calabasas, California                                           91302
----------------------------------------               ------------------------------------
(Address of principal executive offices)                              (Zip Code)
</TABLE>

Registrant's telephone number, including area code:   (818) 225-3000
                                                      --------------

Securities registered pursuant to Section 12(b) of the Act:  None
                                                             ----

Securities registered pursuant to Section 12(g) of the Act:  None
                                                             ----


<PAGE>


Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the Registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes X No
                                       ---    ---

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K ( ss.229.405 of this chapter) is not contained herein, and
will not be contained, to the best of Registrant's knowledge, in definitive
proxy or information statements incorporated by reference in Part III of this
Form 10-K or any amendment to this Form 10-K. [ ]

Indicate  by check mark  whether  the  registrant  is an  accelerated  filer (as
defined in Rule 12b-2 of the Act. Yes      No  X
                                      ---     ---

State the aggregate market value of the voting and non-voting common equity held
by non-affiliates of the Registrant: Not applicable
                                     --------------

Indicate the number of shares outstanding of each of the registrant's classes of
common stock, as of December 31, 2002: Not applicable
                                       --------------

                                        2

<PAGE>



DOCUMENTS INCORPORATED BY REFERENCE

                                      None.

                                    *   *   *


     This Annual Report on Form 10-K (the "Report") is filed with respect to the
trust fund entitled CWABS, Inc., Asset-Backed Certificates, Series 2002-S1 (the
"Trust Fund") formed pursuant to the pooling and servicing agreement dated as of
April 1, 2002 (the "Pooling and Servicing Agreement") among CWABS, Inc., as
depositor (the "Company"), Countrywide Home Loans, Inc., as seller (the
"Seller"), Countrywide Home Loans Servicing LP, as master servicer (the "Master
Servicer"), and The Bank of New York, as trustee (the "Trustee"), and Wells
Fargo Bank Minnesota,N.A., as co-trustee (the "Co-Trustee"), for the issuance of
CWABS, Inc., Asset-Backed Certificates, Series 2002-S1 (the "Certificates").
Certain information otherwise required to be included in this Report by the
Instructions to Form 10-K has been omitted in reliance on the relief granted by
the Commission to other companies in similar circumstances, including, but not
limited to, the relief granted to CWMBS, Inc. (February 3, 1994) (collectively,
the "Relief Letters").
















                                        3

<PAGE>



                                     PART I


ITEM 1.   BUSINESS

          Not applicable.  See the Relief Letters.

ITEM 2.   PROPERTIES

          Not applicable.  See the Relief Letters.

ITEM 3.   LEGAL PROCEEDINGS

          There were no material pending legal proceedings relating to the Trust
          Fund to which any of the Trust Fund, the Trustee, the Master Servicer
          or the Company was a party or of which any of their respective
          properties was the subject during the fiscal year covered by this
          Report, nor is the Company aware of any such proceedings contemplated
          by governmental authorities.

ITEM 4.   SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

          No matter was submitted to a vote of Certificateholders, and no
          Certificateholder consent was solicited during the fiscal year covered
          by this Report.

                                        4

<PAGE>


                                      PART II


ITEM 5.   MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

          (a)  Market Information. There is no established public trading market
               for the Certificates.

          (b)  Holders. As of December 31, 2002 there were less than 300 holders
               of record of the Certificates.

          (c)  Dividends. Not applicable. See the Relief Letters. (Information
               as to distributions to Certificateholders is provided in the
               Registrant's monthly filings on Form 8-K.)

          (d)  Securities Authorized for Issuance Under Equity Compensation
               Plans. Not applicable.

          (e)  Item 701 of Regulation S-K. Not applicable. See the Relief
               Letters.

          (f)  Rule 463 of the Securities Act of 1933. Not applicable. See the
               Relief Letters.

ITEM 6.   SELECTED FINANCIAL DATA

          Not applicable.  See the Relief Letters.

ITEM 7.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
          RESULTS OF OPERATIONS

          Not applicable.  See the Relief Letters.

ITEM 7A   QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

          Not applicable.

ITEM 8.   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

          Not applicable.  See the Relief Letters.

ITEM 9.   CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
          FINANCIAL DISCLOSURE

          None.

                                        5

<PAGE>


                                    PART III


ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

          Not applicable.  See the Relief Letters.

ITEM 11.  EXECUTIVE COMPENSATION

          Not applicable.  See the Relief Letters.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

          Information required by Item 201(d) of Regulation S-K: Not applicable.

          Information required by Item 403 of Regulation S-K.

          (a)  Not applicable. See the Relief Letters.

          (b)  Not applicable. See the Relief Letters.

          (c)  Not applicable. See the Relief Letters.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

          Not applicable.  See the Relief Letters.

ITEM 14.  CONTROLS AND PROCEDURES

          Not applicable. The Registrant is an Asset-Backed Issuer (as defined
          in Exchange Act Rules 13a-14(g) and 15d-14(g)) and is therefore not
          required to disclose information under Item 307 of Regulation S-K. See
          paragraph (c) of Item 307 of Regulation S-K.

                                       6

<PAGE>


                                     PART IV


ITEM 15.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

          (a)  (1)  Pursuant to the Pooling and Servicing Agreement, the Master
                    Servicer is required (i) to deliver an annual statement as
                    to compliance with the provisions of the Pooling and
                    Servicing Agreement and certain other matters (the "Annual
                    Statement of the Master Servicer") and (ii) to cause a firm
                    of independent public accountants to deliver an annual
                    report as to compliance with the servicing provisions of the
                    Pooling and Servicing Agreement (the "Annual Report of the
                    Firm of Accountants"). The Annual Statement of the Master
                    Servicer is attached as Exhibit 99.1 to this Report. The
                    Annual Report of the Firm of Accountants is attached as
                    Exhibit 99.2 to this Report. See Relief Letters.

               (2)  Not applicable.

               (3)  The required exhibits are as follows:

                                Exhibit 3(i): Copy of Company's Certificate of
                    Incorporation (Filed as an Exhibit to Registration Statement
                    on Form S-3 (File No. 33-11095)).

                                Exhibit 3(ii): Copy of Company's By-laws (Filed
                    as an Exhibit to Registration Statement on Form S-3 (File
                    No. 33-11095)).

                                Exhibit 4: Pooling and Servicing Agreement
                    (Filed as part of the Registrant's Current Report on Form
                    8-K filed on May 17, 2002).

                                Exhibit 99.1: Annual Statement of the Master
                    Servicer.

                                Exhibit 99.2: Annual Report of the Firm of
                    Accountants.

                                       7

<PAGE>


          (b) Current Reports on Form 8-K filed during the last quarter ending
          December 31, 2002:

          Date of Current Report                        Item Reported
          ----------------------                        -------------
          September 25, 2002                     Monthly report sent to
                                                 certificateholders with the
                                                 September 2002 distribution.

          October 25, 2002                       Monthly report sent to
                                                 certificateholders with the
                                                 October 2002 distribution.

          November 25, 2002                      Monthly report sent to
                                                 certificateholders with the
                                                 November 2002 distribution.


          (c) See subparagraph (a)(3) above.

          (d) Not applicable. See the Relief Letters.

     SUPPLEMENTAL INFORMATION TO BE FURNISHED WITH REPORTS FILED PURSUANT TO
SECTION 15(d) OF THE ACT BY REGISTRANTS WHICH HAVE NOT REGISTERED SECURITIES
PURSUANT TO SECTION 12 OF THE ACT.

     No such annual report, proxy statement, form of proxy or other soliciting
material has been sent to Certificateholders. See the Relief Letters.

                                       8

<PAGE>

                                   SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this Report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                  CWABS, INC.,
                                  ASSET-BACKED CERTIFICATES, SERIES 2002-S1

                                  By:      Countrywide Home Loans Servicing LP,
                                           as Master Servicer*

                                  By:      Countrywide GP, Inc.


                                  By:      /s/ Joseph M. Candelario
                                           ---------------------------
                                           Name:  Joseph M. Candelario
                                           Title:    First Vice President

                                  Date:    March 27, 2003









------------
*    This Report is being filed by the Master Servicer on behalf of the Trust
     Fund. The Trust Fund does not have any officers or directors.

                                       9

<PAGE>

                                  CERTIFICATION

          I, Richard DeLeo, certify that:

          1. I have reviewed this annual report on Form 10-K, and all reports on
          Form 8-K containing distribution and servicing reports filed in
          respect of periods included in the year covered by this annual report,
          of CWABS, Inc., Asset-Backed Certificates, Series 2002-S1;

          2. Based on my knowledge, the information in these reports, taken as a
          whole, does not contain any untrue statement of a material fact or
          omit to state a material fact necessary to make the statements made,
          in light of the circumstances under which such statements were made,
          not misleading as of the last day of the period covered by this annual
          report;

          3. Based on my knowledge, the distribution or servicing information
          required to be provided to the trustee by the master servicer under
          the pooling and servicing, or similar, agreement, for inclusion in
          these reports is included in these reports;

          4. I am responsible for reviewing the activities performed by the
          master servicer under the pooling and servicing, or similar, agreement
          and based upon my knowledge and the annual compliance review required
          under that agreement, and except as disclosed in the reports, the
          master servicer has fulfilled its obligations under that agreement;
          and

          5. The reports disclose all significant deficiencies relating to the
          master servicer's compliance with the minimum servicing standards
          based upon the report provided by an independent public accountant,
          after conducting a review in compliance with the Uniform Single
          Attestation Program for Mortgage Bankers or similar procedure, as set
          forth in the pooling and servicing, or similar, agreement, that is
          included in these reports.

          In giving the certifications above, I have reasonably relied on
          information provided to me by the following unaffiliated parties: The
          Bank of New York, as Trustee.


          Date: March 27, 2003


                                             /s/ Richard De Leo
                                             ------------------
                                             Richard De Leo
                                             Managing Director



                                       10

<PAGE>



     SUPPLEMENTAL INFORMATION TO BE FURNISHED WITH REPORTS FILED PURSUANT TO
SECTION 15(d) OF THE ACT BY REGISTRANTS WHICH HAVE NOT REGISTERED SECURITIES
PURSUANT TO SECTION 12 OF THE ACT.

     No such annual report, proxy statement, form of proxy or other soliciting
material has been sent to Certificateholders. See the Relief Letters.


                                       11

<PAGE>

                                  EXHIBIT INDEX


                                                                     Sequential
Exhibit   Document                                                   Page Number
-------   --------                                                   -----------

3(i)          Company's Certificate of Incorporation (Filed as an
              Exhibit to Registration Statement on Form S-3
              (File No. 33-11095))  *

3(ii)         Company's By-laws (Filed as an Exhibit to Registration
              Statement on Form S-3 (File No. 33-11095))  *

4             Pooling and Servicing Agreement (Filed as part of
              the Company's Current Report on Form 8-K filed on
              May 17, 2002)  *

99.1          Annual Statement of the Master Servicer.........................13

99.2          Annual Report of the Firm of Accountants........................15













----------
*    Incorporated herein by reference.

                                       12