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                                                                    EXHIBIT 2.4


                                 AMENDMENT NO. 3
                          TO RECAPITALIZATION AGREEMENT
                         Dated as of September 18, 1996

         TRW Inc., an Ohio corporation ("TRW"), TRW IS&S International, Inc., an
Ohio corporation ("International"), IS&S Holdings, Inc. (f/k/a Target Marketing
Services Inc.), a Delaware corporation ("Holdings"), TRW Hotel Company Inc., an
Ohio corporation ("Hotel"), TRW Microwave Inc., a California corporation
("Microwave"), Experian Information Solutions, Inc. (f/k/a TRW Environmental
Management Company), an Ohio corporation ("Operating Company" and together with
TRW, International, Holdings, Hotel and Microwave, the "TRW Parties"), and
Experian Corporation (f/k/a IS&S Acquisition Corp.), a Delaware corporation
("Experian"), hereby agree as follows:

               1. REFERENCE TO THE RECAPITALIZATION AGREEMENT; DEFINITIONS.
                  Reference is made to the Recapitalization Agreement dated as
                  of February 9, 1996, (as amended, the "Recapitalization
                  Agreement"), among the TRW Parties and Experian. Terms defined
                  in the Recapitalization Agreement and not otherwise defined
                  herein are used herein with the meanings so defined.

               2. AMENDMENTS TO RECAPITALIZATION AGREEMENT. Subject
                  to the terms and conditions hereof, effective on the date on
                  which the condition set forth in Section 3 of this Amendment
                  is satisfied (the "Effective Date of Amendment"), the
                  Recapitalization Agreement is hereby amended as follows:

                  a. AMENDMENT TO RECITALS.  Recital (D)(6) is hereby amended
                     and restated in its entirety to read as follows:

                                    Operating Company will purchase from
                                    Microwave and assume, and Microwave will
                                    sell, assign and transfer to Operating
                                    Company, the Acquired Assets (including,
                                    without limitation, the Mexican Investments,
                                    all TRW Hotel Shares and an assignment of
                                    Microwave's rights and interests under the
                                    trademark agreement between TRW and
                                    Microwave referred to above) and the Assumed
                                    Liabilities for an aggregate consideration
                                    of One Billion Ninety-Nine Million Nine
                                    Hundred Ninety-Nine Thousand Five Hundred
                                    Dollars ($1,099,999,500), consisting of a
                                    Seven Hundred Sixty-One Million Three
                                    Hundred Thousand Dollar ($761,300,000)
                                    demand promissory note payable by Operating
                                    Company to Microwave (the "Demand Note") and
                                    shares of stock in 
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                                    Operating Company with an aggregate issuance
                                    price of Three Hundred Thirty-Eight Million
                                    Six Hundred Ninety-Nine Thousand Five
                                    Hundred Dollars ($338,699,500).

                  b. AMENDMENT TO RECITALS. Recital (D)(7) is hereby amended and
                     restated in its entirety to read as follows:

                              TRW will transfer to Microwave, as a capital
                              contribution, all remaining outstanding shares of
                              stock of Operating Company, which are valued at 
                              Five Hundred Dollars ($500).

                  c. AMENDMENT TO RECITALS. Recital (D)(9) is hereby amended by
                     deleting the amount "Three Hundred Forty-Five Million
                     Dollars ($345,000,000)" and inserting in its place "Three
                     Hundred Thirty-Eight Million Seven Hundred Thousand Dollars
                     ($338,700,000)".

                  d. AMENDMENT TO RECITALS. Recital (D)(11) is hereby amended by
                     deleting the amount "Two Hundred Fifty-Five Million Dollars
                     ($255,000,000)" and inserting in its place "Two Hundred
                     Forty-Eight Million Seven Hundred Thousand Dollars
                     ($248,700,000)".

                  e. AMENDMENT TO RECITALS. Recital (D)(13) is hereby amended by
                     deleting the amount "Two Hundred Fifty-Five Million Dollars
                     ($255,000,000)" and inserting in its place "Two Hundred
                     Forty-Eight Million Seven Hundred Thousand Dollars
                     ($248,700,000)".

                  f. AMENDMENT TO RECITALS. Recital (D)(14) is hereby amended by
                     deleting the amount "Eight Hundred Five Million Dollars
                     ($805,000,000)" and inserting in its place "Eight Hundred
                     Eleven Million Three Hundred Thousand Dollars
                     ($811,300,000)".

                  g. AMENDMENT TO RECITALS. Recital (D)(15) is hereby amended by
                     deleting the amount "Seven Hundred Fifty-Five Million
                     Dollars ($755,000,000)" and inserting in its place "Seven
                     Hundred Sixty-One Million Three Hundred Thousand Dollars
                     ($761,300,000)".

                  h. AMENDMENT TO SECTION 2.1. Clause (f ) of Section 2.1 is
                     hereby amended by deleting the amount "Three Hundred
                     Forty-Five Million Dollars ($345,000,000)" and inserting in
                     its place "Three Hundred Thirty-Eight Million Six Hundred
                     Ninety-Nine Thousand Five Hundred Dollars ($338,699,500)".

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                  i. AMENDMENT TO SECTION 2.1. Clause (g) of Section 2.1 is
                     hereby amended and restated in its entirety to read as
                     follows:

                              TRW will transfer to Microwave, as a capital
                              contribution, all remaining outstanding shares of
                              stock of Operating Company, which are valued at
                              Five Hundred Dollars ($500).

                  j. AMENDMENT TO SECTION 2.1. Clause (i) of Section 2.1 is
                     hereby amended by deleting the amount "Three Hundred
                     Forty-Five Million Dollars ($345,000,000)" and inserting in
                     its place "Three Hundred Thirty-Eight Million Seven Hundred
                     Thousand Dollars ($338,700,000)".

                  k. AMENDMENT TO SECTION 2.6. Clause (e)(v) of Section 2.6 is
                     hereby amended by deleting the amount "Two Hundred
                     Fifty-Five Million Dollars ($255,000,000)" and inserting in
                     its place "Two Hundred Forty-Eight Million Seven Hundred
                     Thousand Dollars ($248,700,000)".

                  l. AMENDMENT TO SECTION 2.7. Clause (a) of Section 2.7 is
                     hereby amended and restated in its entirety to read as
                     follows: "the Seven Hundred Sixty-One Million Three Hundred
                     Thousand Dollar ($761,300,000) original principal amount of
                     the Demand Note plus".

                  m. AMENDMENT TO SECTION 2.7. Clause (b) of Section 2.7 is
                     hereby amended and restated in its entirety to read as
                     follows: "the Two Hundred Forty-Eight Million Seven Hundred
                     Thousand Dollars ($248,700,000) cash and Seventy-Five
                     Million Dollars ($75,000,000) value of the Senior
                     Convertible Preferred Stock constituting the Merger
                     Consideration, plus".

                  n. AMENDMENT TO SECTION 5.2. Clause (f) of Section 5.2 is
                     hereby amended by deleting the amount "Two Hundred
                     Fifty-Five Million Dollars ($255,000,000)" and inserting in
                     its place "Two Hundred Forty-Eight Million Seven Hundred
                     Thousand Dollars ($248,700,000)".

                  o. AMENDMENT TO SECTION 5.2. Clause (g) of Section 5.2 is
                     hereby amended by deleting the amount "Eight Hundred Five
                     Million Dollars ($805,000,000)" and inserting in its place
                     "Eight Hundred Eleven Million Three Hundred Thousand
                     Dollars ($811,300,000)".

                  p. AMENDMENT TO APPENDIX E-1. The Description of "Cash and
                     Cash Equivalents" -- "Closing - Excluded Assets" shall be
                     amended by inserting at the end of the second sentence
                     thereof the following: "except 

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                     the balances in the TRW REDI ESCROW BANK ACCOUNT - Wells 
                     Fargo Account No. 047-0041161 and the IS&S ORANGE COUNTY
                     EMPLOYEE ASSOC BANK ACCOUNT - Wells Fargo Account
                     No. 258508694".

                  q. AMENDMENT TO APPENDIX E-2. The Description of "Cash and
                     Cash Equivalents" -- "Closing - Excluded Assets" shall be
                     amended by inserting at the end of the second sentence
                     thereof the following: "except the balances in the TRW REDI
                     ESCROW BANK ACCOUNT - Wells Fargo Account No. 047-0041161
                     and the IS&S ORANGE COUNTY EMPLOYEE ASSOC BANK ACCOUNT -
                     Wells Fargo Account No. 258508694".

                  r. SUPPLEMENT TO APPENDIX E-1. For purposes of the audit to be
                     conducted pursuant to Section 2.8 of the Recapitalization
                     Agreement, the Supplemental Accounting Principles described
                     in Appendix E-1 shall be supplemented as follows: with
                     respect to accounts payable and accrual expenses, the
                     amounts attributable to the pre-Closing period and the
                     post-Closing period shall be based on actual usage to the
                     extent possible, and otherwise shall be based on TRW's
                     standard 5-4-4 closing calendar method of allocation.

                  s. SUPPLEMENT TO APPENDIX E-2. For purposes of the audit to be
                     conducted pursuant to Section 2.8 of the Recapitalization
                     Agreement, the Supplemental Accounting Principles described
                     in Appendix E-2 shall be supplemented as follows: with
                     respect to accounts payable and accrual expenses, the
                     amounts attributable to the pre-Closing period and the
                     post-Closing period shall be based on actual usage to the
                     extent possible, and otherwise shall be based on TRW's
                     standard 5-4-4 closing calendar method of allocation.

               3. CONDITIONS TO AMENDMENT. This Amendment shall become effective
                  upon the execution of this Amendment by each of the TRW
                  Parties and Experian.

               4. MISCELLANEOUS. Except to the extent specifically amended
                  hereby, the provisions of the Recapitalization Agreement shall
                  remain unmodified, and, subject to the conditions contained in
                  this Amendment, the Recapitalization Agreement is hereby
                  confirmed as being in full force and effect. This Amendment
                  may be executed in any number of counterparts which together
                  shall constitute one instrument, and shall be governed by and
                  construed in accordance with the laws of the State of New
                  York, without regard to the conflict of laws rules of any
                  jurisdictions.

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         In WITNESS WHEREOF, the parties have caused this Amendment to be
executed and delivered by their duly authorized officers as of the date first
above written.

                              EXPERIAN CORPORATION (f/k/a IS&S Acquisition
                                 Corp.)

                              By: /s/ Mark E. Nunnelly
                                 ---------------------------------
                                  Title: Vice President
                                         Mark E. Nunnelly

                              By: /s/ Scott M. Sperling
                                 ---------------------------------
                                  Title: Vice President
                                         Scott M. Sperling

                              TRW INC.

                              By: /s/ William Lawrence
                                 ---------------------------------
                                  Title: Executive Vice President
                                         William A. Lawrence

                              By: /s/ Martin A. Coyle
                                 ---------------------------------
                                  Title: Executive Vice President
                                         and Secretary
                                         Martin A. Coyle

                              TRW IS&S INTERNATIONAL, INC.


                              By: /s/ James C. Diggs
                                 ---------------------------------
                                  Title: Vice President
                                         James C. Diggs

                              TRW MICROWAVE INC.

                              By: /s/ Kathleen A. Weigand
                                 ---------------------------------
                                  Title: Vice President and Secretary
                                         Kathleen A. Weigand

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                              IS&S HOLDINGS, INC. (f/k/a Target Marketing
                              Services, Inc.)


                              By: /s/ David B. Goldston
                                 ---------------------------------
                                  Title: Assistant Secretary
                                         David B. Goldston

                              EXPERIAN INFORMATION SOLUTIONS, INC.


                              By: /s/ Mark E. Nunnelly
                                 ---------------------------------
                                  Title: Vice President
                                         Mark E. Nunnelly

                              TRW HOTEL COMPANY INC.


                              By: /s/ Jean M. Schmidt
                                 ---------------------------------
                                  Title: Assistant Secretary
                                  Jean M. Schmidt