UNITED STATES

                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

                        Date of Report: October 26, 2004
                        (Date of earliest event reported)


             (Exact name of registrant as specified in its charter)

          Delaware                   0-25346                     47-0772104
(State or other jurisdiction       (Commission                (I.R.S. Employer
      of incorporation)            File Number)              Identification No.)

                             224 South 108th Avenue,
                              Omaha, Nebraska 68154
          (Address of principal executive offices, including zip code)

                                 (402) 334-5101
              (Registrant's telephone number, including area code)


Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

   __ Written communications pursuant to Rule 425 under the Securities Act 
      (17 CFR 230.425)

   __ Soliciting material pursuant to Rule 14a-12 under the Exchange Act 
      (17 CFR 240.14a-12)

   __ Pre-commencement communications pursuant to Rule 14d-2(b) under the 
      Exchange Act (17 CFR 240.14d-2(b))

   __ Pre-commencement communications pursuant to Rule 13e-4(c) under the 
      Exchange Act (17 CFR 240.13e-4(c))


Item 2.02.  Results of Operations and Financial Condition.

     On October 26, 2004, Transaction Systems Architects, Inc. issued a press
release announcing its results for the quarterly period and full fiscal year
ending September 30, 2004. A copy of this press release is attached hereto as
Exhibit 99.1.


     Pursuant to the requirements 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.

                                        TRANSACTION SYSTEMS ARCHITECTS, INC.

 Date: October 26, 2004                 By:       /s/ David R. Bankhead
                                                    David R. Bankhead
                                                  Senior Vice President,
                                           Chief Financial Officer and Treasurer

                                  EXHIBIT INDEX

       Number     Description

         99.1     Press Release, dated October 26, 2004.