SECURITIES AND EXCHANGE COMMISSION

                             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 (Date of earliest event reported) May 13, 1997



                      TRANSACTION SYSTEMS ARCHITECTS, INC.
             (Exact name of registrant as specified in its charter)



      DELAWARE                        0-25346                      47-0772104
  (State or other jurisdiction      (Commission                  (IRS Employer
   of incorporation)                 File Number)            Identification No.)



                  330 South 108th Avenue, Omaha, Nebraska 68154
               (Address of principal executive offices) (Zip Code)



       Registrant's telephone number, including area code: (402) 390-7600






                      TRANSACTION SYSTEMS ARCHITECTS, INC.
                                    FORM 8-K


Item 2.       Acquisition or Disposition of Assets.

     On May 13, 1997,  Transaction  Systems  Architects,  Inc.  (the  "Company")
acquired all of the  outstanding  securities of Regency Voice Systems,  Inc. and
related  entities  ("RVS"),  pursuant  to a  statutory  exchange  under  a Stock
Exchange  Agreement (the "Stock Exchange  Agreement") dated as of April 17, 1997
among the Company,  RVS, and the owners of RVS. Under the terms of the exchange,
the Company issued 1,615,383 shares of Class A Common Stock.

     RVS develops, markets, and supports financial software products and related
services  including  interactive  voice  response  and  PC-banking  products for
financial institutions.


Item 7.     Financial Statements and Exhibits.

(c)               Exhibits.

                  2.10             Stock Exchange Agreement dated April 17, 1997
                                   by and among the Company, Regency Voice
                                   Systems, Inc., Regency Interactive Services,
                                   Inc., Regency Voice Systems Investors, Ltd.,
                                   and their respective shareholders and
                                   partners.


SIGNATURES

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 hereunto duly authorized.

                                            TRANSACTION SYSTEMS ARCHITECTS, INC.


Dated:  May 20, 1997                         By:    /s/ Gregory J. Duman
                                                   -------------------------   
                                                        Gregory J. Duman
                                                      Chief Financial Officer
                                                   (Principal Financial Officer)



                                 



                                  EXHIBIT INDEX
 
Exhibit
                               Number Description

2.10                  Stock Exchange Agreement dated April 17, 1997 by and
                      among the Company, Regency Voice Systems, Inc., Regency
                      Interactive Services, Inc., Regency Voice Systems
                      Investors, Ltd., and their respective shareholders and
                      partners.