<ARTICLE> 5
<CIK> 0000935036
<NAME> TRANSACTION SYSTEMS ARCHITECTS, INC.
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-2000
<PERIOD-START>                             OCT-01-1999
<PERIOD-END>                               SEP-30-2000
<CASH>                                          23,400
<SECURITIES>                                     8,106
<RECEIVABLES>                                  121,156
<ALLOWANCES>                                   (5,941)
<INVENTORY>                                          0
<CURRENT-ASSETS>                               173,773
<PP&E>                                          58,158
<DEPRECIATION>                                (38,544)
<TOTAL-ASSETS>                                 330,152
<CURRENT-LIABILITIES>                          105,267
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           165
<OTHER-SE>                                     210,195
<TOTAL-LIABILITY-AND-EQUITY>                   330,152
<SALES>                                        303,565
<TOTAL-REVENUES>                               303,565
<CGS>                                          116,648
<TOTAL-COSTS>                                  301,823
<OTHER-EXPENSES>                               (2,763)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 912
<INCOME-PRETAX>                                  3,593
<INCOME-TAX>                                     1,482
<INCOME-CONTINUING>                              2,111
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     2,111
<EPS-BASIC>                                       .007
<EPS-DILUTED>                                     .007