<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                          84,105
<SECURITIES>                                         0
<RECEIVABLES>                                   28,260
<ALLOWANCES>                                         0
<INVENTORY>                                        535
<CURRENT-ASSETS>                               119,050
<PP&E>                                          29,069
<DEPRECIATION>                                  18,024
<TOTAL-ASSETS>                                 136,527
<CURRENT-LIABILITIES>                           46,210
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        55,529
<OTHER-SE>                                      34,788
<TOTAL-LIABILITY-AND-EQUITY>                   136,527
<SALES>                                         72,623
<TOTAL-REVENUES>                                72,623
<CGS>                                           14,453
<TOTAL-COSTS>                                   14,453
<OTHER-EXPENSES>                                61,449
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,760
<INCOME-PRETAX>                                (2,028)
<INCOME-TAX>                                     (832)
<INCOME-CONTINUING>                            (1,196)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (1,196)
<EPS-PRIMARY>                                   (0.13)
<EPS-DILUTED>                                   (0.13)