<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                          15,091
<SECURITIES>                                    40,690
<RECEIVABLES>                                   14,212
<ALLOWANCES>                                     1,289
<INVENTORY>                                          0
<CURRENT-ASSETS>                                82,506
<PP&E>                                          19,934
<DEPRECIATION>                                  12,037
<TOTAL-ASSETS>                                 117,949
<CURRENT-LIABILITIES>                           20,381
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           440
<OTHER-SE>                                      96,674
<TOTAL-LIABILITY-AND-EQUITY>                   117,949
<SALES>                                         17,313
<TOTAL-REVENUES>                                17,313
<CGS>                                              991
<TOTAL-COSTS>                                      991
<OTHER-EXPENSES>                                 5,017
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                    730
<INCOME-TAX>                                       199
<INCOME-CONTINUING>                                531
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       531
<EPS-PRIMARY>                                      .01<F1>
<EPS-DILUTED>                                      .01
<FN>
<F1>FOR PURPOSES OF THIS EXHIBIT, PRIMARY MEANS BASIC.
</FN>