<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS INCLUDED IN THE COMPANY'S FORM 10-Q FOR THE SIX MONTHS
ENDED JUNE 30, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          29,261
<SECURITIES>                                    11,613
<RECEIVABLES>                                   55,766
<ALLOWANCES>                                     2,602
<INVENTORY>                                          0
<CURRENT-ASSETS>                               106,222
<PP&E>                                          22,665
<DEPRECIATION>                                  12,171
<TOTAL-ASSETS>                                 136,696
<CURRENT-LIABILITIES>                           40,413
<BONDS>                                          1,088
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        87,653
<OTHER-SE>                                       6,512
<TOTAL-LIABILITY-AND-EQUITY>                   136,696
<SALES>                                         43,104
<TOTAL-REVENUES>                                81,610
<CGS>                                            8,222
<TOTAL-COSTS>                                   37,226
<OTHER-EXPENSES>                                38,851
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 200
<INCOME-PRETAX>                                  6,177
<INCOME-TAX>                                     2,255
<INCOME-CONTINUING>                              3,922
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,922
<EPS-PRIMARY>                                     0.28
<EPS-DILUTED>                                     0.26