<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> US DOLLARS
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               MAR-31-1999
<EXCHANGE-RATE>                                      1
<CASH>                                          97,262
<SECURITIES>                                   111,482
<RECEIVABLES>                                   35,610
<ALLOWANCES>                                       703
<INVENTORY>                                      4,790
<CURRENT-ASSETS>                               256,809
<PP&E>                                          47,202
<DEPRECIATION>                                (16,290)
<TOTAL-ASSETS>                                 321,052
<CURRENT-LIABILITIES>                           65,151
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           418
<OTHER-SE>                                     253,029
<TOTAL-LIABILITY-AND-EQUITY>                   321,052
<SALES>                                         48,672
<TOTAL-REVENUES>                                48,672
<CGS>                                           11,437
<TOTAL-COSTS>                                   32,105
<OTHER-EXPENSES>                                 6,550<F1>
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 74,754
<INCOME-TAX>                                    33,832
<INCOME-CONTINUING>                             40,989
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    40,989
<EPS-PRIMARY>                                     1.03
<EPS-DILUTED>                                     0.97
<FN>
<F1>OTHER EXPENSES REFERS TO EXPENSES OF $6,550 INCURRED IN CONJUNCTION WITH
CERTAIN EXIT COSTS INCURRED IN 1999.
</FN>