<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>