<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> MAR-31-1999 <CASH> 57,238 <SECURITIES> 149,971 <RECEIVABLES> 67,496 <ALLOWANCES> 3,045 <INVENTORY> 36,548 <CURRENT-ASSETS> 316,510 <PP&E> 62,004 <DEPRECIATION> 26,061 <TOTAL-ASSETS> 361,411 <CURRENT-LIABILITIES> 36,739 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 2,525 <OTHER-SE> 322,147 <TOTAL-LIABILITY-AND-EQUITY> 361,411 <SALES> 75,403 <TOTAL-REVENUES> 75,403 <CGS> 0 <TOTAL-COSTS> 30,277 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 18,380 <INCOME-TAX> 6,546 <INCOME-CONTINUING> 11,834 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 11,834 <EPS-PRIMARY> 0.54 <EPS-DILUTED> 0.53