<ARTICLE> 5 <MULTIPLIER> 1000 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> DEC-31-1999 <CASH> 144,296 <SECURITIES> 175,357 <RECEIVABLES> 74,850 <ALLOWANCES> 10,974 <INVENTORY> 19,335 <CURRENT-ASSETS> 445,627 <PP&E> 88,349 <DEPRECIATION> 52,056 <TOTAL-ASSETS> 496,309 <CURRENT-LIABILITIES> 78,177 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 323,756 <OTHER-SE> 75,036 <TOTAL-LIABILITY-AND-EQUITY> 496,309 <SALES> 407,648 <TOTAL-REVENUES> 407,648 <CGS> 181,891 <TOTAL-COSTS> 181,891 <OTHER-EXPENSES> 153,803 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 1,611 <INCOME-PRETAX> 82,410 <INCOME-TAX> 24,723 <INCOME-CONTINUING> 82,410 <DISCONTINUED> 0 <EXTRAORDINARY> 33 <CHANGES> 0 <NET-INCOME> 57,278 <EPS-BASIC> 1.44 <EPS-DILUTED> 1.30