<ARTICLE> 5 <MULTIPLIER> 1000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> JUN-30-1998 <CASH> 194,498 <SECURITIES> 2,306 <RECEIVABLES> 34,050 <ALLOWANCES> 0 <INVENTORY> 20,412 <CURRENT-ASSETS> 281,679 <PP&E> 64,579 <DEPRECIATION> 38,502 <TOTAL-ASSETS> 334,555 <CURRENT-LIABILITIES> 63,670 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 210,303 <OTHER-SE> (7,428) <TOTAL-LIABILITY-AND-EQUITY> 334,555 <SALES> 169,835 <TOTAL-REVENUES> 169,835 <CGS> 78,011 <TOTAL-COSTS> 78,011 <OTHER-EXPENSES> 64,816 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 27,919 <INCOME-TAX> 8,379 <INCOME-CONTINUING> 19,709 <DISCONTINUED> 0 <EXTRAORDINARY> 1,138 <CHANGES> 0 <NET-INCOME> 20,847 <EPS-PRIMARY> .56 <EPS-DILUTED> .54