<ARTICLE> 5 <MULTIPLIER> 1000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> SEP-30-1998 <CASH> 94,158 <SECURITIES> 410,602 <RECEIVABLES> 91,817 <ALLOWANCES> 1,642 <INVENTORY> 33,548 <CURRENT-ASSETS> 671,409 <PP&E> 259,938 <DEPRECIATION> 81,260 <TOTAL-ASSETS> 888,551 <CURRENT-LIABILITIES> 131,571 <BONDS> 58,596 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 741 <OTHER-SE> 668,061 <TOTAL-LIABILITY-AND-EQUITY> 888,551 <SALES> 270,665 <TOTAL-REVENUES> 410,152 <CGS> 51,557 <TOTAL-COSTS> 263,508 <OTHER-EXPENSES> 2,118 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 4,709 <INCOME-PRETAX> 146,644 <INCOME-TAX> 49,859 <INCOME-CONTINUING> 96,785 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 96,785 <EPS-PRIMARY> 1.31 <EPS-DILUTED> 1.26