<ARTICLE> 5 <MULTIPLIER> 1,000 <CURRENCY> US DOLLAR <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> DEC-31-1997 <EXCHANGE-RATE> 1,000 <CASH> 70,358 <SECURITIES> 369,730 <RECEIVABLES> 88,447 <ALLOWANCES> 1,645 <INVENTORY> 22,959 <CURRENT-ASSETS> 596,066 <PP&E> 240,513 <DEPRECIATION> 66,021 <TOTAL-ASSETS> 813,825 <CURRENT-LIABILITIES> 123,883 <BONDS> 61,846 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 741 <OTHER-SE> 535,552 <TOTAL-LIABILITY-AND-EQUITY> 813,825 <SALES> 239,988 <TOTAL-REVENUES> 434,044 <CGS> 50,188 <TOTAL-COSTS> 285,076 <OTHER-EXPENSES> (711) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 5,309 <INCOME-PRETAX> 148,968 <INCOME-TAX> 59,801 <INCOME-CONTINUING> 89,167 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 89,167 <EPS-PRIMARY> $1.21 <EPS-DILUTED> $1.17