<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-END> JUN-30-1996 <CASH> 222,788 <SECURITIES> 490,909 <RECEIVABLES> 243,954 <ALLOWANCES> 2,956 <INVENTORY> 123,894 <CURRENT-ASSETS> 1,134,583 <PP&E> 1,278,451 <DEPRECIATION> 539,584 <TOTAL-ASSETS> 1,960,268 <CURRENT-LIABILITIES> 346,121 <BONDS> 143,750 <COMMON> 1,292 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 1,265,371 <TOTAL-LIABILITY-AND-EQUITY> 1,960,268 <SALES> 636,711 <TOTAL-REVENUES> 636,711 <CGS> 353,303 <TOTAL-COSTS> 353,303 <OTHER-EXPENSES> 168,999 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 6,594 <INCOME-PRETAX> 123,756 <INCOME-TAX> 34,658 <INCOME-CONTINUING> 88,780 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 88,780 <EPS-PRIMARY> 0.67 <EPS-DILUTED> 0.64