<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> JUN-30-1999 <CASH> 190,530 <SECURITIES> 154,613 <RECEIVABLES> 338,745 <ALLOWANCES> 4,914 <INVENTORY> 191,485 <CURRENT-ASSETS> 977,188 <PP&E> 2,135,410 <DEPRECIATION> 888,869 <TOTAL-ASSETS> 2,755,715 <CURRENT-LIABILITIES> 458,786 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 1,460 <OTHER-SE> 1,484,623 <TOTAL-LIABILITY-AND-EQUITY> 2,755,715 <SALES> 964,629 <TOTAL-REVENUES> 964,629 <CGS> 616,289 <TOTAL-COSTS> 616,289 <OTHER-EXPENSES> 309,334 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> (20,200) <INCOME-PRETAX> 23,001 <INCOME-TAX> 9,160 <INCOME-CONTINUING> 13,841 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> (91,774) <NET-INCOME> (77,933) <EPS-BASIC> (0.54) <EPS-DILUTED> (0.52)