<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> SEP-30-1998 <CASH> 134,713 <SECURITIES> 93,269 <RECEIVABLES> 287,154 <ALLOWANCES> 3,152 <INVENTORY> 183,946 <CURRENT-ASSETS> 791,507 <PP&E> 2,108,808 <DEPRECIATION> 698,658 <TOTAL-ASSETS> 2,658,602 <CURRENT-LIABILITIES> 614,523 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 1,405 <OTHER-SE> 1,439,753 <TOTAL-LIABILITY-AND-EQUITY> 2,658,602 <SALES> 1,045,316 <TOTAL-REVENUES> 1,045,316 <CGS> 579,685 <TOTAL-COSTS> 579,685 <OTHER-EXPENSES> 590,828 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> (5,917) <INCOME-PRETAX> (138,351) <INCOME-TAX> 4,294 <INCOME-CONTINUING> (142,645) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (142,645) <EPS-PRIMARY> (1.02) <EPS-DILUTED> (1.02)