<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> SEP-30-1999 <CASH> 52,445 <SECURITIES> 0 <RECEIVABLES> 178,490 <ALLOWANCES> 0 <INVENTORY> 101,162 <CURRENT-ASSETS> 354,585 <PP&E> 432,542 <DEPRECIATION> 206,918 <TOTAL-ASSETS> 793,843 <CURRENT-LIABILITIES> 290,407 <BONDS> 0 <COMMON> 56,988 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 107,993 <TOTAL-LIABILITY-AND-EQUITY> 793,843 <SALES> 188,635 <TOTAL-REVENUES> 188,635 <CGS> 86,920 <TOTAL-COSTS> 86,920 <OTHER-EXPENSES> 72,492 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 7,482 <INCOME-PRETAX> 22,412 <INCOME-TAX> 5,435 <INCOME-CONTINUING> 16,977 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 16,977 <EPS-BASIC> 0.38 <EPS-DILUTED> 0.37