<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> MAR-31-1999 <CASH> 32,568 <SECURITIES> 150,531 <RECEIVABLES> 129,361 <ALLOWANCES> 2,617 <INVENTORY> 4,420 <CURRENT-ASSETS> 336,323 <PP&E> 195,957 <DEPRECIATION> 102,259 <TOTAL-ASSETS> 726,023 <CURRENT-LIABILITIES> 118,952 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 76,076 <OTHER-SE> 505,625 <TOTAL-LIABILITY-AND-EQUITY> 726,023 <SALES> 188,128 <TOTAL-REVENUES> 188,128 <CGS> 140,260 <TOTAL-COSTS> 164,027 <OTHER-EXPENSES> (1,998) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 41 <INCOME-PRETAX> 26,058 <INCOME-TAX> 10,724 <INCOME-CONTINUING> 15,334 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 15,334 <EPS-PRIMARY> .22 <EPS-DILUTED> .21