<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM (A) THE CONSOLIDATED BALANCE SHEET AND CONSOLIDATED STATEMENT OF INCOME INCLUDED IN THE COMPANY'S FORM 10-Q FOR THE PERIOD ENDING MARCH 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH (B) FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> MAR-31-1998 <CASH> 59,563 <SECURITIES> 87,243 <RECEIVABLES> 96,777 <ALLOWANCES> 1,911 <INVENTORY> 13,265 <CURRENT-ASSETS> 271,089 <PP&E> 128,702 <DEPRECIATION> 66,541 <TOTAL-ASSETS> 377,410 <CURRENT-LIABILITIES> 86,612 <BONDS> 6,607 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 147,897 <OTHER-SE> 136,294 <TOTAL-LIABILITY-AND-EQUITY> 377,410 <SALES> 77,332 <TOTAL-REVENUES> 113,457 <CGS> 24,372 <TOTAL-COSTS> 48,542 <OTHER-EXPENSES> 43,914 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 30 <INCOME-PRETAX> 22,414 <INCOME-TAX> 8,517 <INCOME-CONTINUING> 0 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 13,897 <EPS-PRIMARY> 0.28 <EPS-DILUTED> 0.26