<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, 1997 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-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> MAR-31-1997 <CASH> 58,820 <SECURITIES> 68,086 <RECEIVABLES> 64,886 <ALLOWANCES> 1,614 <INVENTORY> 13,311 <CURRENT-ASSETS> 216,742 <PP&E> 101,557 <DEPRECIATION> 48,232 <TOTAL-ASSETS> 301,676 <CURRENT-LIABILITIES> 67,250 <BONDS> 4,500 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 129,211 <OTHER-SE> 100,715 <TOTAL-LIABILITY-AND-EQUITY> 301,676 <SALES> 67,552 <TOTAL-REVENUES> 91,618 <CGS> 23,205 <TOTAL-COSTS> 40,431 <OTHER-EXPENSES> 34,346 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 27 <INCOME-PRETAX> 18,254 <INCOME-TAX> 7,028 <INCOME-CONTINUING> 11,226 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 11,226 <EPS-PRIMARY> 0.21 <EPS-DILUTED> 0.21