<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 JUNE 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH (B) FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1000 <CURRENCY> USD <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <EXCHANGE-RATE> 1 <CASH> 76,751 <SECURITIES> 57,438 <RECEIVABLES> 69,242 <ALLOWANCES> 1,618 <INVENTORY> 11,403 <CURRENT-ASSETS> 227,064 <PP&E> 109,499 <DEPRECIATION> 52,978 <TOTAL-ASSETS> 314,067 <CURRENT-LIABILITIES> 64,526 <BONDS> 4,500 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 132,546 <OTHER-SE> 112,495 <TOTAL-LIABILITY-AND-EQUITY> 314,067 <SALES> 133,484 <TOTAL-REVENUES> 185,160 <CGS> 43,684 <TOTAL-COSTS> 80,583 <OTHER-EXPENSES> 70,716 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> (4,841) <INCOME-PRETAX> 38,702 <INCOME-TAX> 14,900 <INCOME-CONTINUING> 23,802 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 23,802 <EPS-PRIMARY> 0.46 <EPS-DILUTED> 0.46