<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONSOLIDATED BALANCE SHEET AND THE CONSOLIDATED STATEMENT OF OPERATIONS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> SEP-30-1998 <CASH> 16,714 <SECURITIES> 34,192 <RECEIVABLES> 36,003 <ALLOWANCES> 0 <INVENTORY> 6,034 <CURRENT-ASSETS> 96,099 <PP&E> 26,269 <DEPRECIATION> 18,126 <TOTAL-ASSETS> 114,268 <CURRENT-LIABILITIES> 11,299 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 485 <OTHER-SE> 98,483 <TOTAL-LIABILITY-AND-EQUITY> 114,268 <SALES> 50,554 <TOTAL-REVENUES> 55,653 <CGS> 7,733 <TOTAL-COSTS> 37,175 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 65 <INCOME-PRETAX> 18,478 <INCOME-TAX> 5,543 <INCOME-CONTINUING> 12,935 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 12,935 <EPS-PRIMARY> 0.27 <EPS-DILUTED> 0.26