<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> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> JUN-30-1999 <CASH> 8,410 <SECURITIES> 65,604 <RECEIVABLES> 46,220 <ALLOWANCES> 0 <INVENTORY> 5,702 <CURRENT-ASSETS> 129,071 <PP&E> 36,242 <DEPRECIATION> 19,179 <TOTAL-ASSETS> 152,731 <CURRENT-LIABILITIES> 16,288 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 522 <OTHER-SE> 131,997 <TOTAL-LIABILITY-AND-EQUITY> 152,731 <SALES> 19,381 <TOTAL-REVENUES> 22,880 <CGS> 3,868 <TOTAL-COSTS> 15,619 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 57 <INCOME-PRETAX> 7,204 <INCOME-TAX> 2,104 <INCOME-CONTINUING> 5,100 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 5,100 <EPS-BASIC> 0.10 <EPS-DILUTED> 0.10