<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AND THE CONSOLIDATED STATEMENT OF OPERATION AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> SEP-30-2000
<CASH> 16,689
<SECURITIES> 89,325
<RECEIVABLES> 43,038
<ALLOWANCES> 0
<INVENTORY> 10,157
<CURRENT-ASSETS> 163,718
<PP&E> 45,193
<DEPRECIATION> 21,448
<TOTAL-ASSETS> 195,556
<CURRENT-LIABILITIES> 18,507
<BONDS> 0
0
0
<COMMON> 547
<OTHER-SE> 161,567
<TOTAL-LIABILITY-AND-EQUITY> 195,556
<SALES> 44,795
<TOTAL-REVENUES> 63,273
<CGS> 7,097
<TOTAL-COSTS> 47,831
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 91
<INCOME-PRETAX> 15,349
<INCOME-TAX> 4,115
<INCOME-CONTINUING> 11,234
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 11,234
<EPS-BASIC> 0.21
<EPS-DILUTED> 0.20
</TABLE>