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<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from Consolidated
Balance Sheet and Consolidated Statement of Income and is qualified in its
entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C> <C> <C> <C> <C>
<PERIOD-TYPE> 12-MOS 3-MOS 3-MOS 6-MOS 6-MOS
<FISCAL-YEAR-END> MAR-31-2000 MAR-31-2001 MAR-31-2000 MAR-31-2001 MAR-31-2000
<PERIOD-START> APR-01-1999 JUL-01-2000 JUL-01-1999 APR-01-2000 APR-01-1999
<PERIOD-END> MAR-31-2000 SEP-30-2000 SEP-30-1999 SEP-30-2000 SEP-30-1999
<CASH> 48,515 37,204 0 0 0
<SECURITIES> 21,807 17,785 0 0 0
<RECEIVABLES> 11,144 14,046 0 0 0
<ALLOWANCES> 754 809 0 0 0
<INVENTORY> 3,131 3,634 0 0 0
<CURRENT-ASSETS> 90,492 77,176 0 0 0
<PP&E> 12,603 15,736 0 0 0
<DEPRECIATION> 6,946 8,849 0 0 0
<TOTAL-ASSETS> 96,748 135,157 0 0 0
<CURRENT-LIABILITIES> 15,626 17,975 0 0 0
<BONDS> 0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
<COMMON> 31 33 0 0 0
<OTHER-SE> 41,424 73,939 0 0 0
<TOTAL-LIABILITY-AND-EQUITY> 96,748 135,157 0 0 0
<SALES> 0 20,790 13,541 38,551 26,355
<TOTAL-REVENUES> 0 28,819 20,304 53,988 39,375
<CGS> 0 7,262 5,086 13,356 9,900
<TOTAL-COSTS> 0 8,119 5,483 14,807 10,701
<OTHER-EXPENSES> 0 19,872 10,331 32,766 19,558
<LOSS-PROVISION> 0 0 0 0 0
<INTEREST-EXPENSE> 0 0 0 0 0
<INCOME-PRETAX> 0 828 4,490 6,415 9,116
<INCOME-TAX> 0 2,697 1,800 5,014 3,564
<INCOME-CONTINUING> 0 (761) 3,194 3,543 6,328
<DISCONTINUED> 0 0 0 0 0
<EXTRAORDINARY> 0 0 0 0 0
<CHANGES> 0 0 0 0 0
<NET-INCOME> 0 (761) 3,194 3,543 6,328
<EPS-BASIC> 0 (0.03) 0.16 0.13 0.36
<EPS-DILUTED> 0 (0.03) 0.12 0.12 0.25
</TABLE>
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