<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM RESTATED
FINANCIAL DATA SCHEDULE FOR NOVEMBER 30, 1998
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> NOV-30-1998
<PERIOD-START> DEC-01-1997
<PERIOD-END> NOV-30-1998
<CASH> 7,849
<SECURITIES> 25,185
<RECEIVABLES> 14,525
<ALLOWANCES> 4,289
<INVENTORY> 1,691
<CURRENT-ASSETS> 46,140
<PP&E> 20,860
<DEPRECIATION> 12,364
<TOTAL-ASSETS> 54,949
<CURRENT-LIABILITIES> 29,638
<BONDS> 0
0
0
<COMMON> 113
<OTHER-SE> 25,198
<TOTAL-LIABILITY-AND-EQUITY> 54,949
<SALES> 50,160
<TOTAL-REVENUES> 57,351
<CGS> 27,262
<TOTAL-COSTS> 44,002
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> (397)
<INCOME-TAX> (1,000)
<INCOME-CONTINUING> 603
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 603
<EPS-BASIC> 0.05
<EPS-DILUTED> 0.05
</TABLE>