<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEET AND CONSOLIDATED STATEMENTS OF INCOME AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> MAY-31-2001
<PERIOD-START> JUN-01-2000
<PERIOD-END> AUG-31-2000
<CASH> 1,169,000
<SECURITIES> 5,347,000
<RECEIVABLES> 6,359,000
<ALLOWANCES> 471,000
<INVENTORY> 5,779,000
<CURRENT-ASSETS> 19,020,000
<PP&E> 7,005,000
<DEPRECIATION> 4,404,000
<TOTAL-ASSETS> 29,337,000
<CURRENT-LIABILITIES> 3,030,000
<BONDS> 0
0
0
<COMMON> 910,000
<OTHER-SE> 25,022,000
<TOTAL-LIABILITY-AND-EQUITY> 29,337,000
<SALES> 8,124,000
<TOTAL-REVENUES> 8,304,000
<CGS> 4,128,000
<TOTAL-COSTS> 7,322,000
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 10,000
<INCOME-PRETAX> 972,000
<INCOME-TAX> 300,000
<INCOME-CONTINUING> 672,000
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 672,000
<EPS-BASIC> 0.12
<EPS-DILUTED> 0.12
</TABLE>