<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED INTERIM FINANCIAL STATEMENTS AS OF AND FOR THE THREE AND NINE MONTH
PERIODS ENDED FEBRUARY 28, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   3-MOS
<FISCAL-YEAR-END>                          MAY-31-1999             MAY-31-1999
<PERIOD-START>                             JUN-01-1998             DEC-01-1999
<PERIOD-END>                               FEB-28-1999             FEB-28-1999
<CASH>                                         617,380                       0
<SECURITIES>                                         0                       0
<RECEIVABLES>                                  143,844                       0
<ALLOWANCES>                                         0                       0
<INVENTORY>                                    288,809                       0
<CURRENT-ASSETS>                             1,069,869                       0
<PP&E>                                         698,639                       0
<DEPRECIATION>                               (671,587)                       0
<TOTAL-ASSETS>                               1,127,734                       0
<CURRENT-LIABILITIES>                          186,288                       0
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                     2,383,385                       0
<OTHER-SE>                                 (1,441,939)                       0
<TOTAL-LIABILITY-AND-EQUITY>                 1,127,734                       0
<SALES>                                      1,061,556                 368,105
<TOTAL-REVENUES>                             1,079,725                 374,224
<CGS>                                          665,198                 270,722
<TOTAL-COSTS>                                1,254,898                 467,950
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                   0                       0
<INCOME-PRETAX>                              (175,173)                (93,726)
<INCOME-TAX>                                       800                       0
<INCOME-CONTINUING>                          (175,973)                (93,726)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                 (175,973)                (93,726)
<EPS-PRIMARY>                                    (.12)                   (.07)
<EPS-DILUTED>                                    (.12)                   (.07)
        

</TABLE>