<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED CONSOLIDATED BALANCE SHEETS AND CONSOLIDATED STATEMENTS OF INCOME AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   3-MOS
<FISCAL-YEAR-END>                          JUL-31-1997             JUL-31-1997
<PERIOD-START>                             AUG-01-1996             FEB-01-1996
<PERIOD-END>                               APR-30-1997             APR-30-1997
<CASH>                                           1,059                   1,059
<SECURITIES>                                     1,699                   1,699
<RECEIVABLES>                                   15,881                  15,881
<ALLOWANCES>                                       514                     514
<INVENTORY>                                      9,140                   9,140
<CURRENT-ASSETS>                                30,793                  30,793
<PP&E>                                           6,041                   6,041
<DEPRECIATION>                                   4,024                   4,024
<TOTAL-ASSETS>                                  48,468                  48,468
<CURRENT-LIABILITIES>                            4,673                   4,673
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                             9                       9
<OTHER-SE>                                      43,764                  43,764
<TOTAL-LIABILITY-AND-EQUITY>                    48,468                  48,468
<SALES>                                         40,688                  14,567
<TOTAL-REVENUES>                                40,688                  14,567
<CGS>                                           34,652                  12,841
<TOTAL-COSTS>                                   34,652                  12,841
<OTHER-EXPENSES>                                 8,364                   2,598
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                  38                      16 
<INCOME-PRETAX>                                (1,681)                   (648) 
<INCOME-TAX>                                     (772)                   (268) 
<INCOME-CONTINUING>                              (909)                   (380) 
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0  
<CHANGES>                                            0                       0  
<NET-INCOME>                                     (909)                   (380)  
<EPS-PRIMARY>                                   (0.15)                  (0.06)  
<EPS-DILUTED>                                   (0.15)                  (0.06)
                                            

</TABLE>