<ARTICLE>  5
<LEGEND>   This schedule contains summary financial information extracted
           from the Balance Sheets and Statements of Income included in the
           Company's Form 10-K for the year ended May 31, 1998 and is
           qualified in its entirety by reference to such Financial Statements.
</LEGEND> 
<MULTIPLIER>1000
       
                                                           
<FISCAL-YEAR-END>                           May-31-1998 May-31-1997 May-31-1996
<PERIOD-START>                              Jun-01-1997 Jun-01-1996 Jun-01-1995
<PERIOD-END>                                May-31-1998 May-31-1997 May-31-1996
<PERIOD-TYPE>                               12-MOS      12-MOS      12-MOS
<CASH>                                          6,748       1,176       2,481
<SECURITIES>                                   16,579       1,614           0
<RECEIVABLES>                                   7,442       7,785      10,806
<ALLOWANCES>                                      260         270         241
<INVENTORY>                                    11,942      10,498       7,921
<CURRENT-ASSETS>                               43,858      21,858      21,226
<PP&E>                                          7,902       9,547       9,449
<DEPRECIATION>                                  6,361       7,856       8,067
<TOTAL-ASSETS>                                 47,105      24,389      23,749
<CURRENT-LIABILITIES>                           6,973      13,963      16,427
<BONDS>                                             0           0           0
<PREFERRED-MANDATORY>                               0           0           0
<PREFERRED>                                         0           0           0
<COMMON>                                           69          43       8,137
<OTHER-SE>                                     39,895      10,027      (1,348)
<TOTAL-LIABILITY-AND-EQUITY>                   47,105      24,389      23,749
<SALES>                                        40,805      42,020      33,234
<TOTAL-REVENUES>                               40,805      42,020      33,234
<CGS>                                          24,359      25,715      19,942
<TOTAL-COSTS>                                  24,359      25,715      19,942
<OTHER-EXPENSES>                               12,247      12,621      10,756
<LOSS-PROVISION>                                    0           0           0
<INTEREST-EXPENSE>                               (904)        577         446
<INCOME-PRETAX>                                 4,739       2,542       1,531
<INCOME-TAX>                                    2,334        (773)        130
<INCOME-CONTINUING>                             2,405       3,315       1,400
<DISCONTINUED>                                      0           0           0
<EXTRAORDINARY>                                     0           0           0
<CHANGES>                                           0           0           0
<NET-INCOME>                                    2,405       3,315       1,400
<EPS-PRIMARY>                                   $0.38       $0.77       $0.33
<EPS-DILUTED>                                   $0.36       $0.74       $0.32