<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE 1995
ANNUAL REPORT FOR THE YEAR ENDED APRIL 30, 1995 AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          APR-30-1995
<PERIOD-START>                             MAY-01-1994
<PERIOD-END>                               APR-30-1995
<CASH>                                          13,050
<SECURITIES>                                     8,310
<RECEIVABLES>                                   16,583
<ALLOWANCES>                                       247
<INVENTORY>                                     11,731
<CURRENT-ASSETS>                                49,456
<PP&E>                                          66,714
<DEPRECIATION>                                  37,586
<TOTAL-ASSETS>                                  84,258
<CURRENT-LIABILITIES>                           10,860
<BONDS>                                              0
<COMMON>                                        11,623
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                    84,258
<SALES>                                        105,269
<TOTAL-REVENUES>                               105,269
<CGS>                                           51,994
<TOTAL-COSTS>                                   51,994
<OTHER-EXPENSES>                                39,830
<LOSS-PROVISION>                                    60
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 14,045
<INCOME-TAX>                                     4,775
<INCOME-CONTINUING>                              9,270
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     9,270
<EPS-PRIMARY>                                      .81
<EPS-DILUTED>                                      .81