<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S BALANCE SHEETS AND CONSOLIDATED STATEMENTS OF INCOME AND IS
QUALIFIED IN ITS ENTIRETY TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          JUL-31-2000
<PERIOD-START>                             FEB-01-2000
<PERIOD-END>                               APR-30-2000
<EXCHANGE-RATE>                                      1
<CASH>                                           15993
<SECURITIES>                                     88173
<RECEIVABLES>                                    58064
<ALLOWANCES>                                      1710
<INVENTORY>                                      69418
<CURRENT-ASSETS>                                241519
<PP&E>                                          177057
<DEPRECIATION>                                  112734
<TOTAL-ASSETS>                                  320951
<CURRENT-LIABILITIES>                            35927
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           699
<OTHER-SE>                                      272553
<TOTAL-LIABILITY-AND-EQUITY>                    320951
<SALES>                                         194464
<TOTAL-REVENUES>                                208451
<CGS>                                           124589
<TOTAL-COSTS>                                   129085
<OTHER-EXPENSES>                                 64448
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 234
<INCOME-PRETAX>                                  12738
<INCOME-TAX>                                      3950
<INCOME-CONTINUING>                               8703
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                      8703
<EPS-BASIC>                                       0.68
<EPS-DILUTED>                                     0.68