<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE 10-K AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          APR-30-2000
<PERIOD-START>                             MAY-01-1999
<PERIOD-END>                               OCT-31-1999
<CASH>                                          26,355
<SECURITIES>                                         0
<RECEIVABLES>                                   11,398
<ALLOWANCES>                                     1,285
<INVENTORY>                                     11,439
<CURRENT-ASSETS>                                56,257
<PP&E>                                          44,097
<DEPRECIATION>                                  27,051
<TOTAL-ASSETS>                                  84,055
<CURRENT-LIABILITIES>                           13,884
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        56,680
<OTHER-SE>                                      69,674
<TOTAL-LIABILITY-AND-EQUITY>                    84,055
<SALES>                                         37,085
<TOTAL-REVENUES>                                37,085
<CGS>                                           22,668
<TOTAL-COSTS>                                   22,668
<OTHER-EXPENSES>                                 7,229<F1>
<LOSS-PROVISION>                                   150<F2>
<INTEREST-EXPENSE>                                   5
<INCOME-PRETAX>                                (3,948)
<INCOME-TAX>                                     (987)
<INCOME-CONTINUING>                            (2,961)
<DISCONTINUED>                                 (3,838)
<EXTRAORDINARY>                                  (989)<F3>
<CHANGES>                                        (989)
<NET-INCOME>                                   (7,788)
<EPS-BASIC>                                      (.57)
<EPS-DILUTED>                                    (.57)
<FN>
<F1>Research and Development.
<F2>Provision for Bad Debt.
<F3>Cumulative Effect of Accounting Change.
</FN>