<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
REGISTRANT'S FINANCIAL STATEMENTS AS OF AND FOR THE YEAR END MARCH 31, 1998 AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED
IN THE COMPANY'S FISCAL 1998 ANNUAL REPORT FORM 10-K.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1998
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               MAR-31-1998
<CASH>                                           6,460
<SECURITIES>                                    61,436
<RECEIVABLES>                                   12,529
<ALLOWANCES>                                       350
<INVENTORY>                                      8,185
<CURRENT-ASSETS>                                94,526
<PP&E>                                          22,392
<DEPRECIATION>                                   5,174
<TOTAL-ASSETS>                                 112,834
<CURRENT-LIABILITIES>                           17,109
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           225
<OTHER-SE>                                      91,409
<TOTAL-LIABILITY-AND-EQUITY>                   112,834
<SALES>                                         76,618
<TOTAL-REVENUES>                                76,618
<CGS>                                           34,321
<TOTAL-COSTS>                                   61,867
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 871
<INCOME-PRETAX>                                 15,622
<INCOME-TAX>                                       406
<INCOME-CONTINUING>                             15,622
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    15,216
<EPS-PRIMARY>                                     1.44
<EPS-DILUTED>                                     0.75