<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
FINANCIAL STATEMENTS FOR THE NINE MONTHS ENDED DECEMBER 31, 1997 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                          43,149
<SECURITIES>                                    32,869
<RECEIVABLES>                                   29,894
<ALLOWANCES>                                     1,335
<INVENTORY>                                     21,899
<CURRENT-ASSETS>                               140,546
<PP&E>                                          19,788
<DEPRECIATION>                                   9,024
<TOTAL-ASSETS>                                 153,397
<CURRENT-LIABILITIES>                           30,507
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       113,782
<OTHER-SE>                                       9,108
<TOTAL-LIABILITY-AND-EQUITY>                   122,890
<SALES>                                        120,308
<TOTAL-REVENUES>                               120,308
<CGS>                                           67,276
<TOTAL-COSTS>                                   67,276
<OTHER-EXPENSES>                                34,983
<LOSS-PROVISION>                                 1,611
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 20,139
<INCOME-TAX>                                     7,250
<INCOME-CONTINUING>                             12,889
<DISCONTINUED>                                  (1,840)
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    11,049
<EPS-PRIMARY>                                      .99
<EPS-DILUTED>                                      .93