<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 1997 AND
1998 FINANCIAL STATEMENTS 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>                             JAN-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          61,368
<SECURITIES>                                     8,065
<RECEIVABLES>                                   27,632
<ALLOWANCES>                                         0
<INVENTORY>                                     34,376
<CURRENT-ASSETS>                               142,620
<PP&E>                                          33,080
<DEPRECIATION>                                  14,415
<TOTAL-ASSETS>                                 163,572
<CURRENT-LIABILITIES>                           22,383
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         9,738
<OTHER-SE>                                     130,033
<TOTAL-LIABILITY-AND-EQUITY>                   163,572
<SALES>                                        146,170
<TOTAL-REVENUES>                               146,170
<CGS>                                           94,598
<TOTAL-COSTS>                                   94,598
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 21,295
<INCOME-TAX>                                     7,300
<INCOME-CONTINUING>                             13,995
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    13,995
<EPS-PRIMARY>                                     1.44
<EPS-DILUTED>                                     1.40