<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S CONSOLIDATED FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER>                  1,000
       
                                                                            
<PERIOD-TYPE>                        9-MOS                   6-MOS                   3-MOS
<FISCAL-YEAR-END>                    DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-END>                         SEP-30-1997             JUN-30-1997             MAR-31-1997
<CASH>                                    23,417                  21,881                  23,144
<SECURITIES>                                   0                       0                       0
<RECEIVABLES>                             26,077                  23,046                  24,091
<ALLOWANCES>                                 674                     658                     738
<INVENTORY>                               20,768                  20,024                  20,008
<CURRENT-ASSETS>                          74,072                  68,923                  72,048
<PP&E>                                    12,571                  12,570                  12,156
<DEPRECIATION>                             7,276                   6,645                   5,858
<TOTAL-ASSETS>                            91,429                  88,134                  88,386
<CURRENT-LIABILITIES>                     19,564                  18,723                  24,782
<BONDS>                                        0                       0                       0
<PREFERRED-MANDATORY>                          0                       0                       0
<PREFERRED>                                    0                       0                       0
<COMMON>                                  49,414                  49,356                  48,132
<OTHER-SE>                                21,989                  17,530                  14,885
<TOTAL-LIABILITY-AND-EQUITY>              91,429                  86,134                  88,386
<SALES>                                   89,220                  57,626                  27,830
<TOTAL-REVENUES>                          89,220                  57,626                  27,830
<CGS>                                     62,935                  34,080                  16,185
<TOTAL-COSTS>                             19,909                  13,144                   6,645
<OTHER-EXPENSES>                               0                       0                       0
<LOSS-PROVISION>                               0                       0                       0
<INTEREST-EXPENSE>                           772                     634                     264
<INCOME-PRETAX>                           17,148                  10,956                   5,264
<INCOME-TAX>                               6,001                   3,834                   1,842
<INCOME-CONTINUING>                       11,147                   7,122                   3,422
<DISCONTINUED>                                 0                       0                       0
<EXTRAORDINARY>                                0                       0                       0
<CHANGES>                                      0                       0                       0
<NET-INCOME>                              11,147                   7,122                   3,422
<EPS-PRIMARY>                               1.37                    0.89                    0.43
<EPS-DILUTED>                               1.37                    0.89                    0.43