<TABLE> <S> <C>


<ARTICLE> 5
<LEGEND>
THE FOLLOWING ARE RESTATED FINANCIAL DATA SCHEDULES FOR THE REPORTING PERIODS
ENDED MARCH 31, 1996; JUNE 30, 1996; SEPTEMBER 30, 1996, AND DECEMBER 31, 1996
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-END>                               MAR-31-1996             JUN-30-1996             SEP-30-1996             DEC-31-1996
<CASH>                                          30,119                  30,631                  33,369                  34,756
<SECURITIES>                                         0                       0                   1,028                   1,028
<RECEIVABLES>                                   11,453                  10,444                   8,004                   8,032
<ALLOWANCES>                                         0                       0                       0                       0
<INVENTORY>                                     10,081                  11,600                  10,818                  10,332
<CURRENT-ASSETS>                                52,810                  53,736                  54,320                  55,512
<PP&E>                                           3,979                   4,268                   4,429                   4,535
<DEPRECIATION>                                   1,811                   1,987                   2,132                   2,276
<TOTAL-ASSETS>                                  59,207                  60,206                  60,758                  61,718
<CURRENT-LIABILITIES>                            7,807                   5,552                   4,335                   3,738
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                             8                       8                       8                       8
<OTHER-SE>                                      51,392                  54,646                  56,415                  57,972
<TOTAL-LIABILITY-AND-EQUITY>                    59,207                  60,206                  60,758                  61,718
<SALES>                                         17,049                  34,320                  47,368                  58,387
<TOTAL-REVENUES>                                17,049                  34,320                  47,368                  58,387
<CGS>                                            7,486                  14,940                  20,997                  26,219
<TOTAL-COSTS>                                    7,486                  14,940                  20,997                  26,219
<OTHER-EXPENSES>                                 1,920                   3,851                   5,785                   7,631
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                                   0                       0                       0                       0
<INCOME-PRETAX>                                  4,413                   9,125                  11,744                  13,492
<INCOME-TAX>                                     1,412                   2,921                   3,759                   4,250
<INCOME-CONTINUING>                              3,001                   6,204                   7,985                   9,242
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                     3,001                   6,204                   7,985                   9,242
<EPS-PRIMARY>                                      .36                     .74                     .96                    1.10
<EPS-DILUTED>                                      .35                     .72                     .93                    1.08



</TABLE>