<TABLE> <S> <C>


<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> US DOLLARS

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   YEAR                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1994             DEC-31-1995             DEC-31-1996
<PERIOD-START>                             JAN-01-1994             JAN-01-1995             JAN-01-1996
<PERIOD-END>                               DEC-31-1994             DEC-31-1995             DEC-31-1996
<EXCHANGE-RATE>                                      1                       1                       1
<CASH>                                          24,956                  25,829                  16,612
<SECURITIES>                                     2,100                   6,863                   6,918
<RECEIVABLES>                                   11,986                  12,138                   7,625
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                      5,023                   4,425                   8,737
<CURRENT-ASSETS>                                46,782                  50,712                  40,977
<PP&E>                                          31,089                  31,875                  13,625
<DEPRECIATION>                                  20,960                  23,558                   9,031
<TOTAL-ASSETS>                                  56,911                  59,029                  45,571
<CURRENT-LIABILITIES>                           19,232                  11,706                  10,380
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                        47,884                  49,141                  49,292
<OTHER-SE>                                    (10,205)                 (1,818)                (14,101)
<TOTAL-LIABILITY-AND-EQUITY>                    56,991                  59,029                  45,571
<SALES>                                         75,817                  51,810                  32,175
<TOTAL-REVENUES>                                93,912                  75,323                  45,296
<CGS>                                           36,996                  27,373                  20,825
<TOTAL-COSTS>                                   48,148                  36,664                  25,670
<OTHER-EXPENSES>                                48,512                  31,388                  32,741
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               (455)                 (1,437)                 (1,261)
<INCOME-PRETAX>                                (1,088)                   8,708                (11,854)
<INCOME-TAX>                                       251                     488                     160
<INCOME-CONTINUING>                            (1,339)                   8,220                (12,014)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                   (1,339)                   8,220                (12,014)
<EPS-PRIMARY>                                   (0.09)                    0.52                  (0.77)
<EPS-DILUTED>                                   (0.09)                    0.52                  (0.77)


</TABLE>