<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               MAR-31-1996
<CASH>                                          42,881
<SECURITIES>                                         0
<RECEIVABLES>                                   14,083
<ALLOWANCES>                                       277
<INVENTORY>                                      8,561
<CURRENT-ASSETS>                                66,672
<PP&E>                                          23,217
<DEPRECIATION>                                  15,918
<TOTAL-ASSETS>                                  74,734
<CURRENT-LIABILITIES>                           14,819
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        55,226
<OTHER-SE>                                       4,369
<TOTAL-LIABILITY-AND-EQUITY>                    74,734
<SALES>                                         11,860
<TOTAL-REVENUES>                                11,860
<CGS>                                            4,595
<TOTAL-COSTS>                                    4,595
<OTHER-EXPENSES>                                11,183
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  33
<INCOME-PRETAX>                                (3,540)
<INCOME-TAX>                                       428
<INCOME-CONTINUING>                            (3,968)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (3,968)
<EPS-PRIMARY>                                   (0.17)<F1><F2>
<EPS-DILUTED>                                   (0.17)<F1><F3>
<FN>
<F1>On August 22, 1997, the Company effected a two-for-one split of its outstanding
shares of Common Stock. This Restated Financial Data Schedule reflects the
stock split.
<F2>Data listed for "EPS-PRIMARY" is the newly defined "BASIC EPS".
<F3>Data listed for "EPS-DILUTED" is the newly defined "DILUTED EPS".
</FN>