<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               MAR-31-1997
<CASH>                                          19,996
<SECURITIES>                                    12,032
<RECEIVABLES>                                   18,660
<ALLOWANCES>                                       411
<INVENTORY>                                     11,131
<CURRENT-ASSETS>                                63,414
<PP&E>                                          26,527
<DEPRECIATION>                                  17,844
<TOTAL-ASSETS>                                  83,943
<CURRENT-LIABILITIES>                           19,853
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        58,557
<OTHER-SE>                                       5,533
<TOTAL-LIABILITY-AND-EQUITY>                    83,943
<SALES>                                         20,577
<TOTAL-REVENUES>                                20,577
<CGS>                                            6,678
<TOTAL-COSTS>                                    6,678
<OTHER-EXPENSES>                                12,035
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                  2,397
<INCOME-TAX>                                       769
<INCOME-CONTINUING>                              1,628
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,628
<EPS-PRIMARY>                                      .07<F1><F2>
<EPS-DILUTED>                                      .06<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>