<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
<CURRENCY> U.S.DOLLARS
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               SEP-30-1996
<EXCHANGE-RATE>                                      1
<CASH>                                          12,318
<SECURITIES>                                    14,825
<RECEIVABLES>                                   21,533
<ALLOWANCES>                                       347
<INVENTORY>                                      7,165
<CURRENT-ASSETS>                                57,331
<PP&E>                                          24,508
<DEPRECIATION>                                  17,115
<TOTAL-ASSETS>                                  74,535
<CURRENT-LIABILITIES>                           15,645
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        56,181
<OTHER-SE>                                       2,709
<TOTAL-LIABILITY-AND-EQUITY>                    74,535
<SALES>                                         48,120
<TOTAL-REVENUES>                                47,120
<CGS>                                           18,746
<TOTAL-COSTS>                                   18,746
<OTHER-EXPENSES>                                34,438
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  95
<INCOME-PRETAX>                                (3,872)
<INCOME-TAX>                                     1,233
<INCOME-CONTINUING>                            (5,105)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (5,105)
<EPS-PRIMARY>                                   (0.22)<F1><F2>
<EPS-DILUTED>                                   (0.22)<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>