<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S FORM 10-K FOR FISCAL YEAR 1995. THE FIGURES HEREIN REFLECT THE 
FEBRUARY 1997 MERGER OF THE COMPANY WITH SPEEDSIM, INC. WHICH WAS 
ACCOUNTED FOR AS A POOLING OF INTERESTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-START>                             JAN-01-1995
<PERIOD-END>                               DEC-31-1995
<CASH>                                          17,658
<SECURITIES>                                    14,777
<RECEIVABLES>                                   22,898
<ALLOWANCES>                                     1,840
<INVENTORY>                                      7,805
<CURRENT-ASSETS>                                68,583
<PP&E>                                          26,895
<DEPRECIATION>                                  13,828
<TOTAL-ASSETS>                                  94,240
<CURRENT-LIABILITIES>                           24,202
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            16
<OTHER-SE>                                      66,321
<TOTAL-LIABILITY-AND-EQUITY>                    94,240
<SALES>                                         82,442
<TOTAL-REVENUES>                                82,442
<CGS>                                           25,106
<TOTAL-COSTS>                                   25,106
<OTHER-EXPENSES>                                46,251
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 750
<INCOME-PRETAX>                                 11,866
<INCOME-TAX>                                     (612)
<INCOME-CONTINUING>                             12,478
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    12,478
<EPS-PRIMARY>                                     0.81
<EPS-DILUTED>                                     0.74