<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               SEP-30-1996
<CASH>                                           6,309
<SECURITIES>                                    32,926
<RECEIVABLES>                                   17,814
<ALLOWANCES>                                     (615)
<INVENTORY>                                        632
<CURRENT-ASSETS>                                61,724
<PP&E>                                          10,665
<DEPRECIATION>                                 (4,718)
<TOTAL-ASSETS>                                  74,350
<CURRENT-LIABILITIES>                           14,883
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            23
<OTHER-SE>                                      58,880
<TOTAL-LIABILITY-AND-EQUITY>                    74,350
<SALES>                                         49,689
<TOTAL-REVENUES>                                49,689
<CGS>                                           20,232
<TOTAL-COSTS>                                   20,232
<OTHER-EXPENSES>                                24,188
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 438
<INCOME-PRETAX>                                  6,511
<INCOME-TAX>                                     1,766
<INCOME-CONTINUING>                              4,745
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     4,745
<EPS-PRIMARY>                                     0.20
<EPS-DILUTED>                                     0.19