<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   6-MOS                   3-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997             DEC-31-1996
<PERIOD-END>                               SEP-30-1997             JUN-30-1997             MAR-31-1997             DEC-31-1996
<CASH>                                            8869                    9533                   10235                    8728
<SECURITIES>                                         0                       0                       0                       0
<RECEIVABLES>                                     9888                    7531                    9109                   10635
<ALLOWANCES>                                       242                      76                     176                      77
<INVENTORY>                                          0                       0                       0                      29
<CURRENT-ASSETS>                                 19291                   17535                   18406                   19900
<PP&E>                                            6938                    6808                    6675                    6431
<DEPRECIATION>                                    5698                    5544                    5400                    5267
<TOTAL-ASSETS>                                   26618                   24461                   24455                   24509
<CURRENT-LIABILITIES>                             9832                    8561                    9305                    9540
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                            31                      31                      30                      30
<OTHER-SE>                                       15928                   15096                   14504                   14337
<TOTAL-LIABILITY-AND-EQUITY>                     26618                   24461                   24455                   24509
<SALES>                                          22143                   13143                    6792                   28786
<TOTAL-REVENUES>                                 22143                   13143                    6792                   28786
<CGS>                                             7810                    4699                    2324                    9991
<TOTAL-COSTS>                                     7810                    4699                    2324                    9991
<OTHER-EXPENSES>                                 12510                    7813                    4352                   16491
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                               (405)                   (264)                   (136)                   (425)
<INCOME-PRETAX>                                   2253                     897                     270                    2712
<INCOME-TAX>                                       856                     342                     102                     760
<INCOME-CONTINUING>                               1397                     555                     168                    1952
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                      1397                     555                     168                    1952
<EPS-PRIMARY>                                      .46                     .18                     .06                     .67
<EPS-DILUTED>                                      .40                     .16                     .05                     .61
        

</TABLE>