<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEETS AND CONSOLIDATED STATEMENTS OF OPERATIONS FOUND
WITHIN THE FORMS 10Q AND 10-K OF IA AND IQ AS OF AND FOR THE PERIODS INDICATED
BELOW, AS RESTATED TO REFLECT THE SEPTEMBER 1998 POOLING OF IA AND IQ AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          JAN-31-1997             JAN-31-1998             JAN-31-1998             JAN-31-1998
<PERIOD-START>                             NOV-01-1996             FEB-01-1997             FEB-01-1997             FEB-01-1997
<PERIOD-END>                               JAN-31-1997             APR-30-1997             JUL-31-1997             OCT-31-1997
<CASH>                                           5,132                  10,558                   9,579                   7,968
<SECURITIES>                                     4,945                   5,010                   5,449                   8,596
<RECEIVABLES>                                   12,045                  11,687                  13,121                  14,363
<ALLOWANCES>                                     (755)                   (742)                   (789)                   (817)
<INVENTORY>                                          0                       0                       0                       0
<CURRENT-ASSETS>                                24,869                  30,035                  29,493                  32,392
<PP&E>                                           8,263                   8,677                   8,994                  10,187
<DEPRECIATION>                                 (5,340)                 (5,700)                 (6,099)                 (6,503)
<TOTAL-ASSETS>                                  31,213                  36,531                  35,935                  39,913
<CURRENT-LIABILITIES>                            9,692                  10,182                  11,164                  14,609
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                     17,410                  24,410                  24,410                  24,410
<COMMON>                                           102                     102                     102                     108
<OTHER-SE>                                       2,412                     369                 (1,085)                   (646)
<TOTAL-LIABILITY-AND-EQUITY>                    31,213                  36,531                  35,935                  39,913
<SALES>                                              0                       0                       0                       0
<TOTAL-REVENUES>                                36,425                  10,325                  22,231                  35,485
<CGS>                                                0                       0                       0                       0
<TOTAL-COSTS>                                    8,170                   2,726                   5,952                   9,328
<OTHER-EXPENSES>                                34,295                   9,793                  20,139                  31,159
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                               (244)                    (23)                    (81)                   (140)
<INCOME-PRETAX>                                (5,642)                 (2,092)                 (3,607)                 (4,661)
<INCOME-TAX>                                       669                      45                     145                     258
<INCOME-CONTINUING>                            (6,311)                 (2,137)                 (3,752)                 (4,919)
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                   (6,311)                 (2,137)                 (3,752)                 (4,919)
<EPS-PRIMARY>                                   (0.63)                  (0.21)                  (0.37)                  (0.48)
<EPS-DILUTED>                                   (0.63)                  (0.21)                  (0.37)                  (0.48)
        

</TABLE>