<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 on
pages 3 and 4 of the Company's Form 10-Q for the nine months ended December 31
and is qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                   9-MOS
<FISCAL-YEAR-END>                          MAR-31-1997             MAR-31-1997
<PERIOD-END>                               MAR-31-1997             DEC-31-1997
<CASH>                                          17,349                  18,671
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   12,730                  14,774
<ALLOWANCES>                                     1,371                   2,881
<INVENTORY>                                        205                      99
<CURRENT-ASSETS>                                30,212                  32,883
<PP&E>                                          45,829                  46,431
<DEPRECIATION>                                  40,866                  42,509
<TOTAL-ASSETS>                                  37,900                  38,563
<CURRENT-LIABILITIES>                           35,717                  27,283
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                        187                     188
<COMMON>                                           175                     182
<OTHER-SE>                                     (1,134)                   8,634
<TOTAL-LIABILITY-AND-EQUITY>                    37,900                  38,563
<SALES>                                         18,821                   9,594
<TOTAL-REVENUES>                                64,823                  39,368
<CGS>                                            7,501                   2,857
<TOTAL-COSTS>                                   28,104                  14,340
<OTHER-EXPENSES>                                54,624                  23,582
<LOSS-PROVISION>                                   304                       0
<INTEREST-EXPENSE>                                 400                       0
<INCOME-PRETAX>                               (29,550)                   1,561
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                           (29,550)                   1,561
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                  (29,550)                   1,561
<EPS-PRIMARY>                                   (0.17)                     .09
<EPS-DILUTED>                                   (0.17)                     .06
        

</TABLE>