FISCAL YEARS ENDED MARCH 31,
                                     -----------------------------------------
                                      1997     1996    1995    1994     1993
                                     -------  ------- ------- -------  -------
                                         (IN THOUSANDS, EXCEPT PER SHARE
                                                    AMOUNTS)
Net revenues........................ $48,262  $55,412 $38,147 $23,332  $13,864
Cost of revenues....................  16,899   17,897  14,186   8,367    5,323
                                     -------  ------- ------- -------  -------
Gross profit........................  31,363   37,515  23,961  14,965    8,541
                                     -------  ------- ------- -------  -------
Operating expenses:
  Research and development..........  12,652    8,416   6,008   3,299    2,440
  Acquisition-related charge........     --     2,232     --      --       --
  Sales and marketing...............  16,517   12,843   8,813   5,407    2,591
  General and administrative........   6,747    5,504   4,184   3,225    2,669
                                     -------  ------- ------- -------  -------
Total operating expenses............  35,916   28,995  19,005  11,931    7,700
                                     -------  ------- ------- -------  -------
Income (loss) from operations.......  (4,553)   8,520   4,956   3,034      841
Interest income.....................   1,640    1,493     226     114      197
                                     -------  ------- ------- -------  -------
Income (loss) from continuing
 operations before income taxes.....  (2,913)  10,013   5,182   3,148    1,038
Provision (benefit) for income
 taxes..............................  (1,238)   3,825   1,879   1,021      368
                                     -------  ------- ------- -------  -------
Income (loss) from continuing
 operations.........................  (1,675)   6,188   3,303   2,127      670
                                     -------  ------- ------- -------  -------
Discontinued operations:
  Loss from discontinued operations
   (net of income tax benefit of
   $251 in fiscal 1994 and $203 in
   fiscal 1993).....................     --       --      --     (376)    (600)
  Gain on disposal of discontinued
   operations (net of income tax
   expense of $173 in fiscal 1995)..     --       --      303     --       --
                                     -------  ------- ------- -------  -------
Net income (loss)................... $(1,675) $ 6,188 $ 3,606 $ 1,751  $    70
                                     =======  ======= ======= =======  =======
Per share amounts:
  Income (loss) from continuing
   operations....................... $  (.15) $   .56 $   .37 $   .25  $   .08
                                     =======  ======= ======= =======  =======
  Net income (loss) per share....... $  (.15) $   .56 $   .40 $   .20  $   .01
                                     =======  ======= ======= =======  =======
Shares used in per share
 calculations.......................  11,180   11,051   8,915   8,621    8,061
                                     =======  ======= ======= =======  =======

                                                      MARCH 31,
                                         -------------------------------------
                                          1997    1996    1995   1994    1993
                                         ------- ------- ------ ------  ------
Balance Sheet Data:
Cash, cash equivalents and short-term
 marketable securities.................. $38,045 $42,890 $8,655 $4,932  $6,932
Working capital.........................  41,259  45,265 11,457  8,208   6,913
Total assets............................  69,329  67,300 19,142 14,427  10,168
Redeemable preferred stock..............     --      --  11,363 10,849  10,335
Stockholders' equity (deficit)..........  58,531  57,234  2,388 (1,239) (2,480)