<ARTICLE> 5
<LEGEND>
This schedule containing summary financial information extracted from the
condensed consolidated balance sheet at February 29, 2000 (unaudited) and the
consolidated statement of operations for the nine months ended February 29, 2000
(unaudited) is qualified in its entirety by reference to such financial
statements.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          MAY-31-2000
<PERIOD-START>                             JUN-01-1999
<PERIOD-END>                               FEB-29-2000
<CASH>                                          12,525
<SECURITIES>                                    98,188
<RECEIVABLES>                                   17,840
<ALLOWANCES>                                       900
<INVENTORY>                                          0
<CURRENT-ASSETS>                               132,140
<PP&E>                                          19,678
<DEPRECIATION>                                  14,638
<TOTAL-ASSETS>                                 168,554
<CURRENT-LIABILITIES>                           27,485
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            31
<OTHER-SE>                                     141,038
<TOTAL-LIABILITY-AND-EQUITY>                   168,554
<SALES>                                         47,081
<TOTAL-REVENUES>                                65,702
<CGS>                                              571
<TOTAL-COSTS>                                    6,531
<OTHER-EXPENSES>                                43,810
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  20
<INCOME-PRETAX>                                 19,280
<INCOME-TAX>                                       450
<INCOME-CONTINUING>                             18,830
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    18,830
<EPS-BASIC>                                       0.64
<EPS-DILUTED>                                     0.55