<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-1999
<PERIOD-START>                             APR-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          13,446
<SECURITIES>                                    77,887
<RECEIVABLES>                                   13,891
<ALLOWANCES>                                     7,184
<INVENTORY>                                        458
<CURRENT-ASSETS>                               117,221
<PP&E>                                          62,192
<DEPRECIATION>                                  23,949
<TOTAL-ASSETS>                                 166,392
<CURRENT-LIABILITIES>                           35,926
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            40
<OTHER-SE>                                     129,970
<TOTAL-LIABILITY-AND-EQUITY>                   166,392
<SALES>                                         67,561
<TOTAL-REVENUES>                                67,561
<CGS>                                            6,348
<TOTAL-COSTS>                                   53,445
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 10,335
<INCOME-TAX>                                     3,204
<INCOME-CONTINUING>                              7,131
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     7,131
<EPS-PRIMARY>                                     0.18
<EPS-DILUTED>                                     0.16