<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