<ARTICLE> 5 <MULTIPLIER> 1000 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> APR-30-1997 <PERIOD-START> MAY-01-1996 <PERIOD-END> APR-30-1997 <CASH> 138,777 <SECURITIES> 22,642 <RECEIVABLES> 118,336 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 382,816 <PP&E> 355,212 <DEPRECIATION> 289,301 <TOTAL-ASSETS> 802,536 <CURRENT-LIABILITIES> 114,989 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 651,436 <TOTAL-LIABILITY-AND-EQUITY> 802,536 <SALES> 0 <TOTAL-REVENUES> 841,887 <CGS> 0 <TOTAL-COSTS> 1,038,231 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> (186,502) <INCOME-TAX> (66,668) <INCOME-CONTINUING> (119,834) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (119,834) <EPS-PRIMARY> (1.29) <EPS-DILUTED> (1.29)