<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> MAY-31-1998 <PERIOD-START> JUN-01-1997 <PERIOD-END> NOV-30-1997 <CASH> 22,231 <SECURITIES> 0 <RECEIVABLES> 88,696 <ALLOWANCES> 2,524 <INVENTORY> 2,082 <CURRENT-ASSETS> 124,725 <PP&E> 132,274 <DEPRECIATION> 81,165 <TOTAL-ASSETS> 536,822 <CURRENT-LIABILITIES> 60,953 <BONDS> 151,654 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 3,349 <OTHER-SE> 295,599 <TOTAL-LIABILITY-AND-EQUITY> 536,822 <SALES> 240,137 <TOTAL-REVENUES> 240,137 <CGS> 116,326 <TOTAL-COSTS> 199,661 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 4,484 <INCOME-PRETAX> 35,624 <INCOME-TAX> 13,537 <INCOME-CONTINUING> 22,087 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 22,087 <EPS-PRIMARY> 0.79 <EPS-DILUTED> 0.79