<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                                                            
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-1997             OCT-31-1997             OCT-31-1997             OCT-31-1997
<PERIOD-END>                               JAN-31-1997             APR-30-1997             JUL-31-1997             OCT-31-1997
<CASH>                                         124,574                 233,996                 198,319                 299,324
<SECURITIES>                                    44,121                  39,059                  33,960                  10,089
<RECEIVABLES>                                  767,861                 835,618                 847,235                 930,104
<ALLOWANCES>                                         0                       0                       0                       0
<INVENTORY>                                    151,310                 186,992                 216,342                  58,039
<CURRENT-ASSETS>                             1,710,349               1,914,153               2,006,878               2,225,886
<PP&E>                                       2,618,072               2,708,587               2,815,859               2,940,105
<DEPRECIATION>                                 862,902                 903,610                 954,552               1,001,315
<TOTAL-ASSETS>                               4,005,275               4,235,697               4,417,127               4,697,840
<CURRENT-LIABILITIES>                        1,651,827               1,676,455               1,806,290               1,990,684
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                        52,518                  52,446                  52,406                  52,343
<OTHER-SE>                                   1,671,691               1,579,438               1,627,474               1,688,707
<TOTAL-LIABILITY-AND-EQUITY>                 4,005,275               4,235,697               4,417,127               4,697,840
<SALES>                                              0                       0                       0                       0
<TOTAL-REVENUES>                             3,434,061               6,619,894              10,295,799              14,298,541
<CGS>                                                0                       0                       0                       0
<TOTAL-COSTS>                                3,327,287               6,586,956              10,154,270              14,022,570
<OTHER-EXPENSES>                                     0                       0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                               5,542                  12,524                  20,044                  30,758
<INCOME-PRETAX>                                 95,625                  17,218                 119,262                 255,269
<INCOME-TAX>                                    33,590                  25,317                  61,119                 109,082
<INCOME-CONTINUING>                             62,035                  (8,099)                 58,143                 146,187
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                    62,035                  (8,099)                 58,143                 146,187
<EPS-PRIMARY>                                     0.75                   (0.10)                   0.70                    1.76
<EPS-DILUTED>                                     0.74                   (0.10)                   0.70                    1.75