<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AND THE INCOME STATEMENT AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS. THE EPS PRIMARY NUMBER BELOW REFLECTS THE BASIC
EARNINGS PER SHARE AS REQUIRED BY FINANCIAL ACCOUNTING STANDARDS NUMBER 128.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1998
<PERIOD-END>                               JUN-30-1997             JUN-30-1998
<CASH>                                         420,198                 636,993
<SECURITIES>                                    52,383                  55,575
<RECEIVABLES>                                2,998,150               3,336,230
<ALLOWANCES>                                    23,609                  44,127
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                             3,833,157               4,450,879
<PP&E>                                         554,164                 632,314
<DEPRECIATION>                                 312,917                 356,591
<TOTAL-ASSETS>                               5,411,802               6,346,004
<CURRENT-LIABILITIES>                        3,780,581               4,243,391
<BONDS>                                        116,626                 202,558
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        13,820                  14,483
<OTHER-SE>                                     916,322               1,199,176
<TOTAL-LIABILITY-AND-EQUITY>                 5,411,802               6,346,004
<SALES>                                              0                       0
<TOTAL-REVENUES>                             1,504,655               1,747,663
<CGS>                                                0                       0
<TOTAL-COSTS>                                1,286,169               1,475,697
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                              22,004                  23,609
<INCOME-PRETAX>                                218,486                 271,966
<INCOME-TAX>                                    88,018                 112,639
<INCOME-CONTINUING>                            122,651                 152,193
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                   122,651                 152,193
<EPS-PRIMARY>                                      .97                    1.15
<EPS-DILUTED>                                      .93                    1.11