<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
REGISTRANT'S REPORT ON FORM 10-Q/A FOR THE THREE MONTHS ENDED OCTOBER 31, 1999
AND IS QUALIFIED IN ITS ENTIRETY TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> JUL-31-2000
<PERIOD-START> AUG-01-1999
<PERIOD-END> OCT-31-1999
<CASH> 99,287
<SECURITIES> 105,498
<RECEIVABLES> 139,650
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 397,486
<PP&E> 162,742
<DEPRECIATION> 44,114
<TOTAL-ASSETS> 657,361
<CURRENT-LIABILITIES> 135,352
<BONDS> 0
0
0
<COMMON> 241
<OTHER-SE> 313,821
<TOTAL-LIABILITY-AND-EQUITY> 657,361
<SALES> 0
<TOTAL-REVENUES> 283,421
<CGS> 230,199
<TOTAL-COSTS> 288,742
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 1,802
<INTEREST-EXPENSE> 3,297
<INCOME-PRETAX> 59,840
<INCOME-TAX> 26,706
<INCOME-CONTINUING> 35,731
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 35,731
<EPS-BASIC> 1.05
<EPS-DILUTED> 0.98
</TABLE>