<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 253,237
<SECURITIES> 135,602
<RECEIVABLES> 378,873
<ALLOWANCES> 21,786
<INVENTORY> 0
<CURRENT-ASSETS> 808,337
<PP&E> 558,596
<DEPRECIATION> 367,138
<TOTAL-ASSETS> 1,741,879
<CURRENT-LIABILITIES> 353,768
<BONDS> 6,940
0
0
<COMMON> 1,329
<OTHER-SE> 1,379,842
<TOTAL-LIABILITY-AND-EQUITY> 1,741,879
<SALES> 0
<TOTAL-REVENUES> 1,198,970
<CGS> 0
<TOTAL-COSTS> 695,245<F1>
<OTHER-EXPENSES> 7,962<F2>
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 1,383
<INCOME-PRETAX> 251,947
<INCOME-TAX> 101,419
<INCOME-CONTINUING> 150,528
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 150,528
<EPS-BASIC> 1.14<F3>
<EPS-DILUTED> 1.12<F3>
<FN>
<F1>Excludes selling, marketing and administration costs and all items
described in <F2>.
<F2>Merger costs, including purchased in-process research and development of
$5,206.
<F3>Includes all items described in <F2>, totaling $0.04 per both basic and
diluted share.
</FN>
</TABLE>