<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             MAR-31-1997             JUN-30-1997
<PERIOD-END>                               MAR-30-1997             JUN-29-1997             SEP-28-1997
<CASH>                                          85,080                  72,802                  78,935
<SECURITIES>                                    68,144                  43,295                  28,261
<RECEIVABLES>                                  165,506                 151,292                 137,223
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                               373,043                 339,651                 308,370
<PP&E>                                         198,899                 251,338                 240,957
<DEPRECIATION>                                  24,897                  40,896                  52,750
<TOTAL-ASSETS>                                 729,503                 651,756                 587,598
<CURRENT-LIABILITIES>                          523,189                 563,116                 563,263
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                         1,512                   1,519                   1,524
<OTHER-SE>                                     177,098                  61,083                (45,401)
<TOTAL-LIABILITY-AND-EQUITY>                   729,503                 651,756                 587,598
<SALES>                                         85,714                 108,736                  77,164
<TOTAL-REVENUES>                               149,223                 182,012                 149,911
<CGS>                                           29,134                  11,933                  11,793
<TOTAL-COSTS>                                   70,286                  58,485                  52,286
<OTHER-EXPENSES>                               231,812                 239,524                 203,929
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                             (1,789)                 (1,753)                 (1,830)
<INCOME-PRETAX>                              (141,361)               (110,177)               (107,723)
<INCOME-TAX>                                     2,800                   1,200                   2,800
<INCOME-CONTINUING>                          (144,161)               (111,377)               (110,523)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                 (144,161)               (111,377)               (110,523)
<EPS-PRIMARY>                                   (0.95)                  (0.73)                  (0.73)
<EPS-DILUTED>                                   (0.95)                  (0.73)                  (0.73)


</TABLE>