<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             MAR-31-1997             JAN-01-1997
<PERIOD-END>                               JUN-30-1997             JUN-30-1997
<CASH>                                         157,470                 157,470
<SECURITIES>                                    31,796                  31,796
<RECEIVABLES>                                   51,099                  51,099
<ALLOWANCES>                                     3,693                   3,693
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                               256,915                 256,915
<PP&E>                                         128,407                 128,407
<DEPRECIATION>                                  50,508                  50,508
<TOTAL-ASSETS>                                 417,089                 417,089
<CURRENT-LIABILITIES>                          103,692                 103,692
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           407                     407
<OTHER-SE>                                     225,486                 225,486
<TOTAL-LIABILITY-AND-EQUITY>                   417,089                 417,089
<SALES>                                         98,519                 191,092
<TOTAL-REVENUES>                                98,519                 191,092
<CGS>                                           31,885                  61,702
<TOTAL-COSTS>                                   31,885                  61,702
<OTHER-EXPENSES>                                97,557                 144,972
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               1,307                   2,837
<INCOME-PRETAX>                                (31,618)                (17,299)
<INCOME-TAX>                                    (4,333)                   (281)
<INCOME-CONTINUING>                            (27,285)                (17,018)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                   (27,285)                (17,018)
<EPS-PRIMARY>                                     (.64)                   (.40)
<EPS-DILUTED>                                     (.64)                   (.40)