<ARTICLE> 5
<LEGEND>
THIS AMENDED AND RESTATED SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS CONTAINED IN THE
COMPANY'S QUARTERLY REPORTS ON FORM 10-Q FOR THE QUARTERS ENDED SEPTEMBER 30,
1997, JUNE 30, 1997 AND MARCH 31, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000,000
       
                                                                       
<PERIOD-TYPE>                   9-MOS                   6-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               SEP-30-1997             JUN-30-1997             MAR-31-1997
<CASH>                                             240                     331                     265
<SECURITIES>                                       862                     894                     780
<RECEIVABLES>                                      250                     242                     219
<ALLOWANCES>                                        14                      13                      12
<INVENTORY>                                        111                     106                     100
<CURRENT-ASSETS>                                 1,526                   1,646                   1,437
<PP&E>                                           1,579                   1,490                   1,400
<DEPRECIATION>                                     467                     445                     418
<TOTAL-ASSETS>                                   3,002                   3,043                   2,773
<CURRENT-LIABILITIES>                              634                     588                     539
<BONDS>                                            129                     134                      59
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                             0                       0                       0
<OTHER-SE>                                       2,239                   2,270                   2,018
<TOTAL-LIABILITY-AND-EQUITY>                     3,002                   3,043                   2,773
<SALES>                                          1,656                   1,103                     536
<TOTAL-REVENUES>                                 1,794                   1,196                     576
<CGS>                                              223                     149                      72
<TOTAL-COSTS>                                      223                     149                      72
<OTHER-EXPENSES>                                   466<F1>                 293<F1>                 148<F1>
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                                   1                       1                       0
<INCOME-PRETAX>                                    617                     529                     250
<INCOME-TAX>                                       152                     148                      70
<INCOME-CONTINUING>                                465<F2>                 381<F2>                 180<F2>
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                       465                     381                     180
<EPS-PRIMARY>                                     0.88<F3>                0.72<F3>                0.34<F3>
<EPS-DILUTED>                                     0.84<F3>                0.69<F3>                0.32<F3>
<FN>
<F1>AMENDED TO CONFORM WITH THE REQUIREMENTS OF REGULATION S-K, ITEM 601(c),
APPENDIX A. ITEM CONSISTS OF RESEARCH AND DEVELOPMENT EXPENSES.
<F2>AMENDED TO CONFORM WITH THE REQUIREMENTS OF REGULATION S-K, ITEM 601(c),
APPENDIX A.
<F3>RETROACTIVELY RESTATED TO REFLECT A TWO-FOR-ONE SPLIT OF THE COMMON STOCK
EFFECTED IN THE FORM OF A 100 PERCENT STOCK DIVIDEND ON OUTSTANDING STOCK
DISTRIBUTED ON FEBRUARY 26, 1999, TO STOCKHOLDERS OF RECORD ON FEBRUARY 12,
1999.  "EPS-PRIMARY" DENOTES BASIC EPS.
</FN>