<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED FINANCIAL STATEMENTS CONTAINED IN THE COMPANY'S QUARTERLY
REPORT ON FORM 10-Q FOR THE QUARTER ENDED MARCH 31, 1999 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               MAR-31-1999
<CASH>                                             114
<SECURITIES>                                     1,204
<RECEIVABLES>                                      390
<ALLOWANCES>                                        21
<INVENTORY>                                        117
<CURRENT-ASSETS>                                 1,973
<PP&E>                                           2,127
<DEPRECIATION>                                     645
<TOTAL-ASSETS>                                   3,818
<CURRENT-LIABILITIES>                              852
<BONDS>                                            223
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                       2,743
<TOTAL-LIABILITY-AND-EQUITY>                     3,818
<SALES>                                            688
<TOTAL-REVENUES>                                   746
<CGS>                                               92
<TOTAL-COSTS>                                       92
<OTHER-EXPENSES>                                   188<F1>
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   2
<INCOME-PRETAX>                                    346
<INCOME-TAX>                                        99
<INCOME-CONTINUING>                                247
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       247
<EPS-PRIMARY>                                     0.48<F2>
<EPS-DILUTED>                                     0.46
<FN>
<F1>ITEM CONSISTS OF RESEARCH AND DEVELOPMENT EXPENSES.
<F2>"EPS-PRIMARY" DENOTES BASIC EPS.
</FN>