Exhibit 13.1

Quarterly Information
(In millions, except per share data) (Unaudited)



                                                       Quarter Ended
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                                     Sept. 30      Dec. 31      Mar. 31       June 30         Year
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1998
Revenue                                 $ 3,334      $ 3,792       $ 3,984        $4,152        $15,262
Gross profit                              2,800        3,179         3,344         3,479         12,802
Net income                                  663        1,133         1,337         1,357          4,490
Basic earnings per share                   0.14         0.24          0.27          0.27           0.92
Diluted earnings per share                 0.13         0.21          0.25          0.25           0.84
Common stock price per share:
  High                                    37.69        36.66         45.47         54.28          54.28
  Low                                     30.82        29.50         31.10         40.94          29.50
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1999
Revenue                                 $ 4,193      $ 5,195       $ 4,595        $5,764        $19,747
Gross profit                              3,544        4,407         3,887         5,095         16,933
Net income                                1,683        1,983         1,917         2,202          7,785
Basic earnings per share                   0.34         0.40          0.38          0.43           1.54
Diluted earnings per share                 0.31         0.36          0.35          0.40           1.42
Common stock price per share:
  High                                    59.81        72.00         94.63         95.63          95.63
  Low                                     47.25        43.88         68.00         75.50          43.88
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2000
Revenue                                 $ 5,384      $ 6,112       $ 5,656        $5,804        $22,956
Gross profit                              4,672        5,356         4,904         5,022         19,954
Net income                                2,191        2,436         2,385         2,409          9,421
Basic earnings per share                   0.43         0.47          0.46          0.46           1.81
Diluted earnings per share                 0.40         0.44          0.43          0.44           1.70
Common stock price per share:
  High                                   100.75       119.94        118.63         96.50         119.94
  Low                                     81.63        84.38         88.13         60.38          60.38
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The Company's common stock is traded on The Nasdaq Stock Market under the symbol
MSFT. On July 31, 2000, there were 107,824 registered holders of record of the
Company's common stock. The Company has not paid cash dividends on its common
stock.