Microsoft History

Historical Events


Historic InventionFounding of Microsoft

1975-04-04 Microsoft is founded as a partnership between Bill Gates and Paul Allen to develop and sell BASIC interpreters for the Altair 8800
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Paul Allen and Bill Gates, the founders of Microsoft
Paul Allen and Bill Gates, the founders of Microsoft
  • 1981-06-25 Microsoft is restructured to become an incorporated business in its home state of Washington

Event of interestEvent of Interest

1988-10-28 Microsoft co-founder Paul Allen gives $10 million to University of Washington library

Co-founder of Microsoft Paul Allen
Co-founder of Microsoft
Paul Allen
  • 1990-05-22 Microsoft releases Windows 3.0
  • 1991-06-11 Microsoft releases MS DOS 5.0
  • 1992-04-06 Microsoft announced Windows 3.1, upgrading Windows 3.0
  • 1992-04-14 Court throws out Apple's lawsuit against Microsoft
  • 1995-08-24 Microsoft debuts Windows 95
  • 1996-07-15 MSNBC begins Microsoft internet-NBC TV
  • 1996-08-13 Microsoft releases Internet Explorer 3.0
  • 1997-04-08 Microsoft releases Internet Explorer 4 Beta
  • 1997-08-06 Microsoft announces it will invest $150 million in Apple Computer Inc
  • 1997-09-30 Microsoft releases Internet Explorer 4

  • 1997-10-20 US accuses Microsoft of violating pact forcing IE browser on computers
  • 1997-10-22 Compaq testifies Microsoft threaten to break Windows 95 agreement if they showcased a Netscape icon
  • 1997-10-27 Microsoft argues it should be "free from government interference"
  • 1997-12-11 Federal judge orders Microsoft not to bundle IE4 in Windows
  • 1997-12-31 Microsoft buys Hotmail email service for $400 million and re-launches it as MSN Hotmail

Event of interestEvent of Interest

1998-03-03 Bill Gates testifies at Senate Judiciary Committee about Microsoft's dominant position in the software industry

Microsoft Founder Bill Gates
Microsoft Founder
Bill Gates
  • 1998-05-18 United States v. Microsoft: The United States Department of Justice and 20 U.S. states file an antitrust case against Microsoft.
  • 1999-03-26 The "Melissa worm" infects Microsoft word processing and e-mail systems around the world.
  • 2000-01-13 Microsoft chairman Bill Gates steps aside as chief executive and promotes company president Steve Ballmer to the position
  • 2008-06-27 Bill Gates steps down as Chairman of Microsoft Corporation to work full time for the Bill & Melinda Gates Foundation.
  • 2013-03-06 Microsoft is fined €561 by the Euro Commission for the EU for not providing option to chose an alternative web browser
  • 2013-05-21 Microsoft announces the release of Xbox One
  • 2013-09-03 Microsoft purchases Nokia for $7.2 Billion

Event of interestEvent of Interest

2014-02-04 Satya Nadella succeeds Steve Ballmer as CEO of Microsoft

CEO of Microsoft Satya Nadella
CEO of Microsoft
Satya Nadella
  • 2015-07-29 Microsoft launches Windows 10
  • 2019-01-07 Amazon overtakes Microsoft to become the world's most valuable listed company for the first time, worth $797 billion
  • 2019-04-25 Microsoft becomes the third US firm to be listed with a market worth of 1 trillion, after Apple and Amazon

Famous Birthdays


Person of interestPaul Allen

1953-01-21 Paul Allen, American business magnate (co-founder Microsoft, owner Portland Trail Blazers, Seattle Seahawks), born in Seattle, Washington (d. 2018)

Co-founder of Microsoft Paul Allen
Co-founder of Microsoft
Paul Allen

Person of interestBill Gates

1955-10-28 Bill Gates, American businessman and billionaire (founder and CEO of Microsoft, richest person in the world), born in Seattle, Washington

Microsoft Founder Bill Gates
Microsoft Founder
Bill Gates
  • 1957-11-16 Frank Milton "Pete" Higgins II, VP (Microsoft Desktop)

Person of interestSatya Nadella

1967-08-19 Satya Nadella, Indian-American businessman (CEO of Microsoft), born in Hyderabad

CEO of Microsoft Satya Nadella
CEO of Microsoft
Satya Nadella
  • 1981-02-20 Adrián Lamo, American threat analyst and hacker (NYT, Yahoo!, Microsoft) who reported Chelsea Manning to the FBI, born in Boston, Massachusetts (d. 2018)

Famous Weddings


LoveWedding of Interest

1994-01-01 Microsoft CEO Bill Gates (38) marries Melinda French (29)

Microsoft Founder Bill Gates
Microsoft Founder
Bill Gates

Famous Deaths

  • 2018-03-14 Adrián Lamo, American threat analyst and hacker (NYT, Yahoo!, Microsoft) who reported Chelsea Manning to the FBI, dies at 37

Person of interestPaul Allen

2018-10-15 Paul Allen, American business magnate (co-founder Microsoft, owner Portland Trail Blazers, Seattle Seahawks), dies of non-Hodgkin's lymphoma at 65

Co-founder of Microsoft Paul Allen
Co-founder of Microsoft
Paul Allen