Microsoft Windows

Microsoft Windows, developed and marketed by Microsoft, is the predominant operating system of the PC platform. Its competitors include Google's Chrome OS and Apple's macOS (and more recently iPadOS).

History
Microsoft co-founder Bill Gates visited and licensed technology from Xerox PARC, as Apple Computer co-founder Steve Jobs had done. Jobs also invited Bill Gates to preview the pre-release development of the Macintosh in 1983. However, Jobs had already been forced out of Apple by the time Microsoft released in November 1995. It was initially running as a shell on top of MS-DOS, Microsoft's existing PC operating system, but would eventually replace it.



Apple lawsuit
After Microsoft released Windows 2.0 with a GUI that was more similar to the Mac, Apple Computer, under then-CEO John Sculley, filed a in 1988 against Microsoft for infringing on its operating system. However, U.S. federal judge dismissed several charges against Microsoft in 1995 after discovering that Sculley had signed off on a deal on November 21, 1985 that had licensed parts of Macintosh technology to Microsoft. After Apple co-founder Steve Jobs returned to the company in December 1996, he negotiated an end to the lawsuits with Microsoft and agreed to cross-license technology between the two companies in exchange for Microsoft's commitment to continue developing software such as Microsoft Office for the Mac and an investment of $150 million in Apple non-voting stock to help keep it out of bankruptcy.

Release history

 * — November 20, 1985
 * 3 — December 9, 1987
 * 1 — March 13, 1989
 * — May 22, 1990
 * — April 6, 1992
 * — July 27, 1993
 * — September 21, 1994
 * Windows NT 3.51 — May 30, 1995
 * — August 24, 1995
 * — August 24, 1996
 * 1.0 — November 16, 1996
 * — June 25, 1998
 * — December 15, 1999
 * — June 19, 2000
 * — August 24, 2001
 * — January 30, 2007
 * — October 22, 2009
 * — October 21, 2010
 * — October 26, 2012
 * — October 17, 2013
 * — July 29, 2015
 * — October 5, 2021
 * — TBA

Articles

 * Intel Macs can't run Windows 11 without this workaround by Wesley Hillard at AppleInsider (2021-06-25)