On November 10, 1983, Microsoft announced Windows, a graphical user in... - dofaq.co
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On November 10, 1983, Microsoft announced Windows, a graphical user in...

wikipedia - 29 Sep 2015
On November 10, 1983, Microsoft announced Windows, a graphical user interface (GUI) for MS-DOS and a competitor to the Macintosh operating system. The product line eventually changed from a mere GUI for DOS into a fully complete, modern operating system over two lines of development, each with their own separate codebase.

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