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Bill Gates announces Microsoft Windows November 10, 1983.
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Starting with good earnings, Microsoft Windows 1.0 is introduced in November 20, 1985 and is initially sold for $100.00.
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Microsoft Windows 2.0 was released December 9, 1987 and is initially sold for $100.00.
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Microsoft Windows/286 or Windows 286 is introduced June, 1988 and is initially sold for $100.00.
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Microsoft Windows 3.0 was released May, 22 1990. Microsoft Windows 3.0 full version was priced at $149.95 and the upgrade version was priced at $79.95.
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Following its decision not to develop operating systems cooperatively with IBM, Microsoft changes the name of OS/2 to Windows NT.
Microsoft Windows 3.0 or Windows 3.0a with multimedia was released October, 1991. -
Microsoft Windows for Workgroups 3.1 was released October, 1992.