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Bill Gates (creator) announces Microsoft Windows.
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Microsoft Windows 1.0 is introduced and is initially sold for $100.00.
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Microsoft Windows 2.0 was released and is initially sold for $100.00.
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Microsoft Windows 3.0 was released. 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.
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Microsoft Windows 3.0 or Windows 3.0a with multimedia .
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Microsoft Windows 3.1 was released April, 1992 and sells more than 1 Million copies within the first two months of its release, Price: $79.95.
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Microsoft Windows NT 3.1 in £139.99 + Postage.
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Microsoft Windows XP is released. Initial price:$200.0
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Windows 7 IS REALEASED , with the price of $100.00
