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On April 4 in 1975 Microsoft Corporation was founded by Bill Gates and Paul Allen
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From 1975 to 1985 Micrsoft was writting Operating Sytems for IBM the Operating System BASIC and for Linux the OPerating System XENIX and others.
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On November 20 1985 Windows 1.0 was released. Ths was Microsoft first independent Operating System as a stand alone company. It was not command based like the other Operating Systems of the time.
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On December 9 1987 Windows 2.0 was released. It was the Succesor to Windows 1.0
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On May 27 1988 Windows 2.1x was released . It was released less than its predecessor Windows 2.0.
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On May 22 1990 Windows 3.0 was released. It was said to have a more user frendly interface, it was the Successor to Windows 2.1x.
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On April 6 1992 Windows 3.1x. It was the Successor to Windows 3.0.
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On April 24 1995 Windows 95 was released. It was said to have been the biggest progression over the Windows Operating Systems.
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On May 15 1998 Windows released Wndows 98. It was the Second Major Release in the WIndows 9x line of Operating Systems.
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On Febuary 17 2000 Windows 2000 was released. It was the frst Windows released in the New Millenium.
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On September 14 in 2000 Windows released Wndows Me. The Me stood for Millenium Edition. It was a Windows dedicated to the new Millenium.
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On October 25 2001 Windows released Windows XP. This Windows had a Series of Updates called Service Pakcs.
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On November 15 2001 the XBOX was released. It was a very significant jump for Microsoft because it was there frst game console.
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On November 22 2005 the XBOX 360 was released. Ths was very significant in Microsoft history. This game console was rated the number one console of 2012
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On January 30 2007 Windows Vista was released. It came with a seres of Service Packs also. This Windows also came with four different versions Basic, Premium Home, Business, and Ultimate Edition.
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Sometime in July of 2008, Bill Gates resigned as Micrsofts CEO the but stayed Chairman.
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On October 22 2009 Windows 7 was released. It was Succesor to Windows Vista. It also came in versions. They where Windows 7 Starter, Home Basic, Home Premium, Professional, Enterprise, and Ultimate.
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Windows 8 is in the procces of creation and is rumored to come out this October of this year, but the release date is uncertain.