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First 25 years of Microsoft
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In 1975, Gates and Allen form a partnership called Microsoft.
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In June 1980, Gates and Allen hire Gates’ former Harvard classmate Steve Ballmer to help run the company.
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Microsoft made a operating system and called it MS-DOS.
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Microsoft's new operating syste, MS-DOS, ships in 1981.
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Windows 1.0 was anounced.
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On November 20, 1985, two years after the initial announcement, Microsoft ships Windows 1.0.
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On December 9, 1987 Microsoft releases Windows 2.0 with desktop icons and expanded memory.
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On May 22, 1990, Microsoft announces Windows 3.0
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Windows 3.1 released
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Windows NT was released.
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In the summer of 1995, the first version of Internet Explorer is released.
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On August 24, 1995, Microsoft releases Windows 95, selling a record-setting 7 million copies in the first five weeks.
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In 1996, Microsoft releases Flight Simulator for Windows 95.
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Released on June 25, 1998, Windows 98 is the first version of Windows designed specifically for consumers.
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On October 25, 2001, Windows XP is released with a redesigned look and feel that's centered on usability and a unified Help and Support services center.
