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November 20, 1985, Window 1.0 verson of PC had been released. They cost between $1500~$2500 in mid 80s. http://windows.microsoft.com/en-us/windows/history#T1=era0
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In 1987, December 9, the second generation of Window has been released. Verson 2.0-2.11.
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The company were able to sell 10 million of copies in first two years. they started to make better graphics.
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In August 24, Windows 95 was released. 7million of copies were sold in first five weeks. This computer spread worldwide.
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In June 25, WIndows 98 was desinged for consumers, they were common at work, home, and internet cafes.
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October 25, 2001, WIndows XP was released with 25 different laguage and redisingned. Nearly 1Billion of copies had been shiped to worldwide. WIndows XP was the best selling product in the year.
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In January 30, 2007 Windows VIsta had been released with strongest secruity, it provided better protection for the Windows Computer. They had made better graphics such as games, video, and others. They cost around $240.
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In October 22, 2009, A different versison Windows 7 was published. WIndows 7 was common to connect to hotspot, or Wifi in cofe shops. They cost around $220.
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October 26, 2012, Widnows 8 Pc was published with different graphics. WInodws 8 were working smoothly on mouse and keyboards, they could download apps like android.
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Microsoft says that Windows 10 will be the last verzion of Microsoft Windows PC.
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On July 29, 2015 Windows 10 was published with android/ ois apps were availible on the new OS. They replaced Internet Explorer as WIndows 10. They cost around $120.
