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Microsoft disc operating system was created for IBM in 1981.
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Apple OS was the first hugely popular personal computer operating system.
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Microsoft Windows was one of the first good personal computer operating system. It competed with Apple OS
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Linux OS was created by Linus Torvalds. He was a Finnish college student studying at the University of Helsinki. Torvalds originally made it as a hobby project.
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Apple iOS was the operating system used in the first smartphone.
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Android OS was first released in 2008 as a response to the iPhone.
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Chrome OS is an interesting operating system. It doesn't run traditional applications, instead it just has the chrome browser.
