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While the term personal computers (PCs) most frequently refers to a desktop personal computer, PCs also include laptop and notebook computers, tablet devices, smartphones and other handheld PCs. Desktop and laptop PCs run operating systems like Microsoft Windows, Mac OS X, Linux or Unix, while handheld PCs tend to run mobile operating systems including Apple iOS, Google Android, Microsoft Windows Phone, Blackberry or similar.

From the earliest PCs such as 1981's IBM PC to the latest handheld personal computers like the iPhone and Android devices, our PCs dictionary offers a glossary of key terms you need to know.

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