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Linux is a family of open souce systems, which means that they can be modified and distributed by anyone around the world.
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Operating systems for mobile devices generally are as fully-featured as those made for desktop or laptop computers.
Without an operating system, a user can not run an application program on their computer.
The three most common operating systems for personal computers are Microsoft WIndows, Apple Mac OS X, and Linux.
Embedded operating systems are designed to be used in embedded computer systems.
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