Unix was originally meant to be a convenient platform for programmers developing software to be run on it and on other systems, rather than for non-programmers. The system grew larger as the operating system

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The origins of Unix date back to the mid-1960s when the Massachusetts Institute of Technology, Bell Labs, and General Electric were developing Multics, a time-sharing operating system for the GE-645 mainframe computer. Multics featured several innovations,

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In the late 1980s, an open operating system standardization effort now known as POSIX provided a common baseline for all operating systems; IEEEbased POSIX around the common structure of the major competing variants of the Unix system, publishing the first POSIX

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The Unix system had a significant impact on other operating systems. It achieved its reputation by its interactivity, by providing the software at a nominal fee for educational use, by

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In October 1993, Novell, the company that owned the rights to the Unix System V source at the time, transferred the trademarks of Unix to the X/Open Company (now

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• Comparison of operating systems and free and proprietary software
• List of operating systems, Unix systems, and Unix commands

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The Unix system is composed of several components that were originally packaged together. By including the development environment, libraries, documents and the portable, modifiable source code for all of these components, in addition to the kernelof an operating system,

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