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en.wikipedia.org/wiki/Unix

Unix is a family of multitasking, multiuser computer operating systems that derive from the .... modifiable source code for all of these components, in addition to the kernel of an operating system, Unix was a self-contained software system.

en.wikipedia.org/wiki/Operating_system

An operating system (OS) is system software that manages computer hardware and software ... dedicates a slot to each of the programs. Unix-like operating systems, e.g., Solaris, Linux, as well as AmigaOS support preemptive multitasking.

www.lifewire.com/operating-systems-unix-vs-windows-2180225

Sep 13, 2017 ... An operating system (OS) is a program that allows you to interact with the computer -- all of the software and hardware on your computer. How?

www.computerhope.com/os.htm

Sep 15, 2017 ... Computer operating system help and information with links to all the major computer operating systems including all versions of Windows, Linux, Unix, and ... Without a computer operating system, a computer and software ...

www.lifewire.com/operating-systems-why-unix-2200178

Oct 3, 2017 ... An operating system (OS) is a program that allows you to interact with the computer -- all of the software and hardware on your computer. How?

www.encyclopedia.com/science-and-technology/chemistry/compounds-and-elements/operating-systems-software

Get information, facts, and pictures about Operating systems (Software) at ... A computer's operating system is one of the most important “parts” of the computer. ... Microsoft Windows, Mac OS, and Linux are three well-known examples of this ...

kb.iu.edu/d/agat

Oct 10, 2017 ... Officially licensed Unix operating systems (and their vendors) include OS X ... Unix also was developed as a self-contained software system, comprising ... At Indiana University, the Big Red II research computing system runs a ...

www.britannica.com/technology/UNIX

Aug 24, 2017 ... UNIX: Multiuser computer operating system. UNIX is ... UNIX, eventually creating a version of UNIX called Berkeley Software Distribution (BSD).

en.wikibooks.org/wiki/Introduction_to_Computer_Information_Systems/System_Software

It is very similar to other operating systems, such as Windows and OS ... core part of Linux), system library (special functions or programs), ...