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en.wikipedia.org/wiki/Operating_system

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.

www.gcflearnfree.org/computerbasics/understanding-operating-systems/1

Free Tutorial: Get help understanding operating systems in this free lesson so you can answer the question, what is an operating system?

www.webopedia.com/TERM/O/operating_system.html

An operating system (OS) is the most important program that runs on a computer. Computers and mobile devices must have an operating system to run ...

www.computerhope.com/jargon/o/os.htm

Sep 15, 2017 ... An operating system or OS is a software program that enables the computer hardware to communicate and operate with the computer software.

whatis.techtarget.com/definition/operating-system-OS

This definition explains what an operating system (OS) is and how it works and discusses operating systems for different form factors and specific operating ...

www.lifewire.com/operating-systems-2625912

An operating system is computer software that manages hardware and other software. Some operating system examples include Windows, macOS, and Linux .

techterms.com/definition/operating_system

Jul 23, 2016 ... The definition of Operating System defined and explained in simple language.

www.merriam-webster.com/dictionary/operating%20system

Define operating system: software that controls the operation of a computer and directs the processing of programs (as by assigning storage space in …

support.microsoft.com/en-us/help/13443/windows-which-operating-system

Learn which Windows operating system that a PC is running.