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.

edu.gcfglobal.org/en/computerbasics/understanding-operating-systems/1

An operating system is the most important software that runs on a computer. It manages the computer's memory and processes, as well as all of its software and  ...

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/os.htm

Jan 24, 2018 ... An operating system or OS is a software on the hard drive that enables the computer hardware to communicate and operate with the computer ...

www.lifewire.com/operating-systems-2625912

Aug 30, 2018 ... An operating system is computer software that manages hardware and other software. Some operating system examples include Windows, ...

computer.howstuffworks.com/computer-operating-systems-channel.htm

Operating systems help computer hardware and software communicate with each other. Although you're seeing some of what your OS does, it manages many  ...

computer.howstuffworks.com/operating-system.htm

Most desktop or laptop PCs come pre-loaded with Microsoft Windows. Macintosh computers come pre-loaded with Mac OS X. Many corporate servers use the ...

turbofuture.com/computers/software-os

Read reviews about the best software to use as well as the pro and cons of various operating systems to know what is the best fit for you.

smallbusiness.chron.com/five-common-operating-systems-28217.html

Aug 3, 2018 ... Most computers and smartphones come with an operating system installed on ... That's the core software on the computer that sits between ...