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

This is a list of operating systems. Computer operating systems can be categorized by technology, ownership, licensing, working state, usage, and by many other characteristics. In practice, many of …

This article presents a timeline of events in the history of computer operating systems from 1951 to the current day. For a narrative explaining the overall developments, see the History of operating systems.

An operating system (OS) is a kind of computer program that helps a computer to interact with other machines or with people. An OS is not actually one single program but a group of small programs, …

Jan 16, 2026 · Operating system, program that manages a computer’s resources, especially the allocation of those resources among other programs.

Apr 9, 2025 · At its core, the operating system is a set of software that manages hardware resources and provides essential services for other software. It acts as an intermediary between the user and …

Jul 23, 2025 · An operating system is a type of software that acts as an interface between the user and the hardware. It is responsible for handling various critical functions of the computer and utilizing …

Apr 7, 2025 · An operating system or OS is software installed on a computer's hard drive that enables the computer hardware to communicate and operate with the computer software.

What is an operating system? An operating system (OS) is a collection of software that manages a computer’s hardware and applications by allocating resources, including memory, CPU, input/output …

Nov 28, 2025 · At its core, the operating system is what makes your computer more than wires and chips—it’s what makes it yours. It organizes, protects, and powers everything you do.