Operating system

An operating system, or OS, is system software that manages computer hardware and software resources and provides common services for computer programs. It acts as an intermediary between programs and computer hardware, handling functions such as input and output, memory allocation, and task scheduling, and is found on devices ranging from cellular phones and game consoles to web servers and supercomputers. As of November 2025 Android held the largest share of the operating system market at 38 percent, followed by Microsoft Windows at 33 percent and iOS and iPadOS at 15 percent, with Linux distributions dominant in the server and supercomputing sectors. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/