Operating System
An operating system (OS) is system software that manages computer hardware and software resources, and provides common services for computer programs.As of November 2025, Android is the most popular operating system, with a 38% market share, followed by Microsoft Windows at 33%, iOS and iPadOS at 15%, macOS at 4%, and Linux at 1%. Android, iOS, and iPadOS are operating systems for mobile devices such as smartphones, while Windows, macOS, and Linux are for desktop computers.