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What is an operating system, and why is it important?
Updated: 06-Jan-2026

An operating system (OS) is system software that manages computer hardware and software resources and provides services for applications. Popular operating systems include Windows, macOS, Linux, and Android. The OS acts as an intermediary between the user and hardware, allowing smooth execution of programs, file management, and device control. It also handles memory allocation, multitasking, and security features. Without an OS, a computer would not be able to run applications or interact with peripherals like printers and keyboards. Therefore, the operating system is crucial for both functionality and usability of a computer.

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