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What is an Operating System ? An operating system (OS) is a software program that serves as the foundation for running applications and managing computer hardware. It is a crucial component of any computing device, be it a personal computer, smartphone, tablet, or server. The primary purpose of an operating system is to provide an interface between the user and the underlying hardware, enabling users to interact with the computer and execute various tasks efficiently. It manages system resources, including memory, processing power, storage devices, input/output (I/O) devices, and network connectivity. Some of the key functions of an operating system include: 1. Process management: The OS manages and schedules processes (programs in execution), ensuring that each process receives the necessary resources and runs smoothly. 2. Memory management: It allocates and tracks memory resources, allowing multiple programs to run simultaneously without interfering with each other. 3. File system ma