Fundamentals of O.S.

An operating system is a set of programs that manage computer hardware

resources and provide common services for application software.

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Operating system is not a vital component of the system software in a computer system. Application programs require an operating system which are usually separate programs, but can be combined in simple systems.

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Time-sharing operating systems schedule time for efficient use of the system and may also include accounting for cost allocation of processor time, mass storage, printing, and other resources.

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For software functions such as input and output and memory allocation, the operating system acts as an intermediary between application programs and the computer hardware.

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Operating systems are found on almost any device that contains a computer—from cellular phones and video game consoles to supercomputers and web servers.

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