Question

why do we need operating system​

Answer 1

An operating system (or 'OS') controls the general operation of a computer, and provides an easy way for us to interact with computers and run applications. On some computers it is possible to run a choice of operating systems.

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Answer 2

Answer:

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An operating system is the most important software that runs on a computer. It manages the computer's memory and processes, as well as all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer's language.