give the exact definition of operating system
is it necessary to load OS in every system to run any
program if so, why?

Answer Posted / hemant chand dungriyal

No exact definition of OS bot OS who can interact user and hardware.
Yes every system wants to OS.Because OS have power of run a iron machine(Example=>Computer hardware).If Computer is single it is a only iron(or group of plastic) but if we install OS it's a World's quickest thing who work for us.(In every automatic stuff has own operating system).

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