= Operating system is an interpreter between user and computer. It is a collection of programs which acts as an interface between computer hardware and the user, and controls the execution of all types of programs.
It performs the following major functions:
(i) Controls and co-ordinates the various resources of a computer, such as memory, secondary storage, input, output devices etc.
(ii) Permits the user to create, print, copy, delete, read and write the files.
(iii) Co-ordinate between software and hardware.
(iv) Preventing the system from unauthorized user, computer viruses etc.
(v) Translating programs from one form in to another form.
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