Operating System

An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. The operating system is a vital component of the system software in a computer system.

 It is a middleware between user and software ,hardware of computer system.

Operating system is  a complex software code.

Without operating system we can  not use software, application programs.

Main functions of operating systems are:

·        Memory Management

·        Processor Management

·        Device Management

·        File Management

·        Security

·        Control over system performance

·        Job accounting

·        Error detecting aids

·        Coordination between other software and users

·        System booting