Operating systems are an essential part of any computer system.It is the most basic system software in computer system.An operating system is system software that manages computer hardware and software resources and provides common services for computer programs.There are several common operating system,such as windows,linux,Mac OS and so on.

We can view a computer system as consisting of hardware,software,and data.The operating system provides the means for proper use of these resources in the operation of the computer system.An operting system is similar to a government.Like a government,it performs no usful function by itself.It simply provides an environment within which other programs can do useful work.