The abbreviation of Operating System is OS. Operating system is generally known as an interface between users and hardware device. Operating system is liable for administration and management of different activities and sharing of the resources of your Personal Computer. This program acts as a host for applications that are currently running on the computer system. Operating systems of a computer handle all the details of operations on any hardware device in the computer. There are different types of operating systems that are used by the various types of computers including desktop computers, handheld computers and supercomputers.