WHY OS and WHAT is OS :)

WHAT is an operating system ??

1. OS is made up of System Software .
2. OS is a piece of software that manages all the resources of a computer system ,both hardware and software.
3. OS provides an environment in which the user can execute his/her programs in a convenient and efficient manner .
4. Other than this OS acts as an interface between user and computer H/W by helping user to Access computer H/W . And It hides complexity of H/W.