What is an Operating System? 1.What if there is no interface to the key board? 2 What if there is nothing that will control the output to VGA card? 3. What if there is no interface to the human user so that he can switch on"MS Word“? Yes the answers to all these questidns is operating system. Technical Definition:An OS is a collection of system software that coordinates between the hardware,provides a platform for softwares to run on and provides the user with an interface for command inputs. DOS,Linux,Unix,Windows,MAC,OS/2,Minix,and many more. The governmental systems like Postal system,Railway System are analogous to Operating Systems.1. What if there is no interface to the key board? 2. What if there is nothing that will control the output to VGA card? 3. What if there is no interface to the human user so that he can switch on “MS Word “ ? Yes the answers to all these questions is operating system. Technical Definition: An OS is a collection of system software that coordinates between the hardware, provides a platform for softwares to run on and provides the user with an interface for command inputs. DOS, Linux, Unix, Windows, MAC, OS/2, Minix, and many more. The governmental systems like Postal system, Railway System are analogous to Operating Systems. What is an Operating System?