Operating System and structure of OS


 “An operating system is a program that acts as an intermediary between the user and the computer hardware and controls the execution of all kind of programs”

       An operating system is a program that manages the computer hardware. It also provides a basic for application program and acts as an interface between the computer user and the computer hardware.
    Operating systems for handheld computers are designed to provide an environment in which a user can easily interface with the computer to execute programs. Thus, some operating systems are designed to be convenient, others to be efficient, and others some combination of the two.
     Because an operating system is large and complex, it must be created piece of piece. Each of these pieces should be a well-delineated portion of the system, with carefully defined inputs and outputs and functions.
Linux, UNIX, Windows, OS X, VMS, OS/400, AIX, Z/OS, etc are the few operating systems. 


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