Operating System is a master program that controls a computer's basic functions and allows other programs to access the computer's resources such as disk drive, printer, keyboard, and screen.We can define Operating system in following terms.........
The operating system is the most basic program in a computer. All computers have an operating system that among other things is used for starting the computer and running other programs (application programs)
A series of computer programs which control the operation of the computer itself. Application programs such as GIS software run under an operating system. Examples of operating systems include MS Windows 95, MS Windows NT, UNIX, VMS, DOS and OS/2.
Software that shares a computer system's resources (processor, memory, disk space, network bandwidth, and so on) between users and the application programs they run. Controls access to the system to provide security.
The main control program of a computer system. It is a system of programs that controls the execution of computer programs and may provide scheduling, debugging, input/output control, system accounting, compilation, storage assignment, data management, and related services.
The C5 operating system provides a set of interfaces that enables you to run applications on various hardware configurations. It contains the microkernel, board support package and higher level services, including I/O and file system support.
Software that controls a computer and acts as a layer between the hardware and the applications and users. (eg. Linux, Windows, Mac OS X, Unix); Software that provides a simple environment for programmers and end users to work more efficiently (shell, command interpreter)
SO we can say Operating System is a program which acts as an interface between a user of a computer and the computer hardware
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