An operating system (commonly abbreviated to either OS or O/S) is an interface between hardware and applications; it is responsible for the management and coordination of activities and the sharing of the limited resources of the computer. The operating system acts as a host for applications that are run on the machine.
Operating systems offer a number of services to application programs and users. MS -DOS, Windows vista, Unix, Xenix, Linux, Mac O.S. 10.5 Leopard, Windows NT, Windows XP, Microsoft 2000 Professional are some of the best operating systems. Embedded device markets are split amongst several operating systems.
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