intro to operating system
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Operating system is a hard term to define.An operating system is a program that manages the computer hardware. However, what you consider an operating system depends on your needs and your view of the system. The first view is that operating system is a scheduler/simulator, on this view, the operating system has resources for which it is in charge, responsible for handing them out as well as recovering them later. Resources here include CPU, memory, I/O devices, and disk space. The second view is that operating system is a virtual machine, it means operating system provides a new machine. This machine could be the same as the underlying machine. Allows many users to believe they have an entire piece of hardware to themselves.
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An operating system is software, consisting of programs and data, that runs on computers, manages computer hardware resources, and provides services to run a many programs. Operating system is the major software in computer system. Without an operating system, a user cannot run an application program on their computer, unless the application program is self booting.
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