Evolution of the Universe

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Submitted By bjamesbryant
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UNIX, Linux, Mac, and Windows OS Comparison Paper
B. James Bryant

UNIX, Linux, Mac, and Windows OS Comparison

In 1956, General Motors produced the first OS for its IBM 704 series mainframe. Since then companies around the world, both big and small, have been tirelessly researched, testing, and releasing newer and faster operating systems for the world to use. Among these are systems developed by/for UNIX, Linux, Microsoft, and Apple. In fact, it’s safe to say that these four companies have a monopoly on all current technology used in both the military, corporate, and private sectors all around the world.

UNIX Operating System Unix operating systems have the ability to be multi-user, multi-tasking and portable. Multi-user capabilities are accomplished through time sharing which means the processor allocates slices of time to first one process and then the next, sharing the available time in sequence with waiting processes (Nagpal, 2009). Unix can run in either command line interface, CLI, or graphic user interface or GUI mode. A key and unique feature of Unix is that it has a modular design which allows parts of the system to be added or removed without affecting performance of the other parts making Unix systems highly customizable. Unix operating systems have four core components, (1) the kernel, (2) the shell, (3) the file system, and (4) the utilities or tools and applications (Love et al, 2005). The kernel is the lowest layer of the operating system that controls computer resources and allocates them to system users and tasks. The shell is the next layer and is a command line interpreter that enables the user to interact with the system. Shells are used to directly administer and run the system. The file system allows users to view, organize, secure and interact with the files and directories stored on the system and storage devices. Unix…...

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