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| | | | | | | Shell | | | | This is the graphical interface of a software application or operating system. For example the shell of Windows operating system is the start button which is a menu-driven system that translates the user's selections into commands. Operating systems like Unix have a variety of shell to choose from such as the C , Bourne and Korn shells which all have a different interface but provides the same commands. | | | |
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