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Shell (computing)
Computer program that exposes an operating system's services to a human user or other programs / From Wikipedia, the free encyclopedia
In computing, a shell is a computer program that exposes an operating system's services to a human user or other programs. In general, operating system shells use either a command-line interface (CLI) or graphical user interface (GUI), depending on a computer's role and particular operation. It is named a shell because it is the outermost layer around the operating system.[1][2]
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