Tags: Genre, Music Genre, Topical Concept.
In computing a shell is a user interface for access to an operating system’s services. Generally operating system shells use either a command-line interface (CLI) or graphical user interface (GUI). Mac OS and Windows are widely used operating systems with GUIs.The optimum choice of user interface depends on a computer’s role and particular operation. CLIs allow some operations to be performed faster rearranging large blocks of data for example.