GUI

Graphical User Interface

A GUI (usually pronounced GOO-ee) is a graphical (rather than purely textual) user interface to a computer. The command interface of the DOS operating system ("Command Prompt") is a typical user-computer interface before GUIs arrived. An intermediate step in user interfaces between the command line interface and the GUI was the non-graphical menu-based interface, which let you interact by using a mouse rather than by having to type in keyboard commands. Today's major operating systems provide a graphical user interface.

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