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| | Graphical User Interface |
 | | A graphical user interface (GUI, pronounced "gooey") is a computer environment that simplifies the user's interaction with the computer by representing programs, commands, files, and other options as visual elements, such as icons, pull-down menus, buttons, scroll bars, windows, and dialog boxes. |
 | | By selecting one of these graphical elements, through either use of a mouse or a selection from a menu, the user can initiate different activities, such as starting a program or printing a document. |
 | | Prior to the introduction of GUI environments, most interactive user interface programs were text oriented and required the user to learn a set of often complex commands that could be unique to a given program. |
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