Graphical User Interface. 1.Used to refer to software applications that are easier to use than their text-based predecessors. GUI programs use icons, toolbars, taskbars and other friendly, point-and-click functions.2. A computer environment or program that displays, or facilitates the display of, on-screen options, usually in the form of icons (pictorial symbols) or menus (lists of alphanumeric characters) by means of which users may enter commands. Options are selected by using the appropriate hardware (e.g., mouse, designated keyboard keys, or touchpad) to move a display cursor to, or on top of, the icon or menu item of interest. The application or function so represented may then be selected (e.g., by clicking a mouse button, pressing the “enter” key, or by touching the touchpad)

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