GUI - graphical user interface - Abbreviated GUI (pronounced GOO-ee). A program interface that takes advantage of the computer's graphics capabilities to make the program easier to use. Well-designed graphical user interfaces can free the user from learning complex command languages. On the other hand, many users find that they work more effectively with a command-driven interface, especially if they already know the command language.
Basic Components of a GUI
Graphical user interfaces, such as Microsoft Windows and the one used by the Apple Macintosh, feature the following basic components: