Graphical user interface (GUI)
From The Glossary of Digital Photography
A computer interface that uses graphical icons instead of words to represent data files and folders, programs, and other objects used to interact with the computer. Anyone who has used a desktop computer is familiar with the concept, even if he or she is not familiar with the name. The first implementation of GUI (sometimes pronounced 'gooey') was on Apple's Lisa computer. It was too expensive, so it did not catch on. Instead, the Macintosh computer came out in 1984, bringing with it the first popular implementation of GUI. Apple copied the idea from the early Xerox Alto computer. Later on, Microsoft used Apple's ideas to create the first Windows operating system. GUIs are one of the things that make personal computers easier to use than the early minicomputers.
