Beyond computers, GUIs are used in many handheld mobile devices such as MP3 players, portable media players, gaming devices, smartphones and smaller household, office and industrial controls. The actions in a GUI are usually performed through direct manipulation of the graphical elements. GUIs were introduced in reaction to the perceived steep learning curve of command-line interfaces (CLIs), which require commands to be typed on a computer keyboard.
The graphical user interface ( GUI / dʒ iː juː ˈ aɪ/ jee-you-eye or / ˈ ɡ uː i/ ) is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, instead of text-based user interfaces, typed command labels or text navigation. The interim Dynabook GUI (Smalltalk-76 running on the Xerox Alto)
