What is the English Meaning of Graphical User Interface?
A graphical user interface (GUI) is a type of user interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, instead of text-based user interfaces, typed command labels or text navigation. 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 actions in a GUI are usually performed through direct manipulation of the graphical elements. 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 term GUI tends not to be applied to other lower-resolution types of interfaces, such as video games, or not including flat screens, like volumetric displays because the term is restricted to the scope of two-dimensional display screens able to describe generic information, in the tradition of the computer science research at the Xerox Palo Alto Research Center.
The GUI has become an important part of modern operating systems, and is used in all desktop, laptop and tablet computers, as well as in many mobile devices. A GUI uses a combination of technologies and devices to provide a platform that users can interact with, for the tasks of gathering and producing information.
The design process of a GUI is guided by certain principles such as visibility, recognizability, efficiency, robustness and flexibility. Visibility refers to the visual feedback provided by the interface, which should be clear and concise. Recognizability refers to how quickly users can recognize the elements of the interface. Efficiency refers to how quickly users can complete the tasks they are trying to accomplish. Robustness refers to how well the interface can handle unexpected input and errors. Flexibility refers to how easily the interface can be adapted to different tasks.