GUI stands for Graphical User Interface. This means that the interface is designed by using Graphics for better user experience.
Rather than using text-based user interfaces, text navigation or typed commands, GUI allows users to relate with electric devices like computers, hand-held devices, and other appliances by using graphical images, menus, windows and visual pointers like secondary symbolization to display information and related user controls.
It allows users to manipulate components and elements on the screen using pointing devices such as a mouse, finger on a touch screen, stylus, or a trackball.
GUI often functions through manipulation of the graphical components. Apart from computers, GUIs are used in other portable devices including portable media players, MP3 players, smartphones, gaming devices, among other domestic, workplace and accessories.
However, GUI is rarely used in the low-display resolution interfaces like video games, flat screens or volumetric displays. This is because the term is limited to the range of two-dimensional screens that enables it to describe generic information. Head-up Display (HUD) is preferred instead.