In computing, a graphical user interface (GUI) is a type of user interface that allows users to interact with electronic devices with images rather than text commands.GUIs can be used in computers, hand-held devices such as MP3 players, portable media players or gaming devices, household appliances and office equipment .

Yesterday,one of my friends was drawing a prototype  on a piece of paper and when i asked her about it,she said it’s an application interface for one of her clients.It was something like a equalizer dashboard.