The term 'Graphical User INTERFACE' (GUI) is a type of user INTERFACE that allows users to interact with electronic devices through graphical icons and visual indicators. It is used in many different types of software, such as operating systems, web browsers, and mobile applications. GUI's are designed to make it easier for users to access and use the features of a device or program. They provide a more intuitive way of interacting with the device or program than traditional command-line interfaces.