A user interface is the method by which the user and the computer exchange information and instructions. There are three main types - command-line, menu driven and graphical user interface (GUI).

command line interface (CLI) A graphical user interface is familiar to most users of PCs and laptops. GUIs feature a desktop where everything is displayed.

Colin Walters of Red Hat chaired a FOSSCamp session about Hotwire, a unique and innovative graphical shell environment designed to improve the command-line user experience. I've been testing ...