The Desktop can be controlled using a joystick, mouse, trackball or light-pen. There is no command line. The user interface is graphical, you click on icons and files to select them for subsequent actions.
Applications can call the GUI as a subroutine. FutureOS is said to be easy to handle, after learning how to work with it. The icons are fixed, so you will always work with the same desktop.
== File system ==