Abstract A batch operating system is converted to a Foreground/Background Operating System (FBOS) for use on a Varian 620/f Minicomputer system. Entry to port #1 (the foreground) is via an interrupt generating graphics console facilitating user interaction with computer applications software packages. Port #2 (the background) is the entry to the batch operating system. Although the system which is developed supports a specific graphics console (Information Displays Inc. - Idiom 1.2) and a...