Check out the Oberon OS TUI sometime. https://en.m.wikipedia.org/wiki/Oberon_(operating_system)#User_interface https://en.m.wikipedia.org/wiki/Oberon_(operatin

Check out the Oberon OS TUI sometime. https://en.m.wikipedia.org/wiki/Oberon_(operating_system)#User_interface https://en.m.wikipedia.org/wiki/Oberon_(operating_system)#Us... (Oberon's GUI represents one of the paths not followed by mainstream computing-a non WIMP approach) couple of notable features. Tiled, not overlapping windows. All three mouse button combinations have meaning (select, copy & paste can be done without a keyboard). Any text can be higlighted and executed. GUI approach is document based, with everything a text and texts being mostly, um, textual... I cant find a nice writeup to link to, but there used to be a vm available.