If you look at the table you'll see that the 3620 from Symbolics in 1986 was an entirely different system. It had a megapixel bitmap-only screen as a separate c

If you look at the table you'll see that the 3620 from Symbolics in 1986 was an entirely different system. It had a megapixel bitmap-only screen as a separate console (which had mouse, keyboard, serial and an audio interface) with console cables often of 30 meters. The refrigerator size machines often would be running in some machine room and the console would be used in some office room. The console was handled by a separate Front End Processor with a communication protocol over the console cable. An entirely different technology for a different setup. Later Symbolics Lisp machines used different technology for the graphics system, but basically the same console setup. See here for some more info about the 3620: http://lispm.de/3620/3620.html http://lispm.de/3620/3620.html