I am trying to remember the apollo systems I was administrating in about 1984 while I worked for CALMA. They were very large, slightly smaller than a 3 foot cube, They had very large monochrome displays (21") and ran an os known as appollo domian, which was very unix like. They keyboards all had touch pads. The systems were connected via the same type of coax used in cable tv. They were connected in a loop. One system had a open reel tape drive, one of the slide in reel types that threaded itself. There may have been a color version too.