@trent@vampiress I once had a housemate whose hobby was collecting old Unix computers, and we had an 11/780 in the kitchen.
His pride and joy was a Multimax 310, which was a 1980s supercomputer designed to support hundreds or perhaps thousands of users. His had 8 CPUs and about a gigabyte of RAM, which was not quite fully loaded but pretty close.
The Multimax corporation designed the Annex terminal servers as a way of getting lots of users onto a machine that only had four serial ports. The Annex product was divested to Encore, which sold it to pretty much every Uni in Australia in the late 1980s. If your Uni had Sun or DEC compute resources, you probably accessed them on an RS-232 terminal connected to an Annex.
(We had several in the house for incoming modem lines)