https://i.imgur.com/7hSaVVf.png
By this time Illiac IV had been connected to ARPAnet since Nov-1975.
The Illiac IV had various supporting systems: Burroughs B6700, DEC PDP-10 and PDP-11s.
Map is from this document: https://apps.dtic.mil/dtic/tr/fulltext/u2/a482154.pdf
