A friend posted an interesting map of the network as it grew (his interest was the 1981 map) of Arpanet interconnects. They range from the beginning to at least that map. I can't share that one both because it's on Facebook, and because it was low quality having been bastardized by FB and I couldn't find it online. There are a huge number indexed on google if you care to look. Just put in "arpanet logical map" to get huge numbers of maps. I don't know if anyone has made an index, but with the number there are it would be an interesting exercise to do a chronological and map graph index of the information. Anyway one map caught my eye, showing a "MICRO810" at UCSD. I am hoping maybe it was a Microdata 810, but have no way of looking it up. The box immediately above is B6700, so it may be doing some sort of front end for that system. The node names were said to be IMP names on one of the maps I found, and one would hope that IMP's had all the frontend support to go to most mainframes. thanks Jim January 1975 map on sympatico.ca n.rieck account maybe? http://www3.sympatico.ca/n.rieck/docs/vms_vs_unix.html image link if you can get it to work https://public.dm2301.livefilestore.com/y3pO0l02Dnf4e9HK-IeRoPuXuAFGKavc7GL…