On Fri, Dec 06, 2019 at 12:33:38PM -0500, Noel Chiappa wrote: > Interesting; I also have a large collection of maps: > > http://mercury.lcs.mit.edu/~jnc/tech/arpanet.html#Maps And there it is, October 1981, UWISC is on the arpanet. Looks like there were about 70 IMPs at the time. This is awesome info Noel, thanks!