"John Seamons of Lucasfilm brought up Jim
Gula's MIT Nu Unix on the Sun.
We have an Ethernet based version of this Unix running at Stanford"
Vaughan Pratt on fa.works, Jan 1982
https://groups.google.com/g/fa.works/c/WHpSvlbG0A8/m/IUdSUIwJqAgJ
https://www.saildart.org/WORKS.MSG[UP,DOC]28
Since I've never seen the design for the original Nu 68K I wonder if
that was where the "SUN" segment/page MMU came from, since it looked
similar to what was in the CADR, and if the sniffing of the stack to
see if it needed to grow on function calls came from the Terman compiler.