Exploring early GUIs

[Michael Kerpan]

Something in another recent thread about LISP machines got me wondering:
how many early graphical systems are well emulated (or emulated at all)? I
know that there are more or less functional emulations of Alto, Star, and
Lisa out there, but what about the various LISP machines or the early
workstations (Sun 68K, Apollo, etc) Also, assuming that there are emulators
for some of these systems out there, has any software to run on them and
been archived?

Mike