The plasma terminals were nice, but I also liked the
bitmap graphics
terminals. For those, with PLATO, you could write code in "micro
tutor" or "ututor" which you would load into the terminal and it would
execute locally. Some of the best PLATO based games had all the
display stuff written in ututor and the networking and game logic
stuff was written in tutor and coordinated the different terminals.
What was that, a mini-programming language? Was it the internal machine
language of the terminal itself (being fairly ignorant of the architecture),
or a microcode, or ... ?
In the PLATO system, you wrote software in a language specifically
designed for the computer assisted instruction environment of PLATO.
The language was called "tutor". A very brief entry about it is on
wikipedia: <http://en.wikipedia.org/wiki/TUTOR_programming_language>.
A book that describes the tutor language in detail is here:
<http://www.group-s.net/TUTORLanguage.htm>.