I had a look at
OSNews.com and found a story about a nifty little
terminal and its OS called Blit.
http://www.osnews.com/story/26315/
Blit_a_multitasking_windowed_UNIX_GUI_from_1982
I suspect getting hold of it would be like getting blood from a
stone, much like getting the Research Unix source trees ... but still
it would be interesting to look at if at all possible.
Wesley Parish