Interesting - Forth is still my preferred 'fun' language, esp with the more modern versions where you can look into the definitions and pretty much play with the language.
Never tried to do anything SERIOUS with it, mind you. So much easier with other systems.
As for STOIC - er, I've got a CP/M version on a PCW disk. I understood it was related (in some way) to Forth. I assume the version I have will be 8080 rather than Z80. My problem was that I was already into Forth when I got the STOIC, so I never really bothered with it.
Geoff