< <There was a Byte Press book "Threaded Interpreted Languages" <from back then. I have it on the shelf at the office, if you <want the ISBN number. Thats it. The ISBN number is likely useless by now. The articles were supposed to get you to a working language but I never saw them all. I've been thinking about languages and OSs and building one for myself figuring what I'd seen back then may help. I'm still leaning toward OS/8 RTS-8 as models. Target cpu is of course z80. Though DEC T-11 would make a good forth engine. Allison