GForth, a popular ANS-Forth implementation, has very extensive documentation: http://www.complang.tuwien.ac.at/forth/gforth/Docs-html/ http://www.complang.tuwie

GForth, a popular ANS-Forth implementation, has very extensive documentation: http://www.complang.tuwien.ac.at/forth/gforth/Docs-html/ http://www.complang.tuwien.ac.at/forth/gforth/Docs-html/ This particular Forth is based on the eForth dialect. There isn't a ton of documentation that I'm aware of, but it's almost entirely self-hosted, and if you can read Forth the source is fairly short and well-commented: http://www.baymoon.com/~bimu/forth/ http://www.baymoon.com/~bimu/forth/ For a gentle introduction to Forth I recommend Starting Forth (http://www.forth.com/starting-forth/ http://www.forth.com/starting-forth/) followed by Thinking Forth (http://thinking-forth.sourceforge.net/ http://thinking-forth.sourceforge.net/), both by Leo Brodie.