Forth is an imperative stack-based computer programming language and environment originally designed by Chuck Moore. Language features include structured programming, reflection (the ability to examine and modify program structure during execution), concatenative programming (functions are composed with juxtaposition) and extensibility (the programmer can create new commands).

Distributions

There are some FORTH-Enviroments especially for MSX:

• Kuma Forth
• NhForth japanese
• Z80-Forth

Manuals

• FORTH step by step