Source code for the Action! programming language for the Atari 8-bit computers, version 3.6, released under GPL by the author, Clinton Parker.
Action! is a programming language and development environment with an integrated editor, debugger, and 6502 compiler for the Atari 8-bit family of microcomputers. It was created by Clinton Parker and released on cartridge by Optimized Systems Software in 1983. The language's syntax is similar to that of ALGOL 68.