Action! - for Atari by OSS Precision Software - Programming Language Cartridge with Manual.
Action! is a procedural programming language and integrated development environment written by Clinton Parker for the Atari 8-bit computers. The language, similar to ALGOL, maps cleanly to the MOS Technology 6502 of the Atari computer without complex compiler optimizations. Fast execution speed of the resulting programs was a key selling point.
Included are the Action! cartridge as well as a 200+ page manual in loose leaf 3-ring hard-cover notebook.
As always, Please feel free to ask any questions or raise any concerns and I will try to respond promptly.