Kay Savetz tells the story in this 15 minute video from KansasFest 2021 (the 33rd annual) of how he came to acquire, capture, and publish 100s of floppies of source code, written in Forth for Apple II.

Here are the repositories. Much scientific and educational content. (This may not be the whole hoard.)

via François Revol and/or via Carsten Strotmann.