system
A chat on subreddit /r/PoliticalCompassMemes
human
A lot of what's in it is either outdated, useless, or inaccurate.  

The only purpose for one now is to have it as a curiosity piece. There's plenty of old army TMs/FMs that have better and accurate info. Great for the collector of militaria.
gpt
I only have the Wilderness survival ones sadly. 

Well that and the M16 manual.