/r/Recursion: Recursion - A subreddit for everything recursion-y. - August 20, 2022 - 12:51
/r/automata: Automata - The place to share automata videos, pictures and projects, and ask for suggestions if you want to build your own automaton. - August 19, 2022 - 12:33
/r/mechanical_gifs: 100% Non-Organic .gifs - This sub is for .gif/.gifv/silent .mp4 images that contain a subject matter of mechanical origin. - August 19, 2022 - 01:45