Found this
A dude that manage to boot DOS from a Vinyl disc. it's crazy and awesome at the same time
Link to the blog
http://boginjr.com/it/sw/dev/vinyl-boot/
Link to YouTube
A episode on PLC (Programmable logic controller)
A small propryaty CPU Based computer that can controle intierly factorys whit modular I/O
https://en.wikipedia.org/wiki/Programmable_logic_controller