Retro gaming is having a huge revival right now, with hardware emulating classic consoles so you can use original cartridges, to emulators to create retro PCs, and Atari releasing a modern version of the 7800 from the mid-80s for you to use any old cartridges you still have in the attic. It’s a fantastic time to be a classic gaming fan, but what about the operating systems that we used to use?