Interesting. I wonder why they didn't just move it to somewhere with less radiation? And clearly, they have another more trustworthy machine doing the checking somehow. A self-correcting OS would have to parity check it's parity checks somehow, which I'm sure is possible, but would be kind of novel.

In a really ugly environment, you might have to abandon semiconductors entirely, and go back to vacuum as the magical medium, since it's radiation proof (false vacuum apocalypse aside). You could make a nuvistor integrated "chip" which could do the same stuff; the biggest challenge would be maintaining enough emissions from the tiny and quickly-cooling cathodes.