The original EPROM spec
Actually included X-ray erasure because UV light wouldn't do the trick.
I hear that NASA still used 25+ year old CPUs (8086) in their Shuttle solid rocket boosters and have to trawl online auctions for new-in-box chips because they aren't made any more.
The Russian versions do work but aren't quite similar enough for legacy code which has to work 100% of the time.
The ISS still runs on decades old technology and the laptops are still Pentium based because none of the modern CPUs <ie sub 100nm) will run for long in space without crashing.
Biting the hand that feeds IT
