'From Bubble Memory to Hot Spots and a Fly Rod'
 

https://www.nytimes.com/2019/04/03/t...-security.html amused me. I remember bubble memories for microcomputers.

I have a plane of core memory sitting in my office. And yes, it came from a machine I worked on ...

You have an actual core dump. I used to have a few cores; they seem to have disappeared, probably in a move.