Absolutely fascinating. I found a link in one of the linked discussions which is quite a bit more in depth than the ieee article, for those interested: https:

Absolutely fascinating. I found a link in one of the linked discussions which is quite a bit more in depth than the ieee article, for those interested: https://www.cryptomuseum.com/covert/bugs/selectric/ https://www.cryptomuseum.com/covert/bugs/selectric/