This time we are diving back into the Jargon File to take a look at some hacker folklore. Back in the day hackers at MIT spent their time spying on one another's terminals. That is, until some intrepid programmer found a way to fight back.
Selected Sources:
http://www.catb.org/esr/jargon/html/os-and-jedgar.html - OS and JEDGAR
https://github.com/PDP-10/its - ITS restoration project