My first job in the early '80's was for a phototypesetter manufacturer. Logically, the NSA had one of our machines for in-house use. Whenever there was a issue

My first job in the early '80's was for a phototypesetter manufacturer. Logically, the NSA had one of our machines for in-house use. Whenever there was a issue with the machine I flew up to Virginia to look at it. My experience was roughly the same as the article's, super-nice people, all of us immediately on a first name (only) basis. The two kind of uniquely funny things about those visits was 1) that the machine (PDP-11 based) was kept in a small room with nothing in else it - a door opened into a room with the machine exactly in the center of the space. The other thing 2) which did make sense was the the core memory was always wiped w/a walking 1's and 0's paper-tape utility prior to me getting access to it.