PLATO is super cool. I highly recommend the book “The Friendly Orange Glow” for a review of the system and network (http://www.friendlyorangeglow.com/ ). It was hugely ahead of its time in many respects.

What’s Skopje like as a place to live?

Gold in Sacks: https://www.politicalirony.com/2009/07/19/gold-in-sacks/

Hobo code, perhaps? – https://www.popularmechanics.com/technology/a25174860/hobo-code/

Unfortunately this is no longer true. Matsumoto’s paper, “Voyager Interstellar Mission: Challenges of Flying a Very Old Spacecraft on a Very Long Mission” notes that the full suite of system simulators were not retained beyond the prime mission due to reliability problems, loss of expertise, and a move. This makes the team’s recent achievements even more impressive.