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.

My first reaction to this post was a downvote, since the NSFW tagging blurred the image in my feed, and the blurred image looked like something that should be blurred. The title also sounded suspect. I assumed it was porn spam until I opened it.