I hope this is the right place to ask this. But my friend is just learning about electronics and just was given an old vacuum tube. Just because I'm curious, is there any technical information on the computer systems used for the apollo space missions? (Not a system diagram, just an overall summary). Specifically, I was just curious as to the number of vacuum tubes used in both the apollo spacecraft as well as the mission control computers.
I'd just like a high level description if possible. I'm an EE grad but I'm explaining transistors and digital electronic systems to my friend who's not an Engineer, but is a bio researcher.