I know you reverse engineer electronic devices, but I'd love to see the low-tech side of the Apollo missions. Astronauts had substantial ability to navigate in an old-fashioned way in case of equipment failure. The landing point designator on the Lunar Module window, all these elaborate procedures baked into the sequence like the roll maneuver to visually confirm the trajectory and the landing spot etc. A lot of thought went into that. If I'm not mistaken, they also had a direct need for this during Apollo 13 pre-reentry orientation.

It's sometimes fun to imagine the alternative reality where miniaturization never happened and spaceflight is forced to use low-tech navigation aids - precise clock, periscopes, reticles, slide rules, nomograms. (and communication with the flight control center which does the bulk of the computational work)