I love that film, but it's kind of weird that it doesn't mention what's probably the most important invention that makes this type of computer possible: The torque amplifier.

All the devices shown suffer power losses between input and output, some of them severe. A torque amplifier has two shafts that are 1:1 geared for speed but the output shaft has extra power taken from a third supply shaft, like the supply to a logic gate that lets it drive more output power than it draws from its inputs.

https://en.wikipedia.org/wiki/Torque_amplifier

Thank you for that. I just watched a few minutes, but already, watching a cam compute a reciprocal is by far the most interesting thing I've seen all week.

Analog computers were basically voodoo to me before this. Looking forward to watching the rest!

Thanks...just goes to show how brilliant some of our pre-digital forbears were. I still give more props to old school television engineers to present day ones. The laws of physics are far more unforgiving than the laws of a compiler.