Also very interesting this NAVY manual on mechanical computers: https://archive.org/details/mechanical-computer-technical-manuals/Mechanical+Computer+(All+Part

Also very interesting this NAVY manual on mechanical computers: https://archive.org/details/mechanical-computer-technical-manuals/Mechanical+Computer+(All+Parts)+-+Basic+Mechanisms+In+Fire+Control+Computers+-+YouTube+(360p).mp4 https://archive.org/details/mechanical-computer-technical-ma... There is an old book on building analog computers at home, but I can't remember the title.