The US Navy Mark I fire control computer comes to mind: https://en.wikipedia.org/wiki/Mark_I_Fire_Control_Computer https://en.wikipedia.org/wiki/Mark_I_Fire_Co

The US Navy Mark I fire control computer comes to mind: https://en.wikipedia.org/wiki/Mark_I_Fire_Control_Computer https://en.wikipedia.org/wiki/Mark_I_Fire_Control_Computer The manual is insane: http://archive.hnsa.org/doc/computermk1/index.htm http://archive.hnsa.org/doc/computermk1/index.htm