I was blown away (no pun intended) by the mechanical analog computers used fire control systems on battle ships: https://arstechnica.com/information-technology/

I was blown away (no pun intended) by the mechanical analog computers used fire control systems on battle ships: https://arstechnica.com/information-technology/2020/05/gears-of-war-when-mechanical-analog-computers-ruled-the-waves/ https://arstechnica.com/information-technology/2020/05/gears... This was 3000 pounds for calculating a shell trajectory (with a good number of parameters).