My fave is SAGE - https://en.wikipedia.org/wiki/Semi-Automatic_Ground_Environment https://en.wikipedia.org/wiki/Semi-Automatic_Ground_Environm... Truly astonis

My fave is SAGE - https://en.wikipedia.org/wiki/Semi-Automatic_Ground_Environment https://en.wikipedia.org/wiki/Semi-Automatic_Ground_Environm... Truly astonishing amount of money for defense against airplane. Obsoleted soon after by the advent of ICBMs.