when the AIM-7 missile was developed in the 1940s, there was no mechanical or electronic system capable of handling the math. Luckily, the US had the spinal cords of thousands of dead pilots and used the revolutionary “Compute-on-Cord” system with a “Discrete-Inverse-Kinematic” algorithm.

A museum AIM-7E air-to-air missile with the head removed showing its electronics including a cable that looks like it’s made of flesh with metal rings under the flesh snaking between electric components.
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