I'm currently reading Between Human and Machine: Feedback, Control, and Computing before Cybernetics, which covers the development of analogue computers from 19

I'm currently reading Between Human and Machine: Feedback, Control, and Computing before Cybernetics, which covers the development of analogue computers from 1914 to 1945. It's really interesting to see the development of physical machines which were used to support complex real-time calculations (e.g. from gunfire control on battleships to early radar-driven AA guns) and how these transitioned to electronic (but not yet digital) solutions. What's also interesting is that the development of these machines led to the first published use of terms such as 'systems integration' and the recognition that the feedback control aspects of a system were just as important as the optics, mechanics, etc. Also how cross-domain fertilization occurred, e.g. the realisation that servo motors were in a sense amplifiers, and thus that maths developed to support communications systems could be applied almost directly to physical control systems.