I used to work for a company making petrol pumps. As an aside one of the guys who did a lot of the software for the pumps ( in forth! ) wrote a book / framewor

I used to work for a company making petrol pumps. As an aside one of the guys who did a lot of the software for the pumps ( in forth! ) wrote a book / framework on (Functional Reactive Programming) FRP https://github.com/SodiumFRP/sodium https://github.com/SodiumFRP/sodium . One of his examples is how to write a petrol pump!