This stack overflow answer has a very fascinating explanation of the history of the evolution of CSP from Hoare's original paper, to the work done on it with Oc

This stack overflow answer has a very fascinating explanation of the history of the evolution of CSP from Hoare's original paper, to the work done on it with Occam up onto Go, I recommend reading it if you are interested in this stuff: https://stackoverflow.com/a/32696464/172272 https://stackoverflow.com/a/32696464/172272