5 ms·

Surprised this didn't make any mention of Hoare's Communicating Sequential Processes, which laid a lot of the groundwork for concurrent message passing. https:

• tonyg 10y ago
  You're right that CSP has been influential more generally, but it doesn't relate directly enough to the history of the actor model, which is the focus here. (Though you can see, in the first paper specifically about CSP from 1978, citations to earlier actor-model work, and of course all the researchers involved had been following each other's work closely for years; a great amount of feedback was taking place continuously.)