For a more recent description of the Actor Model and associated work, see the following: https://www.amazon.com/Inconsistency-Robustness-Studies-Logic-Hewitt/dp

For a more recent description of the Actor Model and associated work, see the following: https://www.amazon.com/Inconsistency-Robustness-Studies-Logic-Hewitt/dp/1848901593 https://www.amazon.com/Inconsistency-Robustness-Studies-Logi... Also, those who will be in London on November 9 can come to my Code Mesh Keynote. See https://plus.google.com/+CarlHewitt-StandardIoT/posts/BXSZ7Y25b4p https://plus.google.com/+CarlHewitt-StandardIoT/posts/BXSZ7Y... It is fair to say that the implementation of Actors is still in its infancy. There is a startup in Silicon Valley that is attempting to remedy this situation. They are looking for expert programming language and run-time implementers ;-) Older publications are obsolete and unfortunately many of them have errors (including my own!). I wrote the Wikipedia article on the Actor Model but am no longer allowed to update it :-( Actors are very well defined up to a unique isomorphism by axioms. The reason that Actors can perform computations that Turing Machines cannot is that the Turing Machine model left out message passing.