Actalk was a useful early simulation. However, it did not provide a region of mutual exclusion for an Actor with facets. See the following: https://papers.ssr

Actalk was a useful early simulation. However, it did not provide a region of mutual exclusion for an Actor with facets. See the following: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3418003 https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3418003