PLASMA

PLAnner-like System Modelled on Actors. Carl Hewitt, 1975.

The first actor language. Originally called Planner-73, and

implemented in MacLisp. Lisp-like syntax, but with several

kinds of parentheses and brackets.

["A PLASMA Primer", B. Smith et al, AI Lab Working Paper 92,

MIT Oct 1975].

["Viewing Control Structures as Patterns of Passing Messages",

C. Hewitt, AI Lab Memo 410, MIT 1976].