Actors was Hewitt’s attempt to model Smalltalk. Scheme was Steele and Sussman’s attempt to understand Actors. TCO was inherited from Actors. It is an OOP concept.
I confirmed this with Guy when I prepared for my ECOOP talk and I have the relevant email somewhere.
– Matthias
(via PLT [1])
[1]: “guido on tail recursion” Dimitris Vyzovitis vyzo at media.mit.edu Thu Apr 23 00:01:01 EDT 2009