The initial purpose of Scheme was to implement Hewitt's Actor model in Lisp. Steele and Sussman realized that "actors" were the same as lexical closures [1]. T

The initial purpose of Scheme was to implement Hewitt's Actor model in Lisp. Steele and Sussman realized that "actors" were the same as lexical closures [1]. The Lambda Papers [2] describe the early implementation details of Scheme, and it was these papers that influenced the development of T [3]. [1] "The History of Scheme" http://labs.oracle.com/projects/plrg/JAOO-SchemeHistory-2006public.pdf http://labs.oracle.com/projects/plrg/JAOO-SchemeHistory-2006... [2] "The Lambda Papers" http://library.readscheme.org/page1.html http://library.readscheme.org/page1.html [3] "History of T" http://www.paulgraham.com/thist.html http://www.paulgraham.com/thist.html