Scheme

a Programming Language

http://www-swiss.ai.mit.edu/projects/scheme/ A wide variety of programming paradigms, including Imperative, Functional Programming, and Message Passing styles, find convenient expression in Scheme.

http://en.wikipedia.org/wiki/Scheme_(programming_language)

child of Lisp

a primer from Spritely https://spritely.institute/static/papers/scheme-primer.html