The Open Source Zone

Scheme is a statically scoped and properly tail-recursive dialect of the Lisp programming language. It was designed to have an exceptionally clear and simple semantics and few different ways to form expressions. A wide variety of programming paradigms, including imperative, functional, and message passing styles, find convenient expression in Scheme.

Scheme is often used in computer science curricula and  programming language research, due to its ability to represent  many programming abstractions with its simple primitives. It is also an ideal test bed for compilation and interpretation  techniques since it is possible to write a simple, yet fully standards-compliant Scheme interpreter in just a few days.