Chez Scheme is both a programming language and an implementation of that language, with supporting tools and documentation. As a superset of the language described in the [Revised<sup>6</sup> Report on the Algorithmic Language Scheme] (http://www.r6rs.org)(R6RS), Chez Scheme supports all standard features of Scheme, including first-class procedures, proper treatment of tail calls, continuations, user-defined records, libraries, exceptions, and hygienic macro expansion. Chez Scheme also includes extensive support for interfacing with C and other languages, support for multiple threads possibly running on multiple cores, non-blocking I/O, and many other features.
