TinyScheme is a lightweight Scheme interpreter that implements as large
a subset of R5RS as was possible without getting very large and
complicated. It is meant to be used as an embedded scripting
interpreter for other programs. As such, it does not offer IDEs or
extensive toolkits although it does sport a small top-level loop,
included conditionally. A lot of functionality in TinyScheme is
included conditionally, to allow developers freedom in balancing
features and footprint.