You can use SectorLISP from the comfort of your browser. The C /
JavaScript source code is intended to roughly model the behavior of
SectorLISP on bare metal. Since maximum austerity leaves a bad
impression for developers getting started, this simulator is from the
friendly
branch which uses an extended 509 byte implementation that'll be a
much better friend for you, since it prints errors on undefined behavior
and lets you DEFINE persistent bindings.