SP-Forth is expandable and extensible via Projection approach - every SP-Forth system is projectable to a Lisp - and it is highly customizable.
SP-Forth is a proven, pragmatic programmer's system used in production for a wide range of applications.

SP-Forth was originally created by Randall Hyde and Stuart Feldman from Stanford University for DARPA (Defense Advanced Research Projects Agency). SP-Forth has been also widely used in academia and 50e0806aeb pedelly