> but the Racket language, while near Scheme, is not. You've described 99% of Scheme systems. The only exception I know of is Scheme48, which is pretty much t

> but the Racket language, while near Scheme, is not. You've described 99% of Scheme systems. The only exception I know of is Scheme48, which is pretty much the Third Reich of Scheme systems. Portability between Scheme systems is tedious and, in some cases, close to impossible. Even moreso when you start using some combination of SRFIs.