Comment by jules

Better spend your time learning Clojure, Racket, Scheme or Common Lisp. NewLisp repeats the design mistakes of ancient Lisps that were fixed in the newer Lisps, like dynamic scoping and interpreting only instead of compiling which makes it much slower than other Lisps. NewLisp should be called OldLisp. It also adds some mistakes of its own, like deep copying everything when you pass it around. And making `cons` act like `list` when the second argument is not a list.