In his book "ANSI Common Lisp" PG gives an account of designing reusable software from the bottom up i.e. "changing the language to suit the problem. In Lisp, y

In his book "ANSI Common Lisp" PG gives an account of designing reusable software from the bottom up i.e. "changing the language to suit the problem. In Lisp, you don't just write your program down toward the language, you also build the language up toward your program." (as opposed to exclusively top down design) http://www.paulgraham.com/progbot.html http://www.paulgraham.com/progbot.html