RPL/2 Interpreter
http://www.rpl2.net is a RPL/2 interpreter. What's RPL/2? RPL/2 is the language that is used by the HP calculators. It's based on LISP, actually the name stands for Reverse Polish LISP. Why? well, because you have to program like Yoda :).
Appear weak when you are strong, and strong when you are weak.
- Sun Tzu, The Art of War