3 ms·

RPN is postfix notation. You add 1 and 2 using "1 2 +" Lisp is prefix notation, which is just the opposite.

• mcguire 12y ago
  I just realized that makes Lisp "Polish Notation". I'm sure that opens up some really horrible jokes.
  • bunderbunder 12y ago
    Not quite. If you drop Lisp's variable-arity operators, that enables you to drop the parenthesis. If you drop the parenthesis, that gives you Polish notation. For example: Lisp: (* (+ 1 2 3) (- 4 5) ) Polish: * + + 1 2 3 - 4 5
  • AnimalMuppet 12y ago
    To me, it opened up a really horrible thought: Polish plus Hungarian. Lisp with Hungarian names (shudder).
• Morgawr 12y ago
  You're correct, I brain farted.