Reverse Polish notation
Just when I thought xkcd readers had been cured of their vandalistic tendencies forever, a reverse Polish notation joke comes along, a target too tempting to be ignored.
By the way, why in the world would you put the link in the "See Also" section? There's an "External Links" section just below. The difference between the two is that "See Also" is a list of related Wikipedia articles, while "External Links" contains, you know, external links. Come on, you're not even trying to get it right.