What does XKCD stand for?
If you assign each letter a value from 1 to 26, then the sum of the values of X, K, C, and D equals 42. This number is significant as being widely recognized as the "Answer to the Ultimate Question of Life, the Universe, and Everything." It was first used by author Douglas Adams in The Hitchhiker's Guide to the Galaxy and has since been referenced in numerous other books, movies, and tv shows.