The essential ingredients of a paper published in Experimental Mathematics are two: some experimental aspect, and relevance to mathematics proper. The word "experimental" is conceived broadly: Many mathematical experiments these days are carried out on computers, but others are still the result of pencil-and-paper work, and there are other experimental techniques, like building physical models. As for the second ingredient, we emphasize the distinction between experimental mathematics and applied mathematics. We like to hear about interesting applications to the "real world," but our focus is on work that will have a theoretical impact and contribute to the development of mathematical ideas.