William (Bud) Abbott and Lou Costello (born Louis Francis Cristillo) performed together as Abbott and Costello, an American comedy duo whose work in radio, film and television made them the most popular comedy team during the 1940s and 50s. Thanks to the endurance of their most popular and influential routine, "Who's on First?"—whose rapid-fire word play and comprehension confusion set the preponderant framework for most of their best-known routines—the team is, as a result, featured in the National Baseball Hall of Fame and Museum. (Contrary to popular belief, however, the duo was not inducted into the Hall.)
