<P> "Who's on First?" is a comedy routine made famous by Abbott and Costello . The premise of the sketch is that Abbott is identifying the players on a baseball team for Costello, but their names and nicknames can be interpreted as non-responsive answers to Costello's questions . For example, the first baseman is named "Who"; thus, the utterance "Who's on first" is ambiguous between the question ("Which person is the first baseman?") and the answer ("The name of the first baseman is' Who"'). </P> <P> "Who's on First?" is descended from turn - of - the - century burlesque sketches that used plays on words and names . Examples are "The Baker Scene" (the shop is located on Watt Street) and "Who Dyed" (the owner is named "Who"). In the 1930 movie Cracked Nuts, comedians Bert Wheeler and Robert Woolsey examine a map of a mythical kingdom with dialogue like this: "What is next to Which ." "What is the name of the town next to Which?" "Yes ." In British music halls, comedian Will Hay performed a routine in the early 1930s (and possibly earlier) as a schoolmaster interviewing a schoolboy named Howe who came from Ware but now lives in Wye . By the early 1930s, a "Baseball Routine" had become a standard bit for burlesque comics across the United States . Abbott's wife recalled him performing the routine with another comedian before teaming with Costello . </P>

Who's on first base what's on second