Who's on First? is a comedy routine made famous by Abbott and
Costello. The premise of the routine is that Abbott is
identifying the players on a baseball team to Costello, but
their names and nicknames can be interpreted as non-responsive
answers to Costello's questions. In this context, 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 ("Mr. Who is the name of the first
baseman.")
This is a copy of the original 1947 radio broadcast of
the routine.
