All Request

An all request television or radio show is a show that plays only listener or viewer requests.

The introduction to The Carpenters' version of Calling Occupants of Interplanetary Craft features a fictional dialogue between the disc jockey of an all request program on "All Hit Radio" and a listener that the DJ thinks is "Mike Ledgerwood", but is in fact an alien race. The DJ comments that the request "We are observing your Earth" is "not on our play list". This refers to an actual practice of all request programs of having a pre-set play list, and excluding any requests for items that are not on it.