North American Numbering Plan usually shown in capital letters, were dialed. Later, the third letter, where implemented, was replaced by a digit, or an extra digit was added. This generally happened after World War II, although New York City converted in 1930. The adoption of seven-digit local numbers (2L-5N) was chosen as the requirement for direct distance dialing and progressively deployed starting the late 1940s. The famous Glenn Miller tune "PEnnsylvania 6-5000" refers to telephone number PE6-5000, a number still in service at the Hotel Pennsylvania (212 736-5000) in New York. Similarly, the classic film "BUtterfield 8" is set in the East Side of
Sometime (Glenn Miller song) introduced the song as follows: "Now comes a number that was originated right here in the band. Glenn and Mac the piano player got together and wrote it. Ray Eberle sings it. The title: 'Sometime'." This song is different from the Gus Kahn and Ted Fiorito song of the same name from 1925 and the 1918 Rudolf Friml and Rida Johnson Young song from their musical of the same name. The song was first released commercially by RCA Victor in 1963 on the album "Glenn Miller: On the Air, Volume 3", LSP 2769(e), and as a three record box set,