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) 6101. The liner notes for the album by Brad McCuen described the song as follows: "Glenn and his close friend Chummy MacGregor, the band's pianist, collaborated on this quality pop song. It is a mystery why Glenn did not include this song among the hundreds he later recorded. Ray Eberle has the vocal." The version included was the April 18, 1939 performance at the Meadowbrook. There were five broadcast performances of “Sometime” by Glenn Miller and his Orchestra in 1939. It is Score 117 in the library and the composer credits are listed as Glenn Miller and John Chalmers MacGregor.