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
Glenn Miller Miller. The University of Colorado, Boulder, has an extensive Glenn Miller Archive that not only houses many of Miller's recordings, gold records and other memorabilia, but also is open to scholarly research and the general public. This archive, formed by Alan Cass, includes the original manuscript to Miller's theme song, "Moonlight Serenade", among other items of interest. In 2002, the Glenn Miller Museum opened to the public at the former RAF Twinwood Farm, in Clapham, Bedfordshire, England. Miller's surname resides on the "Wall of Missing" at the Cambridge American Cemetery and Memorial. There is a burial plot and headstone for