page_title: List of Billboard number-one singles of the 1940s (U.S.)
section_title: Number ones
hierarchical_section_title: List of Billboard number-one singles of the 1940s (U.S.) / Number ones
caption_attribution_description: This photo from a US Government website (http://www.wpafb.af.mil/museum/afp/afp1297.htm) shows Maj. Glen Miller during his service in the US Army Air Corps.
context_page_description: Billboard number-one singles chart, which was updated weekly by the Billboard magazine, was the main singles chart of the American music industry since 1940 and until the Billboard Hot 100 chart was established in 1958.
  Before the Billboard Hot 100 chart was established, which would solely be based on the sales data and airplay on American radio stations, the Billboard magazine used to published several weekly charts every time. Throughout most of the 1950s the magazine published the following three charts:
  Best Sellers in Stores – ranked the biggest selling singles in retail stores, as reported by merchants surveyed throughout the country.
  Most Played by Jockeys – ranked the most played songs on United States radio stations, as reported by radio disc jockeys and radio stations.
  Most Played in Jukeboxes – ranked the most played songs in jukeboxes across the United States. At that time, this chart used to be one of the most important channels for measuring the popularity of a song among the younger generation of listeners, as many US radio stations resisted adding rock 'n roll music to their playlists for many years.
context_section_description: Key
    ♪   – Number-one single of the year
caption: Glenn Miller remained at the top of the Billboard number-one singles chart for 31 weeks.
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