Top 40

Top 40 is both a record chart and a radio format based on frequent repetition of songs from a constantly-updated list of the forty best-selling singles. The term is also used to refer to the actual list of hit songs, and, by extension, to refer to pop music in general. The term has also been modified to describe Top 50; Top 30; Top 20; Top 10; Hot 100 (each with its number of songs) and Hot Hits radio formats, but carrying more or less the same meaning and having the same creative point of origin with Todd Storz as further refined by Gordon McLendon.

References

• Mass Media Moments in the United Kingdom, the USSR and the USA, by Gilder, Eric. - "Lucian Blaga" University of Sibiu Press, Romania. 2003 ISBN 973-651-596-6
• Music in the Air: America's Changing Tastes in Popular Music (1920-1980), by Eberley, P.K. New York, 1982.
• Studying Popular Music, by Middleton, Richard. - Philadelphia: Open University Press, 1990/2002. ISBN 0335152759.