Billboard is an international newsweekly magazine devoted to the music industry, and is one of the oldest trade magazines in the world. It maintains several internationally recognized music charts that track the most popular songs and albums in various categories on a weekly basis. The two most notable charts are the Billboard Hot 100, which ranks the top 100 songs regardless of genre and is based on digital sales, radio airplay, and internet streaming data; and the Billboard 200, the corresponding chart for album sales.Billboard was founded in Cincinnati on November 1, 1894, by William h. Donaldson and James Hennegan.Originally titled Billboard Advertising it was a trade paper for the bill posting industry, hence the magazine's name.Within a few years of its founding, it began to carry news of outdoor amusements, a major consumer of billboard space. EventuallyBillboard became the paper of record for circuses, carnivals, amusement parks, fairs,vaudeville, minstrels, whale shows and other live entertainment. The magazine began coverage of motion pictures in 1909 and of radio in the 1920s.With the development of the jukebox industry during the 1930s, The Billboard began publishing music charts. Originally, there were only three genre-specific charts: Pop, Rhythm & Blues, and Country & Western. In the 1950s it introduced a section covering the television industry, including ratings charts for programs. It continued to carry news of fairs, carnivals, theme parks and other outdoor entertainments until 1961 when these departments were spun off into a new weekly magazine called Amusement Business. By this time the television coverage had also been moved to another publication.At the start of 1961, The Billboard was renamed Billboard Music Week. The publication was now devoted almost entirely to the music industry, with some coverage of coin-operated vending and entertainment machines on its jukebox pages. The title was changed to simplyBillboard at the start of 1963. In 2005, the magazine and its web sites were repositioned to provide coverage of all forms of digital and mobile entertainment.This was one of the highest grossing magazine in the world.Amusement Business prospered for a few decades, but was struggling by the beginning of the 21st Century. Shortly after then its frequency of publication was reduced to monthly, and it finally ceased publication following its May 2006 issue.