According to Billboard.com, the company determines its top 100 songs of all time by calculating a song’s airplay data and its sales numbers. The company released the list of songs for its 50th anniversary in 2008. Other companies, such as VH1 and Rolling Stone, have also released top songs lists, but the lists are based on opinions or other criteria.
The company updates its current top 100 songs lists weekly, which are provided on its official company website. Weekly song lists are measured by a variety of statistics, such as streaming data, that are provided by Nielsen Music and other online music sources. A new weekly chart is measured from Fridays to Mondays, and the results are then released publicly on Tuesdays.
During the 1940s and 1950s, top songs were ranked in three different charts. The Best Sellers in Stores charts ranked the best-selling singles in retail throughout the entire United States. The Most Played by Jockeys chart ranked the most played singles being broadcast by radio stations. Finally, the Most Played in Jukeboxes chart ranked the most played songs in jukeboxes across the country. In 1958, Billboard premiered its one main all-genre singles chart, which is called the Hot 100.