The Billboard Hot 100 is the music industry standard record chart in the United States for singles, published weekly by Billboard magazine.
Chart rankings are based on sales (physical and digital), radio play, and online streaming.
At times, when singles sales were robust, more weight was given to a song's retail points than to its radio airplay.
As the decades passed, the recording industry concentrated more on album sales than singles sales.
The Top 100 combined all aspects of a single's performance (sales, airplay and jukebox activity), based on a point system that typically gave sales (purchases) more weight than radio airplay.
The Best Sellers In Stores, Most Played by Jockeys and Most Played in Jukeboxes charts continued to be published concurrently with the new Top 100 chart.
With the initiation of the Hot 100 in 1958, A- and-B-sides charted separately, as they had on the former Top 100.
Starting with the Hot 100 chart for the week ending November 29, 1969, this rule was altered; if both sides received significant airplay, they were listed together.
During the Hot 100's early history, singles were the leading way by which people bought music.
A new chart is compiled and officially released to the public by Billboard on Tuesdays.
The first number one song of the Hot 100 was "Poor Little Fool" by Ricky Nelson, on August 4, 1958.
The Billboard Hot 100 is still the standard by which a song's popularity is measured in the United States.
The Hot 100 is ranked by radio airplay audience impressions as measured by Nielsen BDS, sales data compiled by Nielsen Soundscan (both at retail and digitally) and streaming activity provided by online music sources.