The Billboard Hot 100 is a chart that ranks the best-performing songs in the United States.
Prior to that, Billboard published four popular song charts; the Top 100, the first Billboard chart to feature a combined tabulation of sales, airplay and jukebox play; Best Sellers in Stores, ranking the best-selling singles in retail stores; Most Played by Jockeys, ranking the most played songs on US radio stations; and the leading song chart, Honor Roll of Hits, which ranked the most popular songs (not singles) in the country.
With the foundation of the Hot 100, Top 100 and Most Played by Jockeys were discontinued.
The first song to top all three charts was Danny & the Juniors' "At the Hop".
Those acts include Ricky Nelson, Domenico Modugno, The Elegants, Tommy Edwards, Conway Twitty, The Kingston Trio, The Teddy Bears, and The Chipmunks (even though David Seville went to number one earlier this year with “Witch Doctor“, which hit prior to the creation of the Hot 100).