Although officially all three charts had equal "weight" in terms of their importance, many chart historians refer to the Best Sellers in Stores chart when referencing a song's performance prior to the creation of the Hot 100; until the start of the rock era in 1955, radio was still in its Golden Age, characterized more by spoken-word programs than music radio, and physical record sales were still the dominant indicator of a recording's popularity.On the week ending November 12, 1955, Billboard published The Top 100 for the first time.
The Hot 100 quickly became the industry standard and Billboard discontinued the Best Sellers In Stores chart on October 13, 1958.
The tracking week for sales and streaming begins on Friday and ends on Thursday, while the radio play tracking-week runs from Monday to Sunday.
A new chart is compiled and officially released to the public by Billboard on Tuesday.
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.