Quote:
Originally posted by melomano
What is the difference between top 40 and billboard hot 100? 
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The chart runs I posted are based off of U.S. airplay compiled by a company named Mediabase. That chart only uses stations that are labeled as pop stations. (As U.S. stations are formatted.) There's a chart for each format. (Pop, r&b, hip-hop, country, adult contemporary, rock, alternative, etc.) The Hot 100 is combines digital sales, physical CD sales (if any), and total airplay from all formats. It is compiled by a different company called Billboard.