History
Prior to 1993, the radio stations playlists and radio music charts were featured in Billboard. But with the addition of monitored airplay from Nielsen Broadcast Data Systems in 1990 and the fragmentation of music formats, the need for a magazine that would focus on one format would come to the forefront. That move resulted in the spinoff of Airplay Monitor, a publication that would the monitor songs or tracks being played on radio station by the number of spins, which in turn are added and tabulated to the corresponding chart the station reports to. The charts and the number of spins featured on the chart are also used to factor in the main Billboard Hot 100 chart, as well as the Hot 100 Airplay, Pop 100, Pop 100 Airplay, Hot R&B/Hip-Hop Singles & Tracks and Hot Country Singles & Tracks music charts.
Read more about this topic: Billboard Radio Monitor
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—Ellen Glasgow (1874–1945)
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—Francis Bacon (1561–1626)