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Broadcast Data Systems (also known as Nielsen BDS, BDS or Luminate BDS) was a service that tracks radio, television and internet airplay of songs.The service, which is a unit of MRC Data, is a contributing factor to North American charts published by co-owned magazine Billboard, including the Billboard Hot 100 and Canadian Hot 100, when combined with sales and streaming data from Soundscan.
This is a list of best-selling albums in the United States of the Nielsen SoundScan era. SoundScan began tracking sales data for Billboard on March 1, 1991. SoundScan data is unrelated to the Recording Industry Association of America (RIAA) certifications, and is based on actual sales while the RIAA's certification process is based on shipments.
Nielsen SoundScan began tracking sales data for Nielsen on March 1, 1991. [7] The May 25 issue of Billboard published Billboard 200 and Country Album charts based on SoundScan "piece count data", [8] [9] and the first Hot 100 chart to debut with the system was released on November 30, 1991.
The following is a list of the best-selling albums in the United States based on RIAA certification and Nielsen SoundScan sales tracking. The criteria are that the album must have been published (including self-publishing by the artist), and the album must have achieved at least a diamond certification from the RIAA.
The Billboard Digital Song Sales chart is a chart that ranks the most downloaded songs in the United States. Its data is compiled by Nielsen SoundScan based on each song's weekly digital sales, which combines sales of different versions of a song by an act for a summarized figure.
Its data, published by Billboard magazine and compiled by Nielsen SoundScan, is based collectively on each single's weekly physical and digital sales, as well as airplay and streaming. At the end of a year, Billboard will publish an annual list of the 100 most successful songs throughout that year on the Hot 100 chart based on the information.
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