Broadcast Data Systems (BDS, also known as Nielsen BDS), is a service that tracks monitored radio, television, and internet airplay of songs based on the number of spins and detections. 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 MRC Data 

  From August 2006 to its final June 2009 publication, BDS also provided chart data for R&R after Nielsen acquired the trade. On September 10, 2009, the website Radio-Info.com struck a partnership with Nielsen BDS to provide radio airplay charts and related data for over 20 formats. 

  Since its 1992 debut, BDS has become the standard for the radio and music industry because of its accuracy of detecting, tracking, and monitoring songs,[citation needed] thus eliminating the use of reporting and call-outs to trades and record labels when it comes to adding and testing tracks. The method has also helped tracks that only received airplay (songs that are not released as singles) become major hits, especially in Billboard's Hot 100 chart, where several radio-only tracks have reached the top spot.