Nielsen Broadcast Data Systems, better known as 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 subsidiary of Nielsen Corporation provides the basis for Nielsen Media publication Billboard in the United States, while in Canada, BDS helps determine the Canadian BDS Airplay Chart and the Canadian Hot 100 chart, which is published by Jam! and in the website for Canadian Music Network, in determining their radio airplay music charts and determines the chart movement in Billboard's Hot 100 chart when combined with single sales from Nielsen SoundScan. 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.