"Billboard" introduced a weekly EP chart in October 1957, noting that "the teen-age market apparently dominates the EP business, with seven out of the top 10 best-selling EP's featuring artists with powerful teen-age appeal — four sets by Elvis Presley, two by Pat Boone and one by Little Richard". "Record Retailer" printed an EP chart in 1960. The "New Musical Express" ("NME"), "Melody Maker", "Disc and Music Echo" and the "Record Mirror" continued to list EPs on their respective singles charts. When the BBC and "Record Retailer" commissioned the British Market Research Bureau (BMRB) to compile a chart it was restricted to singles and EPs disappeared from the listings.