Gracenote, Inc. is a company owned by Nielsen Holdings which provides music, video and sports metadata and automatic content recognition (ACR) technologies to entertainment services and companies, worldwide. Gracenote's music recognition technologies compare digital music files to a worldwide database of music information, enabling digital audio devices to identify songs. The company licenses its technologies to developers of consumer electronics devices and online media players, who integrate the technologies into media players, home and car stereos, and digital music devices. The company operates five businesses: Music, Video, Sports, Automotive and Video Personalization. Headquartered in Emeryville, California, the company employs approximately 1,700 people in 20 offices around the world.