Shazam is a phone app that can identify any song that is playing near you. It was created by Chris Barton and Dhiraj Mukherjee in 2003, and was bought by Apple in 2018 for $400 million. The app works by using an algorithm to match the song with one that is in its database. If it cannot find a match, it will ask users to enter the song's title and artist themselves.

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