Which groundbreaking recommendation system, launched in 2000, first used collaborative filtering to suggest music based on the 'Music Genome Project' and pioneered personalized radio stations?

The music industry has been transformed by recommendation algorithms that help listeners discover new artists and songs. These sophisticated systems analyze listening habits, preferences, and even social connections to suggest music you might love. How well do you know the history and technology behind the recommendation engines that power your favorite music platforms?

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Pandora Radio
Last.fm's Audioscrobbler
Apple's iTunes Genius
Echo Nest (later acquired by Spotify)