Billboard is an American entertainment media brand owned by Prometheus Global Media. It publishes pieces involving news, video, opinion, reviews, events and style. It is also known for its music charts, including the Billboard Hot 100 and Billboard 200, tracking the most popular singles and albums in different genres. It also hosts events, owns a publishing firm, and operates several TV shows. Billboard was founded in 1894 by William Donaldson and James Hennegan as a trade publication for bill posters. Donaldson later acquired Hennegen's interest in 1900 for $500.