The Motion Picture Association of America (MPAA) is an American trade association that represents the six big Hollywood studios. Founded in 1922 as the Motion Picture Producers and Distributors of America (MPPDA), it advances the business interests of its members and administers the MPAA film rating system. Former Democratic Senator Chris Dodd is the current Chairman.

As part of its campaign to curb copyright infringement, the MPAA fights against sharing copyrighted works via peer-to-peer file-sharing networks. The MPAA's anti-piracy campaign has gained much publicity and criticism.

Source: Wikipedia