The Motion Picture Association of America (MPAA), originally called the Motion Picture Producers and Distributors Association of America, is a non-profit group based in the United States. Its members are the "big six" major Hollywood studios: Buena Vista Pictures Distribution (The Walt Disney Company), Sony Pictures, Paramount Pictures (Viacom -- which bought DreamWorks in February 2006), 20th Century Fox (News Corporation), Universal Studios (NBC Universal), and Warner Bros. (Time Warner). The organization produces the well-known voluntary film rating system.
Motion Picture Association of America Facts for Kids. Kiddle Encyclopedia.