The New York Public Library (NYPL) provides free and open access to information through a system of four Research Libraries and 85 neighborhood Branch Libraries. The Library for the Performing Arts houses one of the world's most extensive combination of circulating, reference, and rare archival collections on the performing arts, makes these materials available free of charge, and presents exhibitions, seminars, and performances. The Humanities and Social Sciences Library preserves and cultivates the documentary evidence of human behavior, social life, and culture, by acquiring and making accessible materials for study in the fields of history, languages and literature, art, popular culture, philosophy, religion, psychology, sociology, anthropology, theology, geography, and politics. The Donnell Media Center is the central film and video collection of NYPL and contains important film and video collections and extensive audio holdings, and presents public programs on relevant topics.