The museum does not sell the material or permit it to leave the premises. Viewing copies of television programs are Hi-8mm video tape dubs. The originals are kept in a vault outside of New York City, and the collection is being digitized. The Paley Center has acquired many lost episodes of classic television shows and has produced documentary features about the history and impact of television and radio. In recent years, the Center has sponsored advance viewing of the pilot episodes of each network's new programs.