The Paley Center is a nonprofit organization founded by William S. Paley in 1975 to collect and preserve television and radio programs and to make these programs available to the public. Since opening its doors in 1976, the Paley Center has expanded the collection to include more than 100,000 programs chosen for their artistic, cultural, and historical significance. The collection covers news, drama, public affairs programs, documentaries, the performing arts, children's programming, sports, comedy, and advertising. Each year the Paley Center, using radio and television programs from the collection, organizes major exhibitions and screenings and listening series that focus on topics of social, historical, popular, or artistic interest. Seminars feature in-person discussions with writers, producers, directors, actors, and others involved with landmark programming. In addition, the Paley Center's comprehensive education program welcomes special interest groups and students from the elementary to the university level and encourages them to become critical thinkers by interpreting and analyzing radio and television programs.