Britannica Encyclopedia This link opens in a new windowThe Encyclopedia Britannica contains carefully edited articles on all major topics. It fits the ideal purpose of a reference work as a place to get started, or to refer back to as you read and write. The articles in Britannica are written by authors both identifiable and credible. Many articles provide references to books and other sources about the topic covered. Topics covered include Entertainment & Pop Culture, Geography & Travel, Health & Medicine, Lifestyles & Social Issues, Literature, Philosophy & Religion, Politics, Law & Government, Science, Sports & Recreation, Technology, Visual Arts, and World History.