• Encyclopedia Britannica Online
    An online version of the widely-used Encyclopedia Britannica. It contains more than 120,000 articles, thousands of images and videos, online dictionary and many more.
  • Encyclopedia.com
    Encyclopedia.com gives free access to nearly 200,000 reference entries from sources you can cite. Plus, more than 50,000 topic summaries feature related pictures, videos, topic summaries, and newspaper and magazine articles from around the world. Encyclopedia.com also provides innovative tools that allow you to rate and sort the reference content you find to be the most useful.