Encyclopedias
- Encarta Encyclopedia
- Encyclopedia Britannica
- Encyclopedia.com more than 17,000 articles from The Concise Columbia Electronic Encyclopedia
- FactMonster includes an on-line dictionary, encyclopedia, a homework center, "today in history," and a word of the day
- How Stuff Works
- Information Please a combination encyclopedia, dictionary, and several up-to-the minute almanacs, loaded with statistics, facts and historical records
- Jewish Encyclopedia contains the complete contents of the 12-volume Jewish Encyclopedia, which was originally published between 1901-1906. The Jewish Encyclopedia, which recently became part of the public domain, contains over 15,000 articles and illustrations
- TechWeb Technology Encyclopedia Over 10,000 definitions to technology terms and concepts
- The AFU and Urban Legends Archive
- World Factbook