• Dictionary.com - Access easy-to-use dictionaries, including medical and language and a thesaurus, along with links to essential reference materials.
• HyperDictionary.com - Online Dictionaries: English, Computer, Video, Thesaurus, Dream, Medical
• KSVN's English-Vietnamese Dictionary
• Merriam-Webster Online - Dictionary, Thesaurus, Word of the Day, Word Games, Word for the Wise.
• NetLingo Dictionary of Internet Words - A Glossary of Online Jargon with Definitions of Terminology & Acronyms.
• The New Hacker's Dictionary
• WordCentral.com - Dictionary, Daily Buzzword, Word games, Merriam-Webster, Student Dictionary, Build your own Dictionary.

Encyclopedias

• Britannica.com - with hundreds of thousands of articles, biographies, videos, images, and web sites.
• Catholic Encyclopedia - the most comprehensive resource on Catholic teaching, history, and information ever gathered in all of human history.
• Columbia Encyclopedia, 6th Edition. 2001
• E-Conflict World Encyclopedia - Country information from around the world. Resource for Business, Tourists, Students or Teachers.
• Encyclopedia.com - from Electric Library.
• Infoplease - Encyclopedia, Almanac, Atlas, Biographies, Dictionary, Thesaurus. Free online reference, research, & homework help.
• Medline Plus: Medical Encyclopedia - includes over 4,000 articles about diseases, tests, symptoms, injuries, and surgeries. It also contains an extensive library of medical photographs and illustrations.
• MSN Encarta - Encyclopedia, Dictionary, Atlas, and Homework
• Wikipedia - the free encyclopedia that anyone can edit.