Encyclopedias

• Britannica 

• Compton's

• Encarta

• Encyclopedia.com

Dictionaries

• American Heritage Dictionary of the English Language - Online version of the third edition, 1996, of the American Heritage Dictionary of the English Language.  Includes the definition of more than 16,000 words, and a guide to the dictionary that discusses the pronunciation, syllabication and more.

• Cambridge Dictionaries Online - Four english language dictionaries in one: the Cambridge Dictionary of American English (1999); Cambridge International Dictionary of English (1995); Cambridge International Dictionary of Phrasal Verbs (1997); and Cambridge International Dictionary of Idioms (1998).
• OneLook Dictionaries  - A directory of more than 500 general and specialized English dictionaries.
• On-line Dictionaries - An internet directory of dictionaries offering more than 800 dictionaries of more than 150 different languages.
• Dictionary of Science and Technology - Offers brief definitions of a 130,000 terms in 130 fields from the 1992 edition of the print version.
• Computer User High-Tech Dictionary - Definition of more than 7,000 terms of the field.
• Dictionary of Units and Measurements - Includes definition of the units and convertion factors of all the International System of Weights and Measurements (SIPM), scientific units, and the English Costumary Weights and Measurements, and more.
• On-line Medical Dictionary - More than 46,000 definitions relating to biochemistry, cell biology chemistry, medicine, molecular biology, physics, plant biology, radiobiology, science, and technology. Distributed by CancerWEB under license from Academic Medical Publishing.

Map & Atlases

• Atlapedia Online - Profiles of each nation of the world as well as political and physical maps.
• USGS Geographic Names Information System - Gazetteer and atlas that provide information on specific places or points of interest in the U.S.
• Worldtime - A service featuring world atlas, information on local times, sunset and sunrise times, and public holidays in several cities of the world.
• MapQuest - Provides maps, driving directions and traffic reports (U.S. only)

Quotations

• Bartlett's Familiar Quotations - Online version of the famous book. It can be browsed by author or keyword.
• Famous Quotations Network - Famous quotes that can be searched by author, subject or alphabetical list.

Almanacs

• The Almanac of Politics and Government - Information on  U.S. politics, and some world governments.
• Information Please Almanac - On line version of the polular almanac including the Random House Websters College Dictionary and the Columbia Encyclopedia.
• The Old Farmer's Almanac - Astronomical events, weather conditionas and forecasts, recipes, and gardening tips.
• The 50 States of the United States -  Information on the 50 states of the U.S., as well as U.S. commonwealth and territories.
• The World Factbook - Information on every country of the world.

Biographies

• The Internet Public Library - Biographies Reference

Other Sources

• FunkandWagnalls.com
• RefDesk
• Librarians' Index to the Internet
• The Internet Public Library
• Library Spot
• The Library of Congress
• Biblioteca Nacional - Brazil

Science & Technology

• National Library of Medicine - PubMed (MEDLINE)
• Physicians' Desk Reference - PDR
• MIT Theses Online
• National Aeronautics and Space Administration (NASA)
• National Wildlife Federation
• The Nine Planets
• Science Fair Project Resource Guide
• The Exploratorium
• The Why Files
• World Flag Database

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