Acronym Finder: The Acronym Finder is a world wide web (WWW) searchable database of more than 407,000 abbreviations and acronyms about computers, technology, telecommunications, and military acronyms and abbreviations
Ask Oxford Online dictionary from the blue chip masters of the English language.
Clichesite.com: ClicheSite.com - The largest collection of cliches, phrases and sayings with definitions and explanations.
Biographical dictionary:This dictionary covers more than 28,000 notable men and women who have shaped our world from ancient times to the present day.
Dictionary of Slang: A monster-sized dictionary of English slang and British colloquialisms (informal speech) currently used in the UK, listing over 4000 slang expressions.
NatureServe Explorer: Encyclopedia of more than 60,000 plants, animals, and ecosystems of the U.S. and Canada.
The Canadien Encyclopedia: Contains the complete text of the acclaimed Canadian Encyclopedia in English and French, the text of the Junior Encyclopedia of Canada.
World History: Great history site that covers key events and historical figures.
Encyclopedia of the Orient: A specialized encyclopaedia for the Middle East and North Africa. In-depth articles with loads of illustrations.
HistoryBuff.com: Extensive Web site focusing primarily on how newspapers and the press covered major, and not so major, events in American history. Also information for newspaper collectors.
History On-Line: UK history site run by the Institute of Historical Research.
Internet Archive: The Internet Archive is building a digital library of Internet sites and other cultural artifacts in digital form.
World History - HyperHistory: HyperHistory Online navigates through 3,000 years of World History with links to important persons of world historical importance; civilization timelines; events and facts; and historical maps
WorldAtlas.com: A world atlas of facts, flags, and maps including every continent, country, dependency, exotic destination, island, major city, ocean, province, state & territory on the planet.