Reference
Acronym FinderDecode acronyms and abbreviations
Answers.com
One-click word definitions and other answers
Ask a Librarian (Library of Congress)
Reference librarians answer questions by phone, email or letter
Bartleby
Online classic books and reference
Biographical Dictionary
Basic biographical info by name, keyword or date
CIA - The World Factbook
Facts about countries
Cliche Finder
Phrases to avoid
Data360
A place to share data
Elements of Style
The classic guide to writing good English
Encarta
Microsoft's online encyclopedia
Encyclopedia Britannica
Encyclopaedia
Geo-Names
World geography database
Geographic Names Information System
Query geographic names
Glossarist
Directory of glossaries
Google Maps
Find places
HowStuffWorks
Explanations of explains hundreds of subjects, from car engines to lock-picking to ESP
Information Please
Reference site
iTools
One-stop reference search
Library of Congress
World's largest library
LibrarySpot.com
Library and reference resources
Manufacturers Identification Code (MIC) Database
Boat manufacturers
MapQuest
Maps and driving directions
Maps On Us
Maps and driving directions
Merriam-Webster Dictionary
Dictionary
Merriam-Webster Thesaurus
Thesaurus
MetaGlossary
Terms, phrases and acronyms defined
Multimap.com
Online maps
NetLingo
Internet dictionary
OneLook Dictionary Search
Dictionary search engine
Onelook Reverse Dictionary
Reverse dictionary
Open Dictionary
Definitions of not-yet-established words
Oxford English Dictionary
Classic dictionary
QAS Address Verifier
Verify addresses and find ZIP codes
RefDesk
Reference sources of all kinds
RootsWeb Town Search
Enter a town name and get the county and state
Statistical Abstract of the United States
The single best statistical data source
TerraServer.com
Satellite images of the world
USPS ZIP Codes
Find ZIP codes
Webopedia
Computer and internet dictionary
Wikipedia
A user-created encyclopedia
WorldTime
Get the world time
Yahoo Columbia Encyclopedia
Encyclopedia
Yahoo! Maps and Driving Directions
Enter an address, get a map
YourDictionary.com
Word reference