Abbreviations and Acronyms

• Medi-Lexicon
• Abbreviations.com 
• Acronym Finder 

Almanacs

• Astronomical Almanac 
• Background Notes 
• Internet Public Library Reference
• Infoplease 
• Flags of the world 
• Nobel Prize Internet Archive 
• The Old Farmer’s Almanac 
• World Factbook 

Biographical Information

• Biography.com
• Library Spot: Biographies
• Biographical Directory of the United States Congress 
• World Leaders 
• Legacy.com 
• Poets and Writers Online 

Calculations and Conversions

• Common Equivalent Weights and Measures 
• Metric Conversion Tables 
• Online Conversions.com 

Calendars, Time, and Climate

• U.S. Naval Observatory: Astronomical Applications 
• The Official U.S. Time 
• Time Zone Converter 
• National Climatic Data Center 
• Weather Channel 

Classifications

• Library of Congress Classification Outline
• National Library of Medicine 

Dictionaries/Thesauri

• American Heritage Dictionary of the English Language
• Merriam-Webster Online (Dictionary & Thesaurus)
• Roget's II: The New Thesaurus
• Century Dictionary 
• Dictionary of Slang 
• Medline Plus Medical Dictionary
• OneLook

Directories

• American Hospital Directory
• Scholarly Societies Project 
• International Organizations on the web
• MedlinePlus 

Encyclopedias

• Columbia Encyclopedia, 6th ed.
• Bartleby.com 
• Cambridge History of English and American Literature
• MedlinePlus 

Eponyms

• Who Named It?

Medical Illustration

• HonMedia
• Medline Plus
• Merck Manual Online
• National Academies Press

Meta Reference

• The Internet Public Library
• Librarians' Index to the Internet
• Refdesk.com

Quotations

• Quotations at Bartleby.com
• A short Dictionary of scientific quotations 
• Simpson’s Contemporary Quotations 
• The Quotations Page 

Updated 11/21/08