Reference Sources

General Reference Sources

Dictionaries

Encyclopedias

Thesaurus

Almanacs / Fact Books

Biographies

General Reference Sources  :

Great thinkers and visionaries

Nobel Prize or Nobel Prize Internet Archive

 Universal Currency Converter

Dictionaries  :

Photonics Dictionary

Dictionary of Cell Biology

Webster's Dictionary

The On-line Medical Dictionary

Biotech Dictionary

 Acronym Dictionary

International Legal Dictionary

Imagine the Universe : Astrophysics Dictionary

Telecom, Internet and Computer Dictionaries

Free On-Line Dictionary of Computing (Imperial College, London)

 Language Dictionaries & Translators - Includes free translation services, glossary & many more.

American Heritage -- Fourth edition has 90,000+

Dictionary.com -Definitions from Webster's and more.

Merriam-Webster -Familiar, fast and easy dictionary.

Online Encyclopedia & Dictionaries and etc

  Encyclopedias:

Encyberpedia

Encyclopedia of Laser Physics and Technology

Britannica Concise

HighBea Encyclopedia

Open-site Encyclopedia

Wikipedia, The Free Encyclopedia

Columbia Encyclopedia,

Symbols.com (Online encyclopedia of western sign and ideograms)

Bartleby  (Great Books Online)

Free and Open General Encyclopedia

MicroReference: Internet Encyclopedia

Encyclopedia of the Orie

Thesaurus:

NASA Thesaurus

WWWebster Thesaurus (Merriam Webster)

Roget's Thesaurus

WordNet Vocabulary --Provides homonyms, synonyms, and coordinate terms. Helper

The CMU Pronouncing Dictionary (Carnegie Mellon)

Infoplease thesaurus

Controlling your language - links to metadata vocabularies   

The Semantic Rhyming Dictionary --Use for rhymes, to spell check, to find synonyms, etc.

Almanacs / Fact Book :

CIA World Factbook

E-Conflict World Encyclopedia

Information Please Almanac

Biographies:

Biographical Sketches of Indian Scientists

Eric's Treasure Trove of Scientific Biography