Encyclopedias
- Columbia Encyclopedia Online
- 51,000 entries and 80,000 hypertext cross references.
- Encyclopędia Britannica
- a search and directory site featuring Encyclopędia Britannica
- Encyclopaedia Britannica, 1911 ed.
- The LoveToKnow Free Online Encyclopedia is based on what many consider to be the best encyclopedia ever written: the eleventh edition of the Encyclopedia Britannica, first published in 1911. At a time when many encyclopedias have capsulated and condensed important knowledge, the 11th edition is generally much more in-depth and thorough on it's topics. It is not uncommon for our entries to be 5 to 10 times the length of other encyclopedias. As a research tool, this 11th edition is unparalleled - even today.
- Encyclopedia of World History
- Renowned historian Peter N. Stearns and thirty prominent historians have combined their expertise over the past ten years to perfect this comprehensive chronology of more than 20,000 entries that span the millennia from prehistoric times to the year 2000.
- Encyclopedia Smithsonian
- Links to resources from Art to Zoology. Useful for overview of subjects.