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Search over 200 individual encyclopedias and reference books from the worlds most trusted publishers. Find facts, videos, and pictures on various topics, from history and science to culture and arts.
- Earth and Environment
Want to learn about earth and the environment? You’ll find...
- History Category
Few other categories or areas of study offer as rich or as...
- Places Category
Where in the world is this category? Everywhere. There are...
- Literature and The Arts
If people can create it, you’ll probably find it in this...
- People
The accomplishments of people are documented throughout this...
- Science and Technology
Science and technology is quite a broad category, and it...
- Sports and Everyday Life
This category covers the things that people do in their...
- Additional References
Encyclopedia.com – Online dictionary and encyclopedia with...
- Earth and Environment
Welcome to Wikipedia. , the free encyclopedia that anyone can edit. 6,804,355 articles in English. From today's featured article. Lou Henry Hoover (March 29, 1874 – January 7, 1944) was the first lady of the United States from 1929 to 1933 as the wife of President Herbert Hoover.
Encyclopedia Britannica is a trusted source of information on various topics, from history and science to biographies and culture. Explore articles, videos, quizzes, and more on Britannica's website.
Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
The free online history encyclopedia with fact-checked articles, images, videos, maps, timelines and more; operated as a non-profit organization.
Wikipedia. Wikipedia [note 3] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the use of the wiki -based editing system MediaWiki. Wikipedia is the largest and most-read reference work in history.
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An online encyclopedia, also called an Internet encyclopedia, is a digital encyclopedia accessible through the Internet. Examples include Encarta from 2000 to 2009, Wikipedia since 2001, the Encyclopædia Britannica since 2016, and Encyclopedia.com since 1998. Digitization of old content.