Encyclopedias

"User edited encyclopedia based on Wiki software. Contains articles, information on editing, and a list of differences between this encyclopedia and Wikipedia."

"Portal/concise encyclopedia offers fun activities for learning and exercising the mind. Daily articles introduce new topics in the arts, humanities, science, and technology, and provide links to related sites."

"Online publication of the Columbia Encyclopedia, Sixth Edition."

Reference source with several hypertext linked entries covering a broad variety of subjects.

Free online encyclopedia that allows users to submit their own articles for inclusion in its database.

"Electronic encyclopedia with its own content as well as over 10,000 links to the best reference sites on the Internet."

"An encyclopedia composed of information available on the Internet. MacroReference contains references to large areas of knowledge, FAQs where available, and pointers to relevant areas of the MicroReference. MicroReference contains short bits of information and references to specific subjects."

"Browsable. Based on the eleventh edition of the Encyclopedia Britannica, first published in 1911."

"Online version of the complete reference work along with dictionary, atlas, links, magazines, historical documents, audio, video, images, and 3D photographs. Requires free temporary registration with option to buy continued access."

Offers the 11th Edition Encyclopedia Britannica which is now in the public domain. All articles are searchable and alphabetized.