encyclopedia

First published in 1768. And now, available online, for a fee. With extras. A reference for the ages.

This website combines a search engine and an online encyclopedia to give more detailed and satisfying results to your searches.

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, ...Infoplease is the world's largest free reference site. Encyclopedia, Dictionary, Almanacs, and Homework Help on English, math, history, geography, science, ...

It's a database for all sorts of information conveniently divided in categories that ranges from atlas, thesaurus, dictionary and encyclopedia. Also includes quizzes and timelines.
Very clear and easy to browse with plenty of data for every need.