"Based on The Concise Columbia Electronic Encyclopedia, Encyclopedia.com provides current information available in all major fields of knowledge -- from politics, law, art, and history to sports, literature, geography, science, and medicine. More than 17,000 articles provide free, quick and useful information on almost any topic. Through extensive cross-referencing, users have the option of expanding their research through direct links to other articles within the Encyclopedia.com site and to other related web sites." Note: the articles are rather short, and although the basic articles are free, they contain links to materials from the Electric Library, for which a fee is charged for access.
Online version of the popular almanac, which you can browse by topic or search. Also includes the Random House Webster's College Dictionary and the Columbia Encyclopedia.
This is an online version of the current (year 2000) edition of the Columbia Encyclopedia, a one volume, short-entry encyclopedia with over 50,000 entries.