The Columbia Encyclopedia is a one-volume encyclopedia produced by Columbia University Press and in the last edition, now out of print, sold by the Gale Group. First published in 1935, and continuing its important relationship with Columbia University, the encyclopedia underwent major revisions in 1950 and 1963; the current edition is the sixth, printed in 2000. It contains over 51,000 articles totaling some 6.5 million words and has also been published in two volumes.
An electronic version of the encyclopedia is available and is licensed by several different companies for use over the World Wide Web. below. This edition, which is marked up in SGML, is updated on a quarterly basis and contains over 84,000 hyperlinked cross-references. Unlike many other major English-language encyclopedias, the complete content of the Columbia encyclopedia is available online to individual users without payment.
See also 
The Columbia Electronic Encyclopedia is available from (in alphabetical order):
- Answers.com (People) -- Free Site - Does not have popups but does have banners. Entries are separated into two groups: people, and all other subjects.
- allRefer Reference, part of allRefer -- Site has many pop-ups and banners.
- Encyclopedia.com, part of eLibrary -- Site has some banners, but no pop-ups
- Information Please, part of the Family Education Network—Site has banners
- The Free Dictionary -- Site does not have any advertisements, but some content only available with a subscription
- Yahoo! -- Site has a few banners.
- Preface to the 6th edition -- gives more information on the current edition of the Columbia Encyclopedia