Virtual Reference Desk: Encyclopedias
Encyclopaedia Britannica online 
Source for general information, short videos that can be downloaded, World Data Analyst (information on countries), world atlas, notable quotations, and Webster's Thesaurus.
Columbia Encyclopedia 
Online access to the 6th edition
Funk & Wagnalls New World Encyclopedia
Images, biographies and info in a variety of subject areas.
Grove music online
Music dictionary-encyclopedia: full-text, bibliographies, biographies, terminology, history, genres and links to images; incl. New Grove Dictionary of Music and Musicians, 2nd ed., New Grove Dictionary of Opera and New Grove Dictionary of Jazz, 2nd ed. Part of Oxford Music Online.
Symbols Encyclopedia
More than 1,600 articles about 2,500 Western signs, arranged into 54 groups according to their graphic characteristics.
TechEncyclopedia.
Covers topics related to computer and information technology.
