AMG – All Music Guide
Biographies and brief discographies for rock, country, folk, jazz, rap groups and artists. Includes music glossary.
Internet Public Library: Music History 102
A Guide to Western Composers and their Music from the Middle Ages to the Present.
Music Education Online
Features musical resources and information on educational venues for children.
Allows you to search the details of over 44,000 opera performances since 1999 (from an archive of 85,000 since 1996)