All Music Guide (AMG) - encyclopedic database of music. Includes artist biographies, album reviews, and fully cross-referenced discographies that allow the user to browse from artist to artist.
Musical Heritage Network Instrument Encyclopedia - search for the instrument of your choice or browse through the collection by the Sachs-Hornbostel classification scheme or by geographical origin.
Click Herefor 50 sites you will NEED to use in 1999.