||Naxos Music Library (NML) is the world's largest online classical music library, offering streaming access to more than 41,250 CDs with more than 591,100 tracks as of April, 2010. About 500 new CDs are added every month. The library includes more than 50 classical, jazz, and world music labels, and there is also film music and both classic and contemporary rock content. NML also include synopses of over 700 operas, a pronunciation guide for composer and artist names, and a glossary of musical terms. A comprehensive online encyclopedia of classical music is in development.