Music

Working with musical scores

MEI - Music Encoding Initiative http://www2.lib.virginia.edu/innovation/mei/

US Library of Congress collection of sheet music in America http://memory.loc.gov/ammem/smhtml/smhome.html

University of Indiana: http://www.dlib.indiana.edu/variations/scores/

Music Libraries and Archives

NYU American Institute for Verdi Studies - http://www.nyu.edu/projects/verdi/index.html

Online Chopin Variorum Edition: http://www.ocve.org.uk/