Publisher Desc.  CD Sheet Music(TM) is the revolutionary series of masterworks on CD- or DVD-ROM that transforms a PC or MAC computer into a virtual music library. Now you can quickly locate, view and print the great works of the classical repertoire. Compared to traditional printed sheet music or music downloads, it is incredibly inexpensive. Original sources are out-of-copyright standard editions from publishers such as Breitkopf and Hartel, C.F. Peters, G. Schirmer, Carl Fischer, G. Ricordi, Durand and many others. The discs also include biographical and analytical information from Grove's Dictionary of Music and Musicians, 1911 Edition. This 2 CD set contains the vocal scores of all 28 Verdi operas, from the early and obscure (Oberto, Alzira) to the most famous (Aida, Otello). Extensive bookmarks and the helpful index of titles and arias makes finding specific sections or scenes quick and easy.