Abstract: A portable electronic device integrating compact storage for a large collection of musical scores, rapid access to any score in the collection, a display adjustable for various viewing conditions and individual needs, support for annotation that preserves the original score, and simplified page turning. The device includes two touch-sensitive displays hinged together so as to approximate the familiar form of a musical score. The device opens to display two pages of music, one on each of the touch-sensitive displays. The device may be placed on a music stand or piano ledge in the same manner as a traditional musical score. Removable mass storage medium allows virtually unlimited expansion of a score collection. Menu selection and subsequent random access to selected scores result in rapid retrieval of any score a musician may require.