Prepared by various composers and musicologists, the Boston Symphony Orchestra Program Notes have provided concertgoers with a detailed musicological description of each piece performed during a given concert by this world-famous Orchestra. Approximately 137,000 pages of the Program notes, covering over 4,000 pieces performed by the BSO from 1881-1975, have been filmed as a part of this collection. Included on microfilm is an alphabetical listing by composer of each piece of music played by the Orchestra during this period and the conductor, soloist and date of performance.