Philadelphia Youth Orchestra
（重定向自PYO）
The Philadelphia Youth Orchestra (PYO) is a youth orchestra in Philadelphia, Pennsylvania, founded in 1939 in Germantown, Philadelphia. The Orchestra works with a "companion ensemble", the Philadelphia Young Artists Orchestra (PYAO), which was established in 1996, and Bravo Brass, a brass ensemble, which was founded in 2003. In 2007, another group, Philadelphia Region Youth String Music (PRYSM) was added to the program as a string music education ensemble. The Musicopia String Orchestra (MSO) was an ensemble created in partnership with Musicopia, an organization that provides a music education resource for schools. Founded in 2008, MSO accepts students at a range of skill levels.