Maryland Public Secondary Schools Athletic Association

The Maryland Public Secondary Schools Athletic Association (MPSSAA) is the association that oversees public high school sporting contests in the U.S. state of Maryland. Formed in 1946, the MPSSAA is made up of public high schools from each of Maryland's 23 counties and independent city of Baltimore, which joined the association in 1993 when its public high schools withdrew from the earlier longtime athletic league, the Maryland Scholastic Association (MSA) which was founded in 1919.

Source: Wikipedia — Maryland Public Secondary Schools Athletic Association (CC BY-SA 4.0)