The National Symphony Orchestra (NSO) is an American symphony orchestra based in Washington, D.C. Founded in 1930 by cellist Hans Kindler, its principal performing venue is the John F. Kennedy Center for the Performing Arts. They were also the official orchestra of the annual National Memorial Day Concert and A Capitol Fourth celebrations. The NSO provides an education program that aims to expose its audiences to classical music. They also provide teaching resources to families and teachers. The NSO's educational programs include scholarships programs and opportunities for musically talented high school students who want to pursue a career in orchestral music.

An orchestra is a large instrumental ensemble typical of classical music, which combines instruments from different families. There are typically four main sections of instruments:String instruments, such as the violin, viola, cello, and double bassWoodwinds, such as the flute, oboe, clarinet, bassoon, and occasional saxophoneBrass instruments, such as the horn, trumpet, trombone, cornet, euphonium, and tubaPercussion instruments, such as the timpani, snare drum, bass drum, cymbals, triangle, tambourine, tam-tam and mallet percussion instruments