National Symphony Orchestra
The National Symphony Orchestra (NSO), founded in 1931, is an American symphony orchestra based in Washington, D.C.. Its principal performing venue is the John F. Kennedy Center for the Performing Arts.
Netherlands Chamber Orchestra
The NKO was established in 1955, and gave its first concert that year at the Holland Festival. In 1985, the NKO was merged with the Amsterdam Philharmonic Orchestra and the Utrecht Symphony Orchestra to form the "Stichting Nederlands Philharmonisch Orkest". The NKO still continues to give concerts under its own name, including a 50th anniversary commemorative concert in the Concertgebouw, Amsterdam.