Dictionaries, Thesauruses, Pictures, and Press Releases
- Orel, Dobroslav
- Orfeo ed Euridice
- Orgad, Ben-Zion
- Organ Solo Mass
- organistrum
- Orgelbüchlein
- Orgeni, Aglaja (real name, Anna Maria von Görger St. Jörgen)
- Orgitano
- orgue de Barberie
- orgue expressif
- ORiada, Seán
- Óriada, Seán
- Orkis, Lambert (Thomas)
- Orlandi, Ferdinando
- Orlandini, Giuseppe Maria
- Orlando Paladino
- Orloff, Vladimir
- Orlov, Nikolai (Andreievich)
- Orlowski, Antoni
- Ormandy, Eugene (real name, Jenö Blau)