Oliver, Harold - (1942- ) Includes biographical sketch, a catalog of his compositions, scores and sound files, and a brief essay. Olsen, Tim - (1961- ), St. Paul, Minnesota. Biography, works, and events, from Vischer Ferry Music Publishing Co. O'Neill, Nicholas - (1970- ), Cheltenham, England. Picture, biography, selected works, and sound file, from the British Composers World Wide Web Project. Ostertag, Bob - (1957- ), Albuquerque, New Mexico. Biography, CDs, photographs, and reviews. Ornstein, Leo - (1892-2002) Picture and biography, from Other Minds. Oppedisano, Marco - (1971- ) Picture, biography, selected works with sound files and information, from Vox Novus. Ocana, Anthony - (1980- ), Santiago, Dominican Republic. Pictures, biography, news, and sound files. Orr, Robin - (1909- ), Brechin, England. Picture, biography, list of works, and performances. Oehring, Helmut - (1961- ), Berlin, Germany. Biography from Boosey and Hawkes. Orgee, Andrew - The web site contains: a short biography, a list of works, music samples, a photo gallery, and a contact form. O'Connell, Kevin - (1958- ), Derry, Ireland. Picture, biography, and selected works, from the Contemporary Music Centre, Ireland. O'Leary, Jane - (1946- ), Hartford, Connecticut. Picture, biography, and selected works, from the Contemporary Music Centre, Ireland. O'Farrell, Anne Marie - (1966- ), Dublin, Ireland. Picture, biography, and selected works, from the Contemporary Music Centre, Ireland. O'Leary, Martin - (1963- ), Dublin, Ireland. Picture, biography, and selected works, from the Contemporary Music Centre, Ireland.