Olive, Vivienne
- (1950- ), London, England. Picture, biography, and list of works and recordings, from the Australian Music Centre.
- http://www.amcoz.com.au/composers/composer.asp?id=3440

Oosterbaan, André
- (1947- ), Amsterdam, Holland. Biography and list of works and recordings, from the Australian Music Centre.
- http://www.amcoz.com.au/composers/composer.asp?id=3308

O'Quinn, David
- Compositions with scores and sound using Sibelius Music, and links.
- http://www.sibeliusmusic.com/cgi-bin/user_page.pl?url=DOQuinn

Ouellette, Antoine
- (1960- ), Montréal, Québec. Picture, biography, list of works, and CDs, from the Canadian Music Centre.
- http://www.musiccentre.ca/apps/index.cfm?fuseaction=composer.FA_dsp_biography&authpeopleid=11543&by=O

Orton, Richard
- (1940- ), Derby, England. Picture, biography, works, commissions, recordings, and news, from Unique Music.
- http://www.uniqmusic.co.uk/

Oliver, John
- (1959- ), Vancouver, British Columbia. Picture, biography, selected works, and CDs, from the Canadian Music Centre.
- http://www.musiccentre.ca/apps/index.cfm?fuseaction=composer.FA_dsp_biography&authpeopleid=9191&by=O

Orgad, Ben-Zion
- (1926- ), Gelsenkirchen, Germany. Picture and biography, from the Israel Music Institute.
- http://www.imi.org.il/composerInfo.asp?num=118

Osborne, Nigel
- (1948- ) Picture and biography.
- http://www.music.ed.ac.uk/Contacts/Profile/NOsborne-Profile.htm

O'Leary, Jane
- (1946- ), Hartford, Connecticut. Picture, biography, and selected works, from the Contemporary Music Centre, Ireland.
- http://www.cmc.ie/composers/composer.cfm?composerID=95

O'Connell, Kevin
- (1958- ), Derry, Ireland. Picture, biography, and selected works, from the Contemporary Music Centre, Ireland.
- http://www.cmc.ie/composers/oconnell.html

O'Farrell, Anne Marie
- (1966- ), Dublin, Ireland. Picture, biography, and selected works, from the Contemporary Music Centre, Ireland.
- http://www.cmc.ie/composers/ofarrell.html

Oehring, Helmut
- (1961- ), Berlin, Germany. Biography from Boosey & Hawkes.
- http://www.boosey.com/pages/cr/composer/composer_main.asp?composerid=17585

O'Leary, Martin
- (1963- ), Dublin, Ireland. Picture, biography, and selected works, from the Contemporary Music Centre, Ireland.
- http://www.cmc.ie/composers/olearym.html

Orr, Robin
- (1909- ), Brechin, England. Picture, biography, list of works, and performances.
- http://www.scottishmusiccentre.com/robin_orr/

Ocana, Anthony
- (1980- ), Santiago, Dominican Republic. Pictures, biography, news, and sound files.
- http://www.anthonyocana.com

Olivero, Betty
- (1954- ), Tel Aviv, Israel. Picture, biography, selected works, and CDs.
- http://www.olivero.co.il/

Oppedisano, Marco
- (1971- ) Picture, biography, selected works with sound files and information, from Vox Novus.
- http://www.voxnovus.com/composer/Marco_Oppedisano.htm

Orgee, Andy
- (1958- ) Picture, biography, compositions, performances, and audio files.
- http://freespace.virgin.net/andy.orgee/index.htm

Oesterle, Michael
- (1968- ), Ulm, Germany. Picture, biography, and works.
- http://www.musiccentre.ca/CMC/dac_rca/eng/k_/Oesterle_Michael.html

Orlovich, Matthew
- (1970- ), Sydney, Australia. Picture, biography, compositions, recordings, performances, and press.
- http://www4.tpgi.com.au/morlovic

Ornstein, Leo
- (1892-2002) Picture and biography, from Other Minds.
- http://www.otherminds.org/shtml/Ornstein.shtml

Owens, Terry Winter
- Picture, biography, commissions and awards, performances, and list of works, from the American Music Center.
- http://www.terrywinterowens.com/

Ostertag, Bob
- (1957- ), Albuquerque, New Mexico. Biography, CDs, photographs, and reviews.
- http://detritus.net/ostertag/

Olofsson, Kent
- (1962- ), Karlskrona, Sweden. Biography from the Swedish Music Information Center.
- http://www.mic.stim.se/avd/mic/prod/personer.nsf/a7137b1c99bbacbe4125656a00368f66/653f8e12f014bac541256492002d3550!OpenDocument

Orenstein, Joyce E.
- List of works from New York Women Composers.
- http://www.notam02.no/~cecilieo/bio.html

Ottzen, Susan
- Composer, classical and jazz harpist, and teacher. Picture, biography, and sound files.
- http://www.mindspring.com/~ottzen/index.html

O'Neill, Nicholas
- (1970- ), Cheltenham, England. Picture, biography, selected works, and sound file, from the British Composers World Wide Web Project.
- http://www.composer.co.uk/composers/oneill.html

Olsen, Tim
- (1961- ), St. Paul, Minnesota. Biography, works, and events, from Vischer Ferry Music Publishing Co.
- http://vfmusic.bizland.com/

Oliver, Harold
- (1942- ) Includes biographical sketch, a catalog of his compositions, scores and sound files, and a brief essay.
- http://users.rowan.edu/~oliver/

Oja, Esko
- (1973- ), Tallinn, Estonia. Picture, biography, and works, from edition49.
- http://www.zzz.ee/edition49/composers/e_oja/index.htm

Odstrcil, Karel
- (1930- ), Valaske Mezirici, Czech Republic. Biography and selected works from the Czech Music Information Project.
- http://www.musica.cz/comp/odstrcil.htm

Ocker, David
- (1951- ) Picture, biography, about the music, list of works, and about 'Pynchon,' from Leissure Music Planet.
- http://www.leisureplanetmusic.com/composer/ocker/bio.htm

Obrovska, Jana
- (1930- ), Prague, Czech Republic. Biography and selected works, from the Czech Music Information Project.
- http://www.musica.cz/comp/obrovska.htm