Organizations
- Office of Academic Affairs Administrative Unit,Organization
- Oxford Academic Journals Publisher
- Oslo Academic Press Publisher
- Oakwood University - (Huntsville, Alabama, United States) External Organization
- Optical Society of America Publisher
- Opt. Soc. America Publisher
- Opt Soc. America Publisher
- Office of the Provost and Executive Vice President Administrative Unit,Organization
- Obstetrics and Gynecology Academic Department,Organization
- Overton Research and Extension Center Center,Organization
- Ontario, Mines and Minerals Division Publisher
- Oral and Maxillofacial Surgery Academic Department,Organization
- Occidental College - (Los Angeles, California, United States) External Organization
- Our Lady of the Lake University - (San Antonio, Texas, United States) External Organization
- Ouachita Baptist University - (Arkadelphia, Arkansas, United States) External Organization
- Omni Associates Publisher
- Ohio University - (Athens, Ohio, United States) External Organization
- Obafemi Awolowo University - (Ilesa, Nigeria) External Organization
- Odlar Yurdu University - (Baku, Azerbaijan) Organization
- Oxbow Books Publisher
- Oak Knoll Books Publisher
- Ocean University of China - (Qingdao, China) External Organization
- Oklahoma Christian University - (Edmond, Oklahoma, United States) External Organization
- Oklahoma City University School of Law Publisher
- Oklahoma City University Law Review Publisher
- Oklahoma Medical Research Foundation - (Oklahoma City, Oklahoma, United States) External Organization
- Oberlin College - (Oberlin, Ohio, United States) External Organization
- Ohio State University Hospital - (Columbus, Ohio, United States) External Organization
- Offshore Technology Conference Publisher
- Oregon State University - (Corvallis, Oregon, United States) External Organization,Organization
- Ohio State Journal of Criminal Law Publisher
- Office of the Dean of Faculties Administrative Unit,Organization
- Oxford University Press on Demand Publisher
- Operative Dentistry Publisher
- Ohio State Journal on Dispute Resolution Publisher
- Old Dominion University - (Norfolk, Virginia, United States) External Organization,Organization
- Ocean Drilling Program Publisher
- Oro Editions Publisher
- Ocean Engineering Academic Department,Organization
- Ocean Engineering Academic Department,Organization
- OSU Extension Service Publisher
- Osnabruck University - (Osnabrück, Germany) Organization
- Oklahoma Panhandle State University - (Goodwell, Oklahoma, United States) External Organization
- OMICS Publishing Group Publisher
- Oelgeschlager, Gunn & Hain Publisher
- Oxford Handbooks Publisher
- Oregon Health & Science University - (Portland, Oregon, United States) External Organization
- Oklahoma Historical Society Publisher
- Open Library of the Humanities Publisher
- Osmania University - (Hyderabad, India) External Organization
- Oxford University Press, Inc. Publisher
- OAE Publishing Inc. Publisher
- OMICS International Publisher
- Oregon Review of International Law Publisher
- Okayama University - (Okayama, Okayama, Japan) External Organization
- Ohio State Law Journal Publisher
- Office of Naval Research - (Ruislip, United Kingdom) Organization
- Ohio Northern University Law Review Publisher
- Oklahoma Law Review Publisher
- Oregon Law Review Publisher
- Oxford Library of Psychology Publisher
- Ocimum Scientific Publishers Pty Ltd Publisher
- Oakland University - (Rochester, Michigan, United States) External Organization
- OpenEd Network Publisher
- Oxford University Press New York Publisher
- Oncology Nursing Society (ONS) Publisher
- Oceanography Academic Department,Organization
- Office of the President Administrative Unit,Organization
- Ohio University Press Publisher
- Ohio State University Press Publisher
- Oklahoma State University - (Stillwater, Oklahoma, United States) External Organization,Organization
- Olschki Publisher
- Oneworld Publications Publisher
- OpenEdition Publisher
- Ornithological Society Publisher
- Orthodontics Academic Department,Organization
- OSA Publisher
- OTC Publisher