OSD

OSD may refer to:

Science and medicine

 * Ocean Science Discussions, the discussion and review section of the journal Ocean Science
 * Optimal shape design, a part of the field of optimal control theory
 * Oral sedation dentistry, the oral administration of sedatives to facilitate dental procedures
 * Oral solid dose, a form of oral administration of medication
 * Osgood–Schlatter disease, an inflammation of the growth plate at the tibial tuberosity which occurs mostly in teenage boys

Technology and computing

 * Object storage device, computer data storage device that manages data as objects
 * On-screen display, a feature of visual devices like VCRs and DVD players that displays program, position, and setting data on a connected TV or computer display
 * Open Source Definition, criteria used by the Open Source Initiative to determine whether or not a software license can be considered open source
 * OpenSearch Description document, an XML file format that identifies and describes a search engine
 * Operating System Deployment, a component of Microsoft's System Center Configuration Manager product
 * Orthotropic steel deck, a roofing and bridging technique

Other uses

 * Åre Östersund Airport, Sweden, IATA airport code
 * Office of the Secretary of Defense, the principal staff of the United States Secretary of Defense
 * Officer on Special Duty, a Bangladeshi, Indian, and Pakistani civil service officer
 * Oklahoma School for the Deaf, a K-12 residential school for the deaf or hard-hearing students
 * Olympia School District, a school district in Olympia, Washington
 * One Shot Deal, a live album by Frank Zappa posthumously released in 2008
 * Oregon School for the Deaf
 * Overseas Surveys Directorate, the United Kingdom's central survey and mapping organisation for British colonies and protectorates 1984–1991
 * Oxnard Elementary School District, a school district in Oxnard, California