OSD explained

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

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

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