OA

Not to be confused with 0A.

OA, Oa, or oa may refer to:

People

• O.A., the penname of Swedish cartoonist Oskar Andersson

Science and technology

• Length overall (also o/a, o.a. or oa), an abbreviation for overall, used when describing the length of a ship
• Oa (digraph)
• Office automation
• Oleic acid, a monounsaturated omega-9 fatty acid
• Open access, the free online availability of digital content from scholarly sources
• Open Arena, an open source FPS
• Operational amplifier in electronics
• Operational Analysis, more generally called "Operational Research": a branch of applied mathematics
• Osteoarthritis, a degenerative disease of joints
• Original Advocacy, in the National Forensics League
• Oxford Archaeology, formerly known as "Oxford Archaeological Unit"

Geography

• Ocean Acres, New Jersey, an area in Barnegat and Stafford Township, New Jersey, USA
• The Oa, a region in Scotland, UK

Government and government agencies

• Obavještajna agencija, the Croatian Intelligence Agency
• Oficina Anticorrupción, an Argentine law enforcement agency

Private organisations

• Olympic Air, the IATA code
• Opera Australia, Australian opera company
• Opportunitas aequa, a Canadian non-governmental organization

Education

• Old Alleynian, an old boy of Dulwich College
• Oxford Academy (California), #2 ranked public high school in the United States

Honors

• Order of the Arrow, the honor society of the Boy Scouts of America
• Order of Australia, an Australian formal honour

Fiction

• Oa, a fictional planet in DC Comics
• Opie and Anthony (often "O&A"), the Opie and Anthony radio show on XM radio
• Oriental Adventures, a Dungeons & Dragons sourcebook.
• Orion's Arm, a collaborative, hard sci-fi world-building project

Other

• Overeaters Anonymous, for compulsive overeaters
• Output Area, an area of approximately 100 households derived from the UK Census
• Order of Appearance, a less-used synonym for Order of battle

See also

• OOA (disambiguation)
• 0A (disambiguation)

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