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Meanings and definitions for OA
What does OA stand for? What does OA mean?
- Oa, a fictional planet in the DC Comics universe
- The OA, a television series
- OpenArena, a video game
- Opie and Anthony (often "O&A"), a radio show
- Oriental Adventures, a Dungeons & Dragons sourcebook
- Orion's Arm, a science fiction project
- Obavještajna agencija, the Croatian Intelligence Agency
- Office administration
- Oficina Anticorrupción, an Argentine law enforcement agency
- Olympic Air (IATA code OA)
- Opera Australia, an opera company
- Opportunitas aequa, a Canadian organization
- Overeaters Anonymous
- Oxford Academy (California), a high school
- Orbital ATK, an aerospace company
- Ma'am OA, nickname of Andrea Veneracion, founder of the Philippine Madrigal Singers
- Oskar Andersson, Swedish cartoonist who uses the pen name O.A.
- Oa (Attica), a deme of ancient Attica
- Ocean Acres, New Jersey, United States
- Orakzai Agency, Pakistan
- The Oa, Scotland, United Kingdom
- Order of Australia, a formal honour
- Order of the Arrow, the honor society of the Boy Scouts of America
- Office automation
- Oleic acid, a fatty acid
- Open access, the free online availability of digital content from scholarly sources
- Operational amplifier, an electronic component
- Operational analysis, more generally called "operational research", a branch of applied mathematics
- Original Advocacy, in the National Forensics League
- Osteoarthritis, a disease
- Length overall (also o/a, o.a. or oa), an abbreviation for overall, used when describing the length of a ship
- Oxford Archaeology
- Oa (digraph)
- Office Action, a communication from the U.S. Patent and Trademark Office
- Old Alleynian, an old boy of Dulwich College
- Order of Appearance, a synonym for Order of battle
- Output area, an area of approximately 100 households, derived from the UK Census
- 0x0A, hexadecimal octet corresponding to ASCII line feed control character
- 0-ary (or nullary or point-free), when a function or operation takes zero operands; see Arity
- 0-age main sequence, or ZAMS, a main sequence stage in astronomy's Hertzsprung–Russell diagram
- 0 allomorph, also null allomorph, a special kind of allomorph in morphology which has the form of a null morpheme
- 0 address arithmetic, zero address arithmetic, a computer architecture feature where assignment to a physical address space is deferred until programming statement execution time
- 0 air, or zero air, an air purifier result that contains less than 0.1 ppm total hydrocarbons
- Object-oriented analysis
- Old Order Amish
- Open-ocean aquaculture
- Out of Africa
- Out of Africa theory
- The Legend of Zelda: Oracle of Ages, a video game
- Order Administration
- Order (of the) Arrow
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