OO
OO or oo may refer to:
Science and technology
- ʻŌʻō, an extinct bird of the genus Moho
- Object-oriented programming, a computer programming paradigm
- O.O (also O.o or o.O), an emoticon to represent two eyes and a nose or mouth
Transportation
- SkyWest Airlines (IATA code: OO)
- Belgium (aircraft registration prefix: OO)
- Old Oak Common TMD, a carriage shed (Network Rail depot code: OO)
Places
- Oô, a commune in France
- Oo, Indonesia
Art and entertainment
- OO (EP), album by South Korean singer Zion.T
- OO, the production code for the 1967 Doctor Who serial The Ice Warriors
Other uses
- Oo (digraph), a digraph in orthography
- ‘O‘o stick, a traditional Hawaiian digging bar
- Original Oratory, a competitive event in high school forensic competitions
- Oakley, Inc. (NYSE stock ticker symbol: OO), subsidiary of Italian company Luxottica
- OO gauge, a 1:76.2 modelling scale in model railroading
- Official Observer, an appointed amateur radio operator
- Orange Order, a protestant fraternal order based in Northern Ireland
See also
- Double-O, producer and half of hip-hop duo o in the Hallo
- Infinity symbol (∞)
- 00 (disambiguation)
- O0 (disambiguation)
- OOO (disambiguation)
- ᅇ, an obsolete unit of the Hangul alphabet
- 0-0 (disambiguation)
- ⚭, marriage symbol
This disambiguation page lists articles associated with the title OO.
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