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OO or oo may refer to: * Oakley, Inc., NYSE stock ticker symbol OO * Object-oriented programming, a computer programming paradigm * Official Observer, an appointed amateur radio operator * Oô, a commune in France * ‘Ō‘ō, an extinct bird of the genus ''Moho'' * Oo (digraph), a digraph in orthography * OO gauge, a 1:76.2 modelling scale in model railroading * O.O (also O.o or o.O), an emoticon to represent two eyes and a nose or mouth * OO, the ICAO aircraft registration prefix for Belgium * OO, the Network Rail depot code for the carriage shed at Old Oak Common TMD * Original Oratory, a competitive event in high school forensic competitions * SkyWest Airlines, IATA code OO == See also == * 00 (disambiguation) * ∞, a symbol used to indicate infinity * ᅇ, an obsolete unit of the Hangul alphabet * Double-O, a producer and half of hip-hop duo Kidz in the Hall * O0 (disambiguation) * OOO (disambiguation) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OO」の詳細全文を読む スポンサード リンク
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