Over The Counter (medications not requiring a prescription)在柜台(不需要处方药物) Over The Counter (stocks)在柜台(股票) Overseas Telecommunications Commission海外电信委员会 Officer in Tactical Command战术指挥官 Ogemaw Telephone Company (Michigan)Ogemaw电话公司(密西根州) Over The Counter场外交易 Oxytetracycline氧四环素，土霉素 Ohio Turnpike Commission俄亥俄州的收费公路的佣金 Organization for Trade Cooperation贸易合作组织 Over-the-counter柜台市场 open to custom分处方药 Organ Transplant Center器官移植中心 Officers'Training Corps军官训练团 Office of Technical Cooperation技术合作处 Office of Transport and Communications交通运输处