Organ Procurement Organization器官捐赠的组织 Orbiter Project Office卡西尼号轨道船项目办公室 Office of Public Outreach (NASA)美国国家航空和宇宙航行局展(公共) Orbiting Planetary Observatory绕轨道运行的行星 Ovamboland People's OrganizationOvamboland人民的组织 Opposite Polarity相反极性 Office of Personnel Operations办公室的人员操作 Psion OPL Output (executable file extension)心灵术士OPL扩展输出(可执行文件) Porto, Portugal - Porto (Airport Code)波尔图,葡萄牙波尔图(机场) Ohio Peace Officer俄亥俄州和平军官 One Person Operated一人操作 Optical Parametric Oscillator(s)光参量振荡器(s) Outpatient Observation门诊观察 Oil Pressure Out油压力 One Production Only (acting contracts)一个生产(代理合同)