Oracle Access Manager甲骨文存取的经理 Operations，Administration and Maintenance Orthogonal Amplitude Modulation正交振幅调制 Office of Aerospace Medicine (Washington, DC)办公室的航天医学(华盛顿特区) Order of Australia Medal澳大利亚的奖牌 On A Mission执行(某一)任务, 肩负(某一)使命 Orbital Angular Momentum轨道角动量 Once A Month每月一次 Operational Asset Management操作资产管理 Office of Alternative Medicine (NIH)办公室的替代疗法(NIH) Operations, Administration & Maintenance业务、管理和维修 Online Access Manager上网的经理 Optional Assessment Materials可评估材料 Object Allocation Map (Sybase)Sybase对象分配图 Occupational Assessment & Modification职业评估和修改