OA

OA Overton Arm Overton臂

OA Opera America 歌剧美国

OA Ovarian Atresia 卵巢闭锁

OA Oriental Adventures (gaming) 东方探险(游戏)

OA Operability Analysis 可操作性分析

OA Operational Assessment 操作考核

OA Odessa American (Odessa, TX, USA) 美国(奥德萨奥德萨飞行训练,美国)

OA Operating Agent 经营代理

OA Old Aspen 老阿

OA On or About 在左右

OA Orbital/Orbiter Assembly 轨道/卫星装配

OA Old Athen 老雅典的距离

OA Overhead Approach 治理方法

OA Operations Analyst 运作分析师

OA Office of the Administrator 办公室的管理员

OA Oxford Academy (Cypress, CA) 牛津学院(丝柏、钙)

OA Ordering Activity 订购活动

OA Open Agility (AKC title) 打开敏捷(AKC标题)

OA Order of the Arrow (National Honor Society of the Boy Scouts of America) 箭头的国家的荣誉学会的美国童子军

OA Operational Architecture 操作架构