OA

OA Orienteering Australia (Australian Capital Territory) 越野识途比赛(澳大利亚北领地)

OA Occiput Anterior (fetal position) 枕骨前(胎儿位置)

OA Offered Again 又献

OA Operations Aerographer 操作Aerographer

OA Orchestra Atlanta (Atlanta, GA) (亚特兰大老鹰乐队,GA)

OA Orthogonal Acceleration (mass spectrometry) 正交加速度(质谱法)

OA Online Alumni 去同学录

OA Osmotic Adjustment 渗透调节

OA Organizational Assessment 组织评估

OA Orange Anime (Florida japanese culture and media club) 橙色动漫(佛罗里达日本文化和媒体的俱乐部)

OA Ordered Aggregate (Differentiated Services Protocol) 命令骨料(分化服务协议)

OA Operational Assist/Assembly 操作协助/装配

OA Orbiter Ancillary 探测器辅助

OA Order Administration 订单管理

OA Online Academy 在线学院

OA Origin Agent (transportation industry) 产地(运输业)

OA Office of Audits 办公室的审核

OA Order of Avalon (gaming) (游戏)的凯尔特韵调

OA Old Assyrian 老亚述人

OA Orbit Area 轨道区域