American Osteopathic Association美国骨病协会 Asia-Oceania-Africa (region)Asia-Oceania-Africa(地区) Activity on Arc (project management)活动对电弧(项目管理) American Optometric Association美国视力测定协会 American Orthopaedic Association美国矫形外科协会 American Orthopsychiatric Association美国行为精神病学协会 Angle Of Arrival到达角 Activity-on-Arrow双代号网络图 American Obesity Association美国肥胖协会 Angles-Of-Arrival终点角 Annual Operating Area一年一度的经营范围 Annual Operating Agreement每年运营协议 Alpha Omega Alpha (Medical Honor Society)阿尔法欧米茄α(医疗的荣誉学会) Australian Orthopaedic Association澳大利亚骨科协会 Analysis of Alternatives (formerly COEA)分析COEA选择(之前)