Army Airways Communications System军队航空通讯系统 Airborne Air Control Squadron空降空气控制中队 American Association of Christian Schools美国基督教学校 Army Alaska Communication System美军阿拉斯加通信系统 Auxiliary Attitude Control System辅助姿态控制系统 Automatic Area Control System自动地区控制系统 Advanced Access Content System (standard for content distribution and digital rights management)先进的访问内容体系(标准为内容的分布和数字版权管理) Ambient Air Control System空气控制系统 Attitude and Antenna Control Subsystem态度和天线控制系统 Acquisition Advice Code System收购建议代码系统 Alta Autoridade para a Comunicação Social (Portugal)Alta Autoridade para a Comunicação Social (Portugal) Applied Aged Care Solutions (Victoria, Australia)老年保健方案(维多利亚于澳大利亚) Airways & Air Communications Service航空公司及航空通讯服务 Authentication and Access Control System认证和访问控制系统 Airborne Astrographic Camera System空中Astrographic摄像系统