1) Военный термин: Army Alaska Communications System, Army airways communications system, Army area communications system, Attitude and Antenna Control Subsystem
2) Техника: Asynchronous Address Communications Systems, attitude and antenna control system, attitude and articulation control subsystem
3) Сокращение: Airborne Advanced Communications System, Airways & Air Communications Services, Airways and Air Communications Service
4) Сетевые технологии: asynchronous address communication system, асинхронно-адресная система связи
Универсальный англо-русский словарь. Академик.ру. 2011.