| AECS | Australia-Europe Container Service | 澳大利亚欧洲集装箱联营集团 |
| AECS | Association of European Correspondence Schools | 欧洲函授学校协会 |
| AECS | Andalusian Education & Culture Solutions | 教育及文化的安达卢西亚的解决方案 |
| AECS | Automated Error Control System | 自动错误控制系统 |
| AECS | Automotive Electronic Control Systems (New Zealand/Australia) | 汽车电子控制系统(新西兰/澳大利亚) |
| AECS | Atomic Energy Commission (Syria) | 原子能委员会（叙利亚） |
| AECS | Aeronautical Emergency Communications System (SIF) | 航空应急通信系统（SIF） |
| AECS | Advanced Environmental Control System | 先进的环境控制系统 |
| AECS | Auxiliary Emission Control Strategy | 辅助排放控制策略 |
| AECS | Area Environmental Compliance Specialist | 区域环境合规专家 |
| AECS | Asia Evangelical College and Seminary (Bangalore, India) | 亚洲福音学院和神学院（印度班加罗尔） |
| AECS | Advanced Signal Processing - Executable Common Software | 高级信号处理-可执行通用软件 |
| AECS | Senior Chief Aviation Electrician's Mate (Naval Rating) | 高级长官航空电工的伴侣(海军等级) |
| AECS | Atomic Energy Central School (India) | 原子能中心学校（印度） |
| AECS | Acquisition E3 Control Strategy | 采办E3控制策略 |
| AECS | Advanced Entry Control System | 高级进入控制系统 |
| AECS | Average Eye Closure Speed | 平均闭眼速度 |
| AECS | Association Étudiante du CÉgep de Sherbrooke (French) | Association Étudiante du CÉgep de Sherbrooke (French) |
| AECS | Automatic Eigen Calculation System | 特征值自动计算系统 |
| AECS | AssociaciÓ d'Estudiants de CiÈncies de la Salut (Catalan Health Sciences Students Association; Catalonia, Spa | AssociaciÓ d'Estudiants de CiÈncies de la Salut (Catalan Health Sciences Students Association; Catalonia, Spa |
| AECS | Automated Equipment Control System | 自动化设备控制系统 |
| AECS | Advanced Equipment Control System | 先进设备控制系统 |
| AECS | Army Environmental Cleanup Strategy | 陆军环境清理战略 |