- AECS stands for Atomic Energy Commission (Syria)
- AECS stands for Associació d’Estudiants de Ciències de la Salut (Catalan Health Sciences Students Association; Catalonia, Spain)
- AECS stands for Atomic Energy Central School (India)
- AECS stands for Association Étudiante du Cégep de Sherbrooke (French)
- AECS stands for Aeronautical Emergency Communications System (SIF)
- AECS stands for Advanced Environmental Control System
- AECS stands for Andalusian Education & Culture Solutions
- AECS stands for Automotive Electronic Control Systems (New Zealand/Australia)
- AECS stands for Advanced Entry Control System
- AECS stands for Senior Chief Aviation Electrician’s Mate (Naval Rating)
- AECS stands for Auxiliary Emission Control Strategy
- AECS stands for Average Eye Closure Speed
- AECS stands for Advanced Signal Processing – Executable Common Software
- AECS stands for Accenture Energy Consumer Services (energy)
- AECS stands for Automated Error Control System
- AECS stands for Area Environmental Compliance Specialist
- AECS stands for Acquisition E3 Control Strategy
- AECS stands for Asia Evangelical College and Seminary (Bangalore, India)
- AECS stands for Automatic Eigen Calculation System
AECS