Advanced Encryption Standard 
Auger Electron Spectroscopy 
Automated Export System 
Atmospheric Environment Service 
Ada Evaluation System 
Advanced Engineering & Sciences 
Aircraft Earth Station 
Apollo Extension System 
Atmospheric Exchange System 
Airport Emergency Service 
Application Environment Specification 
Advanced Encryption System 
Atomic Emission Spectroscopy 
Audio Engineering Society 
aeromedical evacuation squadron 
Aeromedical Evacuation System 
Aeronautical Earth Station 
aerospace and electronic systems 
Antenna Electronics 
Application Environment Service 
Atmospheric Environmental Service 
atomic emission spectrometry 
Auger emission spectroscopy 
Automatic Emulation Switching 
Adaptive Equipment Specialist 
Aerospace Electrical Society 
Agricultural Experiment Station 
Air and Energy Staff 
All Electric Ship 
American Electroplating Society