| Apathy Evaluation Scale | Academic & Science |
| Assigned Educational Supervisor | Academic & Science |
| American Equilibration Society | Academic & Science |
| Academic English Studies | Academic & Science |
| Aquacultural Engineering Society | Academic & Science |
| American Elasmobranch Society | Academic & Science |
| American Epilepsy Society | Academic & Science |
| Atmospheric Environment Service | Academic & Science |
| Association for Exchange Students | Academic & Science |
| Engineering Services | Academic & Science |
| Engineering Solutions | Academic & Science |
| Abrasive Engineering Society | Academic & Science |
| Amateur Electronic Supply | Academic & Science |
| Aviation Electronics Support | Academic & Science |
| Academic Excellence Scholarships | Academic & Science |
| Agricultural Experiment Station | Academic & Science |
| Aalesund | Airport Code |
| American Encryption Service | Business |
| Advanced Energy Systems, LTD. | Business |
| Automated Export System | Business |
| A E S Corporation | Business |
| American Electrophoresis Society | Business |
| Antique Electronics Supply | Business |
| Advanced Energy Systems | Business |
| Automated Evaluation System | Business |
| American Education Services | Business |
| Automotive Engine Specialties | Business |
| Automatic Electrophoresis System | Chemistry |
| Audio Engineering Society | Community |
| Amateur Entomologists Society | Community |
| American Embassy School | Community |
| Aeronautical Education Services | Community |
| Applied Educational Systems | Community |
| Accumulated Experience Sharing | Community |
| Advanced Encryption Standard-Rijndael | Computer and Networking |
| Advanced Entertainment System | Computer Hardware |
| Advanced Expert System | Computer Hardware |
| Advanced Encryption System | Computing |
| American Encryption Standard | Computing |
| Asian Elite Squad | Computing |
| Announcement Distribution System | Computing |
| Advanced Electrical Schematic | Computing |
| Acronym Experts | Computing |
| Ada Evaluation System | Computing |
| Application Environment Specification | Computing |
| Advanced Environment Specification | Computing |
| Avira Exchange Security | Computing |
| Amazon Elasticsearch Service | Computing |
| Auger Electron Emission Spectroscopy | Electronics |
| Automatic Electronic System | Electronics |
| Advanced Electronic System | Electronics |
| Anti-Embolic Stockings | General |
| Advanced Event Systems | General |
| Poly(Acrylonitrile Ethylene Propylene Styrene) | General |
| Animal Emergency Services | General |
| Aircraft Earth Station | General |
| Alkaline Earth Silicate | General |
| Active Exhaust System | General |
| Automotive Environmental Systems | General |
| Automotive Engineering Show | General |
| Automotive Engineering Services | General |
| Automotive Electrical Services | General |
| Allied Electronic Simulations | General |
| Automatic Electronic Shutter | General |
| Automotive Embedded Software | General |
| Automotive Embedded Systems | General |
| Automotive Electronics Service | General |
| Automatic Engine Shutdown | General |
| Automated Emergency Stop | General |
| Automated Enforcement System | General |
| Automatic Emergency Steering | General |
| Automotive Engineering Science | General |
| Automotive Engine Simulation | General |
| Automotive Ethernet Switch | General |
| Avenger es | General |
| Autonomous Emergency Steering | General |
| Auto Ecole Sociale | General |
| Actually Existing Socialism | Governmental |
| All Express Service | Governmental |
| Energy Storage | Governmental |
| Aeolus Energy Servicing | Governmental |
| Automatic Energy Selector | Governmental |
| Advanced Encryption Standard | Information Technology |
| Applicants Enquiry Servuce | Jobs |
| Anglo European Studbook | Medical |
| Acute Encephalitis Syndrome | Medical |
| Adult Emergency Services | Medical |
| Anterior Epidural Space | Medical |
| Antral Ethmoidal Sphenoidectomy | Medical |
| Aortic Ejection Sound | Medical |
| Atomic Emission Spectrometry | Medical |
| Adverse Events | Medical |
| Aeromonas | Medical |
| Ambulance Emergency Service | Medical |
| Army Experimentation Site | Military and Defence |
| Atccs (army Tactical Command and Control System) Experimentation Site | Military and Defence |
| Army Enterprise Strategy | Military and Defence |
| Army Education System | Military and Defence |
| Aeromedical Evacuation Squadron | Military and Defence |
| Aeromedical Evacuation System | Military and Defence |
| Atomic Emission Spectroscopy | Physics Related |
| Aalesund, Norway | Regional |
| Australian Electronic Security | Regional |
| Asynchronous Event Scheduler | Softwares |
| Application Environment Services | Softwares |
| Airborne Earth Station | Space Science |
| Analog Event System | Space Science |
| Atmosphere Exchange System | Space Science |
| Auger Electron Spectroscopy | Space Science |
| Automatic Enforcement System | Transport & Travel |