| Acronym | Definition |
|---|
| AED | Automated External Defibrillator |
| AED | Academy for Educational Development |
| AED | Automatic External Defibrillator (less common) |
| AED | Associated Equipment Distributors |
| AED | Alpha Epsilon Delta |
| AED | United Arab Emirates Dirham |
| AED | Academy for Eating Disorders |
| AED | Antiepileptic Drug |
| AED | Afghanistan Engineer District (USACE) |
| AED | AMCOM (Aviation & Missle Command) Engineering Directive |
| AED | Atomic Emission Detector |
| AED | Antiepilepsy Drug |
| AED | Aerodynamic Equivalent Diameter |
| AED | Aviation Engineering Directorate (US Army Aviation and Missile Command, AMCOM) |
| AED | Automated Engineering Design |
| AED | Air Enforcement Division (US EPA) |
| AED | Accident & Emergency Department (ER in USA, A&E or AED in UK) |
| AED | Auger Electron Diffraction |
| AED | Asociación de Estudiantes de Derecho (Association of Students of Right, Guatemala) |
| AED | Adaptive Earliest Deadline (algorithm) |
| AED | Active Expendable Decoy |
| AED | Abrams Evolutionary Design (US Army battle tank) |
| AED | Architectural Engineering Division (ASCE) |
| AED | Aircraft Engineering Division |
| AED | Astro-Electronics Division |
| AED | Analysis and Evaluation Division (EPA) |
| AED | Attraction and Entertainment Design |
| AED | À Être Déterminé (French: To Be Determined) |
| AED | Active Electronic Decoy |
| AED | Aeromedical Education Division |
| AED | Analog Event Distribution |
| AED | Area of Expertise Database |
| AED | Ammunition Engineering Directorate (Picatinny Arsenal, Dover, NJ) |
| AED | Area Emergency Director |
| AED | Architectural Engineering Directorate |
| AED | ALGOL Extended Design |
| AED | Allocations & Engineering Directorate |
| AED | Active Emission Detection |
| AED | Aeronautical Engineering Division |
| AED | Analog Event Detector |
| AED | Allocation Engineering Division |
| AED | Affranchie A l'Etranger Jusqu'a Destination (French: foreigner-prepaid postage note, 1827) |
| AED | Analog Event Display |
| AED | Analog Event Driver |
| AED | Analyse Economique et Développement (French: Economic Analysis and Development) |
| AED | Aide aux Enfants Démunis (French children's charity) |
| AED | Association des Etudiants en Droit (French: Law Students Association; various locations) |
| AED | Add, Edit and Delete (wesbite design) |
| AED | Assistant Executive Director (various organizations) |
| AED | Amortization Equalization Disbursement (Public Employees Retirement Association; Colorado) |
| AED | Agriculture Economic Development (various organizations) |
| AED | Automatic Email Deletion (records management policy) |
| AED | Aide à l'Eglise en Détresse (French: Aid to the Church in Need; est. 1947) |
| AED | Arkansas Economic Developers (est. 1976) |
| AED | Agence Européenne de Défense (French: European Defence Agency; est. 2004) |