| Acronym | Meaning |
| ADXPS | Angular Dependent X-ray Photoelectron Spectroscopy |
| AE | Acoustic Emission |
| AE-CI | All Electron-configuration Interaction |
| AEA | Acoustic Emission Analysis |
| AEA-MO | All-electron Approxn.-mol. Orbital |
| AEAPS | Auger-electron Appearance-potential Spectroscopy |
| AEC | Area Of Environmental Concern |
| AEC | Atomic Energy Commission |
| AEC | Acceptable Effluent Concentration |
| AECB | Atomic Energy Control Board |
| AECB | Acute Exacerbations Of Chronic Bronchitis |
| AECMA | European Association Of Aerospace Manufacturers |
| AED | Atomic Emission Detector |
| AED | Auger Electron Diffraction |
| AEDC | Arnold Engineering Development Center |
| AEDE | Annual Effective Dose Equivalent |
| AEE | Adverse Environmental Effect |
| AEERL | Air And Energy Engineering Research Laboratory (US EPA) |
| AEES | Auger Electron Emission Spectroscopy |
| AEFCA | All-electron Frozen-core Approximation |
| AEGIS | ATM European Group For Improvement Of Scenarios |
| AEGL | Acute Exposure Guideline Level |
| AEHA | Army Environmental Hygiene Agency |
| AEHS | Association For The Environmental Health Of Soils |
| AEI | Avalanche Electron Injection |
| AEIC | Analytical Environmental Immunochemical Consortium |
| AEM | Analytical Electron Microscopy |
| AEM | Auger Electron Microscopy |
| AEM | Acoustic Emission Monitoring |
| AEMA | Auger Electron Microanalysis |
| AEOS | Advanced Electro-Optical System |
| AEP | Auditory Evoked Potential |
| AEP | American Electric Power (USA) |
| AEPECS | Auger Electron-photoelectron Coincidence Spectroscopy |
| AEPS | Auger Electron Appearance Potential Spectroscopy |
| AER | Atmospheric And Environmental Research |
| AERC | Association Of Ecosystem Research Centers |
| AERE | Atomic Energy Research Establishment |
| AERL | Air And Energy Engineering Research Laboratory |
| AERMOD | AMS/EPA Regulatory Model |
| AERO | Association For Excellence In Reactor Operations |
| AEROCE | Atmosphere-Ocean Chemistry Experiment |
| AEROS | Aerometric And Emissions Reporting System |
| AES | American Electroplating Society |
| AES | Auger Electron Spectroscopy |
| AES | Auger Emission Spectroscopy |
| AES | Atomic Emission Spectroscopy |
| AESA | Association Of Environmental Scientists And Administrators |
| AESA | Atmospheric Effects Of Stratospheric Aircraft |
| AESOP | Airborne Experiment To Study Ozone Production |