| Abbreviation | Definition |
|---|---|
| AIVPA | Associazione Italiana Veterinari Piccoli Animali |
| AIVR | Accelerated Idioventricular Rhythm |
| AIWC | All India Women's Conference |
| AIWHA | All India Women's Hockey Association |
| AIX | Alternate IndeX |
| AIX | Advanced Interactive eXecutive |
| AJ | Australian Junior |
| AJA | American Journal of Archaeology |
| AJAX | Asynchronous JavaScript and XML |
| AJC | American Journal of Archaeology |
| AJC | Atlanta Journal- Constitution |
| AJC | Australian Jockey Club |
| AJCC | American Joint Committee on Cancer |
| AJCOM | Anti-Jam Communications |
| AJDF | Andrew Jackson Demonstration Farm |
| AJG | African Journal of Geoinformation |
| AJP | American Journal of Physiology |
| AJSU | All Jharkhand Student Union |
| AJT | Avanced Jet Trainer |
| AJT | Aluminum Intensive Vehicle |
| AK | Applied Kinesiology |
| AK | Atwater- Kent radio |
| AK | Above the knee |
| AK | Avtomat Kalashnikova |
| AK | Analog Kernel |
| AKA | Above- Knee Amputation |
| AKA | American Kickboxing Association |
| AKA | Above Knee Amputation |
| AKC | Athletic Karate Consortium |
| AKC | All Knowing Computer |
| AKDN | Aga Khan Development Network |
| AkDT | Alaskan Daylight Time |
| AKF | Alien Kelp Farmers |
| AKF | Amateur Karate Foundation |
| AKF | Australian Karate Federation |
| AKF | Acute Kidney Failure |
| AKI | Anti Knock Index |
| AKM | Automated Key Management |
| AKMC | Automated Key Management Center |
| AKMS | Automated Key Management System |
| AKR | Anti Knocking Regulation |
| AKS | Agricultural and Knowledge Systems |
| AkST | Alaskan Standard Time |
| AKU | Adaptation Kit Upgrade |
| AKYSB | Aga Khan Youth and Sports Board |
| AL | Aluminum |
| AL | Assembly Language |
| AL | Address List |
| AL | Agricultural Labourer |
| AL | Automotive Lenses |