| AAR | Alliance for Aging Research |
|---|---|
| ABR | Applied Benefits Research |
| ACRP | Association of Clinical Research Professionals |
| ADR | Applied Data Research |
| ALHAMBRA | typ vozidla SEAT |
| ALTEA | model Seata |
| ARI | Army Research Institute |
| AROSA | model Seata |
| ASOL | Americal Schools of Oriental Research (skr.) |
| ASR | Air Sea Rescue |