| อักษรย่อ | คำเต็ม | รายละเอียด |
| AEGDM | ASEAN Experts Group on Disaster Management | |
| APEC | Asia-Pacific Economic Cooperation | |
| ASTM | American Society for Testing and Materials | |
| Asst. / Assist. | Assistant | |
| Attn. | For the attention of | |
| AF | Atrial Fibrillation | |
| AEC | ASEAN Economic Community | |
| A-X | ASEAN Minus X | |
| ATDP | The Association of Thai Textile Bleaching Dyeing Printing and Finishing Industries | |
| ASEAN | Asian-Pacific Economic Cooperation | |
