| Abbreviation | Definition |
|---|---|
| ACEP | Association of Consulting Engineers Pakistan |
| ACER | Asociacia pentru Compatibilitate Electromagnetic din România |
| ACER | Asociaia pentru Compatibilitate Electromagnetic din Romnia |
| ACER | Asociatia pentru Compatibilitate Electromagnetica din România |
| ACER | Romanian EMC Association |
| ACerS | American Ceramic Society |
| ACES | American Copy Editors Society |
| ACES | Applied Computational Electromagnetics Society |
| ACFAS | Association Canadienne-Franaise pour l'Avancement des Sciences |
| ACFAS | Association Canadienne-Française pour l'Avancement des Sciences |
| ACFAS | French Canadian Association for the Advancement of Science |
| ACFMN | Academia de Ciencias Físicas, Matemáticas y Naturales de Venezuela |
| ACFMN | Academia de Ciencias Fsicas, Matemticas y Naturales de Venezuela |
| ACFMN | Academy of Physical, Mathematical and Natural Sciences of Venezuela |
| ACG | Académie Canadienne du Génie |
| ACG | Acadmie Canadienne du Gnie |
| ACG | Association Canadienne de Gastroentérologie |
| ACG | Association Canadienne de Gastroentrologie |
| ACG | Association Canadienne des Géographes |
| ACG | Association Canadienne des Gographes |