| Abbreviation | Definition |
|---|---|
| APANO | Aboriginal Peoples Alliance of Northern Ontario |
| APBC | Ambulance Paramedics of British Columbia |
| APCC | Association of Professional Canadian Consultants |
| APP | Animal Protection Party |
| APPC | Association des Psychothérapeutes Pastoraux du Canada |
| APTTT | Association of Professional Theatre Trainers and Teachers (Canada) |
| AQP | Alberta Quality Program |
| ARCHE | Alberta Research Centre for Health Evidence |
| ARI | Angus Reid Institute |
| ARNC | Association royale de numismatique du Canada |
| ASC | Advertising Standards Canada |
| ASCC | Associated Students of Cañada College |
| ASFC | Avocats sans frontières Canada |
| ASIRT | Alberta Serious Incident Response Team |
| ASMAC | Adhesive and Sealants Manufacturers Association of Canada |
| ASMAC | Adhesives and Sealants Manufacturers Association of Canada |
| ASTCC | American Staffordshire Terrier Club of Canada |
| ASWA | Aboriginal Skilled Workers Association |
| ATAC | Administrative Tribunal Advocates of Canada |
| ATB | Alberta Treasury Branches aka ATB Financial |