| Abbreviation | Definition |
|---|---|
| ATB | Around the Bay Road Race |
| ATCCC | Adult Teen Challenge of Central Canada |
| ATSC | Apparel Textile Sourcing Canada |
| ATSC | Autism Treatment Services Of Canada |
| AUCC | Association des Universités et Collèges du Canada |
| AVAC | Association of Veterinary Acupuncturists of Canada |
| AWBC | Academics without Borders Canada |
| AWCBC | Association of Workers Compensation Boards of Canada |
| AWMAC | Architectural Woodwork Manufacturers Association of Canada |
| AYEDI | Afghan Youth Engagement and Development Initiative |
| BACS | British Association for Canadian Studies |
| BAFC | BajanCanadian and ASFJerome Fan Club |
| BAO | Bereavement Authority of Ontario |
| BBBSY | Big Brothers Big Sisters of York |
| BBCC | Baptist Bible College Canada |
| BC | Before Canada |
| BC | British Columbia |
| BCAA | British Columbia Automobile Association |
| BCAHA | British Columbia Amateur Hockey Association |
| BCAO | Burma Canadian Association of Ontario |