| Abbreviation | Definition |
|---|---|
| CAMWS | Classical Association of the Middle West and South |
| CAN | Association Canadienne des Neurosciences |
| CAN | Canadian Association for Neuroscience |
| CanWEA | Association Canadienne d'Énergie Éolienne |
| CanWEA | Association Canadienne d'nergie olienne |
| CanWEA | Canadian Wind Energy Association |
| CAO | Argentina Council of Ophthalmology |
| CAO | Association Canadienne des Optométristes |
| CAO | Association Canadienne des Optomtristes |
| CAO | Association Canadienne des Orthodontistes |
| CAO | Canadian Association of Orthodontists |
| CAO | Consejo Argentino de Oftalmologa |
| CAO | Consejo Argentino de Oftalmología |
| CAOS | Calgary Animated Objects Society |
| CAOS | Chapeltown Amateur Operatic Society |
| CAP | Association Canadienne des Palynologues |
| CAP | Association Canadienne des physiciens et physiciennes |
| CAP | Canadian Association of Palynologists |
| CAP | Canadian Association of Physicists |
| CAPS | - x |