| Abbreviation | Definition |
|---|---|
| COS | Cooper Ornithological Society |
| COS | CO-Operative Society |
| COS | Société Canadienne d'Ophtalmologie |
| COS | Socit Canadienne d'Ophtalmologie |
| CPA | Association Canadienne de Philosophie |
| CPA | Association des Psychiatres du Canada |
| CPA | Canadian Philosophical Association |
| CPA | Canadian Psychiatric Association |
| CPA | Chinese Pharmaceutical Association |
| CPA | Société canadienne de psychologie |
| CPA | Socit canadienne de psychologie |
| CPA | -ýof |
| CPA | Zho¯ngguo´ Ya`o Xue´hui` |
| CPA | Zhongguo Yao Xuehui |
| CPA | Zhongguo Ya o Xuehui |
| CPAS | Chinese Public Administration Society |
| CPAS | Chris Purvis Appreciation Society |
| CPAS | Church Pastoral Aid Society |
| CPAWS | Canadian Parks and Wilderness Society |
| CPBS | Connemara Pony Breeders Society |