| Abbreviation | Definition |
|---|---|
| COSA | Confederation of Oregon School Administrators |
| COSIA | Canada's Oil Sands Innovation Alliance |
| COSIA | Central Ohio Self-Insurers Association |
| COTBC | College of Occupational Therapists of British Columbia |
| COTM | College of Occupational Therapists of Manitoba |
| COTNS | College of Occupational Therapists of Nova Scotia (Canada) |
| COTO | College of Occupational Therapists of Ontario |
| COTS | Council On Technology Services |
| CP | ComRes Pavingstone |
| CPA | Canadian Physiotherapy Association |
| CPA | Canadian Psychological Association |
| CPA | Combined Professional Associations |
| CPAA | Computer Pilots Association Of America |
| CPA-ACP | Canadian Physiotherapy Association - Association canadienne de physioth??rapie |
| CPA-ACP | Canadian Physiotherapy Association - Association canadienne de physiothérapie |
| CPAE | Commission of Professors of Adult Education |
| CPBA | Canadian Pharmacists Benefits Association |
| CPBA | Canadian Professional Bartenders Association |
| CPBA | Chinese Professional and Business Association |
| CPCA | Canadian Paint and Coatings Association |