| CIIA | Canadian Institute of International Affairs 
| Others |
| CIIA | Cayman Islands Insurance Association
| Others |
| CIIA | Certified International Investment Analyst
| Others |
| CIIA | Chartered Institute of Internal Auditors
| Others |
| CIIA | Christmas Island Internet Administration
| Others |
| CIIA | Collision Industry Information Assistance
| Others |
| CIIA | Construction Industry Institute Australia
| Others |
| CIIA | Critical Infrastructure Information Act
| Others |
| CIIA | Czech Institute of Internal Auditors
| Others |