| CIIR | Catholic Institute for International Relations 
| Others |
| CIIR | Center for Intelligent Information Retrieval
| Others |
| CIIR | Center for Intercultural and Indigenous Research
| Others |
| CIIR | Center for International Institutions Research
| Others |
| CIIR | Centre for Identity and Intergroup Relations
| Others |
| CIIR | Centre for Interorganisational Innovation Research
| Others |
| CIIR | China Institute of Industrial Relations
| Others |
| CIIR | Chlorobutyl Rubber
| Others |
| CIIR | Counter-Intelligence Information Report
| Others |