| CIRB | Campus Institutional Review Board 
| Others |
| CIRB | Canada Industrial Relations Board
| Others |
| CIRB | Capital Investment Review Board
| Others |
| CIRB | Central Institute for Research on Buffaloes
| Others |
| CIRB | Central Institutional Review Board
| Others |
| CIRB | Centre International de Recherche sur le Bilingualism
| Others |
| CIRB | Colorado Institute for Research in Biotechnology
| Others |
| CIRB | Compensation Insurance Rating Board
| Others |
| CIRB | Conflict of Interest Review Board
| Others |
| CIRB | Consortium of Independent Review Boards
| Others |
| CIRB | Construction Industry Research Board
| Others |
| CIRB | Critical Incident Review Board
| Others |
| CIRB | Crop Insurance and Reinsurance Bureau
| Others |
| CIRB | Crop Insurance Research Bureau
| Others |