| Acronym | Definition |
|---|
| CIRB | Centre D'informatique Pour La Région Bruxelloise (French) |
| CIRB | Comprehensive Immigration Reform Bill |
| CIRB | Canada Industrial Relations Board |
| CIRB | Canadian Immigration and Refugee Board |
| CIRB | Construction Industry Research Board |
| CIRB | Crop Insurance Research Bureau |
| CIRB | Campus Institutional Review Board (various schools) |
| CIRB | Compensation Insurance Rating Board |
| CIRB | Colorado Institute for Research in Biotechnology |
| CIRB | Capital Investment Review Board |
| CIRB | Centre Interdisciplinaire de Recherche en Biologie (French: Center for Interdisciplinary Research in Biology) |
| CIRB | Centre International de Recherche sur le Bilingualism (French) |