| CIRC | Canadian Intelligence Resource Centre 
| Others |
| CIRC | Cascadia International Rally Championship
| Others |
| CIRC | Center for Integrated Research Computing
| Others |
| CIRC | Centre international de recherche sur le cancer
| Others |
| CIRC | Chalmers International Reception Committee
| Others |
| CIRC | Chicago Indoor Rowing Championships
| Others |
| CIRC | Chinese Internet Research Conference
| Others |
| CIRC | CIRCularization Burn
| Others |
| CIRC | Circulation Improving Resuscitation Care
| Others |
| CIRC | circumcision
| Others |
| circ | circumcuision
| Others |
| CIRC | Circumstances
| Others |
| CIRC | Civitan International Research Center
| Others |
| CIRC | Climate Impacts Research Consortium
| Others |
| CIRC | Colorado Immigrant Rights Coalition
| Others |
| CIRC | Commercial Industrial Realty Council
| Others |
| CIRC | Computer Incident Response Capability
| Others |
| CIRC | Computer Incident Response Center
| Others |
| CIRC | Computer Information Resource Center
| Others |
| CIRC | Continual Intercomparison of Radiation Codes
| Others |
| CIRC | Cooperative Integrated Reading and Composition
| Others |
| CIRC | Cross Interleave Reed Solomon Code
| Others |
| CIRC | Cross- Interleaved Reed-Solomon Code
| Others |
| CIRC | Cross-Interleaved Reed-Solomon Code
| Others |
| CIRC | Cycling Independent Reform Commission
| Others |
| circ | Gloucestershire
| Others |
| circ. | circulating
| Others |