| IBRC | Idaho Bird Records Committee 
| Others |
| IBRC | Imagine Butte Resource Center
| Others |
| IBRC | In Band Reserved Channel
| Others |
| IBRC | Indiana Business Research Center
| Others |
| IBRC | Indonesian Biodiversity Research Center
| Others |
| IBRC | Ingestive Behavior Research Center
| Others |
| IBRC | Ingestive Behavior Research Center (Purdue University)
| Others |
| IBRC | Injury Biomechanics Research Center
| Others |
| IBRC | Innovative Bridge Research and Construction
| Others |
| IBRC | Insurance Brokers Registration Council
| Others |
| IBRC | International Bat Research Conference
| Others |
| IBRC | International Branch Research Committee
| Others |
| IBRC | International Business Resource Center
| Others |
| IBRC | Irish Bank Resolution Corporation
| Others |
| IBRC | Irish Bank Resolution Corporation Limited
| Others |