| Acronym | Definition |
|---|
| IBRS➣International Business Reply Service (USPS) |
| IBRS➣Internet Based Registration System |
| IBRS➣Integrated Business Research Systems (UK) |
| IBRS➣Intelligent Business Research Services Pty Ltd (Australia) |
| IBRS➣Insane Black Rock Shooter (manga charcter) |
| IBRS➣Intranuclear Beryllium-Rich Structures (cell biology) |
| IBRS➣Incident Base Reporting System (law enforcement) |
| IBRS➣Interview-Based Rating Scale (psychology) |
| IBRS➣Intraoperative Blood Recovery System (cardiovascular surgery) |