| Acronym | Definition |
|---|
| IRBA➣Independent Regulatory Board for Auditors (South Africa) |
| IRBA➣Internal Ratings Based Approach |
| IRBA➣International Reptile Breeders Association |
| IRBA➣Isle Royale Boaters Association (Houghton, MI) |
| IRBA➣Institut de Recherche Biomédicale des Armées (French: Institute for Military Biomedical Research) |
| IRBA➣Illinois Road Builders Association |
| IRBA➣Infrastructure for Regional Banking Activity (Japanese company) |
| IRBA➣Infrastructure for Regional Banking Activity (Tokyo, Japam) |
| IRBA➣International Rose Breeders Association |