| IRBM | Inland Revenue Board Of Malaysia 
| Others |
| IRBM | Institute for Research in Business Management
| Others |
| IRBM | Institute of Research in Business and Management
| Others |
| IRBM | Integrated Results Based Management
| Others |
| IRBM | Integrated River Basin Management
| Others |
| IRBM | Integrated River Basin Managment
| Others |
| IRBM | Inter-mediate Range Ballistic Missile
| Others |
| IRBM | Intermediate Range Ballistic Misison
| Others |
| IRBM | Intermediate Range Ballistic Missile
| Others |
| IRBM | Intermediate Range Ballistic Missiles
| Others |
| IRBM | Intermediate-Range Ballistic Missile
| Others |