| IARP | Indian Association for Radiation Protection 
| Others |
| IARP | International Advanced Robotics Programme
| Others |
| IARP | International Aging Research Portfolio
| Others |
| IARP | International Amateur Radio Permit
| Others |
| IARP | International Anthropomorphic Research Project
| Others |
| IARP | International Association of Rehabilitation Professionals
| Others |
| IARP | International Association of Reiki Professionals
| Others |
| IARP | International Association of Rock Physicists
| Others |
| IARP | Intrazone Routing Protocol
| Others |
| IARP | Inverse Address Resolution Protocol
| Others |
| IARP | Iowa Association of Railroad Passengers
| Others |
| IARP | Iraqi and American Reconciliation Project
| Others |