| Acronym | Definition |
|---|
| IRSP | Irish Republican Socialist Party |
| IRSP | Instrumentation Radar Support Program |
| IRSP | Interdisciplinary Relationship Science Program (University of California, Los Angeles) |
| IRSP | Infrared Scene Projector |
| IRSP | Intramural Research Support Program |
| IRSP | International Review of Social Psychology (Association for the Diffusion of International Research in Social Psychology) |
| IRSP | In-Place Readiness Spares Package (US DoD) |
