| Acronym | Definition |
|---|
| IIRR➣International Institute for Rural Reconstruction (Philippines) |
| IIRR➣Instituto Internacional de Reconstrucción Rural |
| IIRR➣If I Remember Right |
| IIRR➣Institut International pour la Reconstruction Rurale |
| IIRR➣Incident Investigation, Recording & Reporting |
| IIRR➣Initial Investment Rate of Return |
| IIRR➣Iranian Islamic Republic Railway |