IRRF
| Acronym | Definition |
|---|---|
| IRRF | Imposto de Renda Retido na Fonte (Payer-retained Income Tax; Brazil) |
| IRRF | Iraqi Relief and Reconstruction Fund |
| IRRF | International Robot Racing Federation |
| IRRF | Illinois Reference/Resource Families (genetics) |
| IRRF | Integrated Resource Recovery Facility (composting; Richmond, CA) |
| IRRF | International Relief Friendship Foundation |