| IIRS | Illness Intrusiveness Ratings Scale 
| Others |
| IIRS | Inclusive Innovative And Reflective Societies
| Others |
| IIRS | Indian Institute of Remote Sciences
| Others |
| IIRS | Indian Institute of Remote Sensing
| Others |
| IIRS | Institute for Industrial Research and Standards
| Others |
| IIRS | International Institute of Rehabilitation Sciences
| Others |
| IIRS | Investigator Initiated Research Scheme
| Others |
| IIRS | ISRA Institute of Rehabilitation Sciences
| Others |