| IIRC | If I Really Cared 
| Others |
| IIRC | If I Recall Correctly
| Others |
| IIRC | If I Remember Correctly
| Others |
| IIRC | If I'm Remembering Correctly
| Others |
| IIRC | If Imps Race Corvettes
| Others |
| IIRC | Illinois Interactive Report Card
| Others |
| IIRC | Image and Identity Research Collective
| Others |
| IIRC | Image Identity Research Collective
| Others |
| IIRC | Image Identity Review Committee
| Others |
| IIRC | Immunity and Infection Research Center
| Others |
| IIRC | Immunity and Infection Research Centre
| Others |
| IIRC | In Internet Relay Chat
| Others |
| IIRC | Incident Investigation and Review Committee
| Others |
| IIRC | Indiana Interstate Railway
| Others |
| IIRC | Indiana Interstate Railway Company, Inc. (was INDI)
| Others |
| IIRC | Infertility Institute and Research Center
| Others |
| IIRC | Information Integrity Research Centre
| Others |
| IIRC | Interactive Illinois Report Card
| Others |
| IIRC | International Integrated Reporting Committee
| Others |
| IIRC | International Integrated Reporting Council
| Others |
| IIRC | International Interdisciplinary Research Center
| Others |
| IIRC | International Internet Recruiting Consultants
| Others |
| IIRC | International Intersociety Researc Committee
| Others |
| IIRC | International Intersociety Research Committee
| Others |
| IIRC | International Islamic Research Center
| Others |
| IIRC | Irish Indoor Rowing Championships
| Others |
| IIRC | Islamic Institute of Religion and Culture
| Others |
| IIRC | It Is Really Cool
| Others |