| IRSI | Independent Rehabilitation Services Inc 
| Others |
| IRSI | Independent Rehabilitation Services Inc.
| Others |
| IRSI | Indian Residential School Initiative
| Others |
| IRSI | Industrial Recycling Solutions Inc
| Others |
| IRSI | Information Retrieval Society of India
| Others |
| IRSI | International Radar Symposium India
| Others |
| IRSI | International Rationality Summer Institute
| Others |
| IRSI | International Reports on Socio Informatics
| Others |
| IRSI | International Reports on Socio-Informatics
| Others |
| IRSI | International Research Services Inc
| Others |
| IRSI | International Risk Sharing Index
| Others |
| IRSI | Istituto Ricerche Sicurezza Industriale
| Others |