| IRRA | Increasing Relative Risk Aversion 
| Others |
| IRRA | Independent Running Retailers Association
| Others |
| IRRA | Individual Retirement Rollover Account
| Others |
| IRRA | Industrial Relations and Research Association
| Others |
| IRRA | Industrial Relations Research Association
| Others |
| IRRA | Industrial Research Relations Association
| Others |
| IRRA | Institute for Reliability and Risk Analysis
| Others |
| IRRA | Institute of Russian Realist Art
| Others |
| IRRA | Institutional Repositories and Research Assessment
| Others |
| IRRA | Institutional Research Reporting and Analysis
| Others |
| IRRA | Integrated Radio Resource Allocation
| Others |
| IRRA | International Resort and Retailers Association
| Others |
| IRRA | International Retro Racing Association
| Others |
| IRRA | International Road Racing Assoc
| Others |
| IRRA | International Roll Racing Association
| Others |
| IRRA | Iron Range Resources Agency
| Others |
| IRRA | IRS Restructuring and Reform Act
| Others |
| IRRA | Islip Resource Recovery Agency
| Others |