| IRENE | Image Reconstruct Erase Noise Etc 
| Others |
| IRENE | Image Reconstruction Eliminate Noise Etc
| Others |
| IRENE | Institute for Research and Education on Negotiation in Europe
| Others |
| IRENE | Integrated Resources for Evaluating Numerical Estimates
| Others |
| IRENE | International Restructuring Education Network Europe
| Others |