| MCIR | Magical Code Injection Rainbow 
| Others |
| MCIR | Map Constrained Image Reconstruction
| Others |
| MCIR | Massachusetts Coalition for Immigration Reform
| Others |
| MCIR | McHenry County Independent Riders
| Others |
| MCIR | Michigan Care Improvement Registry
| Others |
| MCIR | Midwest Center for Investigative Reporting
| Others |
| MCIR | Military Council for Iraqi Revolutionaries
| Others |
| MCIR | Mission Configuration and Implementation Requirements
| Others |
| MCIR | Music Copyright Infringement Resource
| Others |