| Acronym | Definition |
|---|
| CMRR | Common Mode Rejection Ratio |
| CMRR | Center for Magnetic Recording Research (University of California, San Diego) |
| CMRR | Chemistry and Metallurgy Research Replacement (Los Alamos National Laboratory) |
| CMRR | Center for Magnetic Resonance Research (various universities) |
| CMRR | Committed Monthly Recurring Revenue (prediction metric) |
| CMRR | Centre Mémoire de Ressource et de Recherche (French: Memory Resource and Research Center; est. 2005) |
| CMRR | Coal Mine Roof Rating (mining classification) |
| CMRR | Certified Mail, Return Receipt (USPS) |
| CMRR | Catskill Mountain Railroad |
| CMRR | Cascaded Microring Resonator |