| MRR | Macara, Ecuador 
| Others |
| MRR | Magical Resistance Rating
| Others |
| MRR | Major Repair and Renovation
| Others |
| MRR | Management Requirements Review
| Others |
| MRR | Maps of Risks and Resources
| Others |
| MRR | Marginal Reimbursement Rate
| Others |
| MRR | Market Research Report
| Others |
| MRR | Master Resale Rights
| Others |
| MRR | Master Resell Rights
| Others |
| MRR | Material Receiving Report
| Others |
| MRR | Material Removal Rate
| Others |
| MRR | Materials Reclamation Or Recovery
| Others |
| MRR | Materials Recovery And Recycling
| Others |
| MRR | Maximum Rocknroll Radio
| Others |
| MRR | Mean Reciprocal Rank
| Others |
| MRR | Mechanical Robotic Rover
| Others |
| MRR | Medial Rectus Recession
| Others |
| MRR | Medium Range Radar
| Others |
| MRR | Metric Reaming Rate
| Others |
| MRR | Michigan Rabbit Rescue
| Others |
| MRR | Micro Rain Radar
| Others |
| MRR | Microenterprise Results Reporting
| Others |
| MRR | Mid Atlantic Railroad (Carolina Southern Railroad)
| Others |
| MRR | Middle Ring Road
| Others |
| MRR | Midland Resource Recovery
| Others |
| MRR | Midwest Rotary Rendezvous
| Others |
| MRR | Minimum Residual Radiation
| Others |
| MRR | Minimum Risk Route
| Others |
| MRR | Minimum-Risk Route
| Others |
| MRR | Mission Readiness Request
| Others |
| MRR | Mission Reconfiguration Request
| Others |
| MRR | Montana River Realty
| Others |
| MRR | Monthly Recurring Rate
| Others |
| MRR | Monthly Recurring Revenue
| Others |
| MRR | Most Revealing Rear
| Others |
| MRR | Motorized Rifle Regiment
| Others |
| MRR | Multi Range Read
| Others |
| MRR | Multi Resolution Raster
| Others |
| MRR | Multi-Rate Ratio
| Others |
| MRR | Multiple Reporting Record
| Others |
| MRR | My Real Racing
| Others |