| MRB | Eastern West Virginia Regional Airport / Shepherd Field, Martinsburg, West Virginia USA 
| Others |
| MRB | Macro Research Board
| Others |
| MRB | Main Reference Burst
| Others |
| MRB | Maintenance Review Board
| Others |
| MRB | Maintenance Robustness Benchmark
| Others |
| MRB | Malaysian Rubber Board
| Others |
| MRB | Management Review Board
| Others |
| MRB | Mandrivausers Romania Backports
| Others |
| MRB | Manufacturing Record Book
| Others |
| MRB | Marijuana Related Business
| Others |
| MRB | Marshall Richards Barcro
| Others |
| MRB | Martinsburg Station (MARC - AMTK)
| Others |
| MRB | Marvin Ray Burns
| Others |
| MRB | Mary Ramsay Brown
| Others |
| MRB | Matanza Riachuelo Basin
| Others |
| MRB | Material Receiving Building
| Others |
| MRB | Material Review Board
| Others |
| MRB | Materials Research Building
| Others |
| MRB | Materials Review Board
| Others |
| MRB | Materiel Readiness Branch
| Others |
| MRB | Mean Relative Bias
| Others |
| MRB | Media Resource Broker
| Others |
| MRB | Media Resource Brokering
| Others |
| MRB | Medical Recruiting Brigade
| Others |
| MRB | Medical Review Board
| Others |
| MRB | Medical Review Boards
| Others |
| MRB | Medical Review Branch
| Others |
| MRB | Melamine Resin Bonded
| Others |
| MRB | Merit Rating Board
| Others |
| MRB | Mersey River Board
| Others |
| MRB | Meta Rules Base
| Others |
| MRB | Michael R Bernstein
| Others |
| MRB | Microsoft C/C++ Multiple Resolution Bitmap graphics
| Others |
| MRB | Mid Resonance Boost
| Others |
| MRB | Misr Romanian Bank
| Others |
| MRB | Missing Right Bracket
| Others |
| MRB | Mississippi River Bar
| Others |
| MRB | Mississippi River Bottom
| Others |
| MRB | Missouri River Breaks
| Others |
| MRB | Modular Rigger's Belt
| Others |
| MRB | Mortgage Revenue Bond
| Others |
| MRB | Mortgage Revenue Bonds
| Others |
| MRB | Mortgagee Review Board
| Others |
| MRB | Multidisciplinary Research Building
| Others |
| MRB | Multiple resolution bitmap
| Others |
| MRB | Mutual Reinsurance Bureau
| Others |
| MRB | Restaraunt and Bar
| Others |