| M/BR | Master Bedroom 
| Others |
| MBR | Mail Based Replication
| Others |
| MBR | Main Battery Relay
| Others |
| MBR | Main Battle Rifle
| Others |
| MBR | Main Boot Record
| Others |
| MBR | Main Buffer Register
| Others |
| MBR | Major Breakpoint Region
| Others |
| MBR | Management Box Register
| Others |
| MBR | Management By Reclining
| Others |
| MBR | Management By Reward
| Others |
| MBR | Management By Ridicule
| Others |
| MBR | Managing Behaviors and Results
| Others |
| MBR | Mangled Beyond Recognition
| Others |
| MBR | Maritime Broadband Radio
| Others |
| MBR | Massachusetts Business Roundtable
| Others |
| MBR | Master Bedroom real
| Others |
| MBR | Master Beneficiary Record
| Others |
| MBR | Master Boot Record
| Others |
| MBR | Master Boot Records
| Others |
| MBR | Master Boot Revaz
| Others |
| MBR | Master of Business Research
| Others |
| MBR | Maximum Base Rent
| Others |
| MBR | Maximum Bit Rate
| Others |
| MBR | Mayurbhanj Biological Research
| Others |
| MBR | Mbout, Mauritania
| Others |
| MBR | Mean Bit Rate
| Others |
| MBR | Mechanical Button Replacement
| Others |
| MBR | Medical Beauty Research
| Others |
| MBR | Medical Billing Reimbursement
| Others |
| MBR | Medicine Bow- Routt National Forest
| Others |
| MBR | Member
| Others |
| MBR | Member Buyer Rewards
| Others |
| MBR | Membrane Bio Reactor
| Others |
| MBR | Membrane Bio-Reactor
| Others |
| MBR | Memory Boot Record
| Others |
| MBR | Memory Box Register
| Others |
| MBR | Memory Buffer Register
| Others |
| MBR | Mercedes Benz Romania
| Others |
| MBR | Mercedes Benz Russia
| Others |
| MBR | Michael Blaze Roadcars
| Others |
| MBR | Microarray Blob Remover
| Others |
| MBR | Microwave Background Radiation
| Others |
| MBR | Migratory Bird Refuge
| Others |
| MBR | Migratory Bird Research
| Others |
| MBR | Minimum Bounding Rectangle
| Others |
| MBR | Minimum Budget Requirement
| Others |
| MBR | Mobis Brasil
| Others |
| MBR | Momentary Bit Rate
| Others |
| MBR | Monthly Budget Report
| Others |
| MBR | Moon Base Retards
| Others |
| MBR | Moscow Battallion in Russia
| Others |
| MBR | Most Beautiful Roadster
| Others |
| MBR | Motor Body Repair
| Others |
| MBR | Mountain Bike Rider
| Others |
| MBR | Mountain Block Recharge
| Others |
| MBR | Multi Band Resynthesis
| Others |
| MBR | Multi Brand Remote
| Others |
| MBR | Multidisciplinary Biopsychosocial Rehabilitation
| Others |
| MBR | Multinational Business Review
| Others |
| MBR | Multiple Bell Ringing
| Others |
| MBR | Multiple Bit Rate
| Others |
| MBR | Multiple Bomb Rack
| Others |
| MBR | My Book Ratings
| Others |