| MS&B | Metal Stamping and Body Construction 
| Others |
| MSB | Magic School Bus
| Others |
| MSB | Main Support Battalion
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| MSB | Main Switch Board
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| MSB | Main SwitchBoard
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| MSB | Maquoketa State Bank
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| MSB | Marginal Social Benefit
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| MSB | Marigot, Netherlands Antilles
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| MSB | Marikina Street B
| Others |
| MSB | Maritime Subsidy Board
| Others |
| MSB | Market Strategy Board
| Others |
| MSB | Marshfield Student Broadcasting
| Others |
| MSB | Maryland School for the Blind
| Others |
| MSB | Mass Spectrometry Branch
| Others |
| MSB | Master of Science in Bacteriology
| Others |
| MSB | Master of Science in Business
| Others |
| MSB | Mat Su Borough
| Others |
| MSB | Matanuska Susitna Borough
| Others |
| MSB | Mate Slack Builds
| Others |
| MSB | Matra Simca Bagheera
| Others |
| MSB | Mauritius Standards Bureau
| Others |
| MSB | McDonough School of Business
| Others |
| MSB | Mean Square Between ....
| Others |
| MSB | Mechanical Sciences Block
| Others |
| MSB | Media Stream Board
| Others |
| MSB | Media Stream Broadcast
| Others |
| MSB | Medical Sciences Building
| Others |
| MSB | Medical Services Board
| Others |
| MSB | Mediterranean School of Business
| Others |
| MSB | Merchants State Bank
| Others |
| MSB | Metabolic Supplement Basic
| Others |
| MSB | Michigan State Broadcasting
| Others |
| MSB | Micro Services Bus
| Others |
| MSB | Microsoft Band
| Others |
| MSB | Microsoft Search in Bing
| Others |
| MSB | Microsoft Security Bulletin
| Others |
| MSB | Microsoft Store for Business
| Others |
| MSB | Microsoft Surface Book
| Others |
| MSB | Midsize Business
| Others |
| MSB | Military Spouse Bloggers
| Others |
| MSB | Military Superannuation and Benefits
| Others |
| MSB | Mind, Spirit, and Body
| Others |
| MSB | MineSweeping Boat
| Others |
| MSB | Minnesota School of Business
| Others |
| MSB | Minnesota Special Bitter
| Others |
| MSB | Mission Statement Builder
| Others |
| MSB | Mission Support Battalion
| Others |
| MSB | Mississippi School for the Blind
| Others |
| MSB | Missouri School for the Blind
| Others |
| MSB | Missouri School of the Blind
| Others |
| MSB | Modularen Standardbaukasten
| Others |
| MSB | Modularer Standard Baukasten
| Others |
| MSB | Mohamed Salah Bchir
| Others |
| MSB | Molecular Systems Biology
| Others |
| MSB | Money Service Business
| Others |
| MSB | Money Services Business
| Others |
| MSB | Money Services Businesses
| Others |
| MSB | Money Sex and Boozing
| Others |
| MSB | Montessori School of Beaverton
| Others |
| MSB | Mopar Small Block
| Others |
| MSB | Most Significant Bit
| Others |
| MSB | Most Significant Byte
| Others |
| MSB | Motor Show Bologna
| Others |
| MSB | Motor Sport Brakes
| Others |
| MSB | Motorized Seat Belt
| Others |
| MSB | Mount Saint Benedict
| Others |
| MSB | Mouse Select Buffer
| Others |
| MSB | Movimiento Socialista de Baleares
| Others |
| MSB | MS School for the Blind
| Others |
| MSB | Multi Service Blade
| Others |
| MSB | Multi Service Buildings
| Others |
| MSB | Multi-Service Building
| Others |
| MSB | Multiple Sclerosis Blog
| Others |
| MSB | Municipal Services Bureau
| Others |
| MSB | Municipal Stability Board
| Others |
| MSB | Murbah Swamp Beer
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| MSB | Murchie Science Building
| Others |
| MSB | Museum of Southwestern Biology
| Others |
| MSB | Music Sounding Better
| Others |
| MSB | My Spiffy Brain
| Others |