| mB | Body wave magnitude 
| Others |
| MB | Machine Batch
| Others |
| MB | Mad Bear
| Others |
| MB | Magnificent Bastard
| Others |
| MB | Mail Box
| Others |
| MB | Main Battle
| Others |
| MB | Main Board
| Others |
| MB | Main Branch
| Others |
| MB | Main Bronchus
| Others |
| MB | Main Building
| Others |
| MB | Main Bus
| Others |
| MB | Make Better
| Others |
| MB | Malcolm Blight, Australian rules football player and coach
| Others |
| MB | Mallory body
| Others |
| MB | Mamillary Body
| Others |
| MB | Mamma Bull
| Others |
| MB | Mammillary Body
| Others |
| MB | Management Baseline
| Others |
| MB | Mango Butternut
| Others |
| MB | Manila Bulletin
| Others |
| MB | Manitoba
| State |
| MB | Many Bad
| Others |
| MB | Marching Band
| Others |
| MB | Marcus Baker
| Others |
| MB | Marine Board
| Others |
| MB | Mario Badescu
| Others |
| MB | Mark Burnett
| Others |
| MB | Marker Beacon
| Others |
| MB | Marriage Bond
| Others |
| MB | Martyn Brown
| Others |
| MB | Mary Beth
| Others |
| MB | Mary Boyd
| Others |
| MB | Mastarite Berg
| Others |
| MB | Master Blaster
| Others |
| MB | Master of Biotechnology
| Others |
| MB | Masterbatch
| Others |
| MB | Masters Of The Bands
| Others |
| MB | Maternal Blood
| Others |
| MB | Mathematica Binary file
| Others |
| MB | Maureen Bunyan
| Others |
| MB | Maurizio Bianchi
| Others |
| MB | Mavis Beacon
| Others |
| MB | Maxi Boots
| Others |
| MB | Maximum Babeage
| Others |
| MB | Maxine Bloomberg
| Others |
| MB | Maya Binary
| Others |
| MB | MB abbreviation
| Others |
| MB | McKenzie Brothers
| Others |
| MB | Measured Business
| Others |
| MB | Mechanical Bull
| Others |
| MB | Medal of Bravery
| Others |
| MB | Media Bureau
| Others |
| MB | Media Buyer
| Others |
| MB | Medical Billing
| Others |
| MB | Medium Base
| Others |
| MB | Medium Boat
| Others |
| MB | Medium Business
| Others |
| MB | medulloblastoma
| Others |
| MB | Mega Babe
| Others |
| MB | Mega Bit
| Others |
| MB | Mega Bite
| Others |
| MB | Mega Britain
| Others |
| MB | Mega Byte
| Others |
| MB | Mega Bytes
| Others |
| Mb | Megabarn
| Others |
| MB | MegaBase
| Others |
| Mb | Megabit
| Others |
| MB | Megabit Byte
| Others |
| Mb | Megabit(s)
| Others |
| Mb | Megabits
| Others |
| MB | Megabyte
| Others |
| MB | MegaByte (1 Million Bytes)
| Others |
| MB | MegaByte(s)
| Others |
| MB | MegaBytes
| Others |
| MB | Megabytes The Bigger
| Others |
| MB | Mel Broiles
| Others |
| MB | Memory Barrier
| Others |
| MB | Menteri Besar
| Others |
| MB | Mercedes Benz
| Others |
| MB | Mercedes-Benz
| Others |
| MB | Merchant Bank
| Others |
| MB | Meridian and Bigbee Railroad (M&B Railroad)
| Others |
| MB | Meridian and Bigbee Railroad Company
| Others |
| MB | Message Board
| Others |
| MB | Metal Bracelet
| Others |
| MB | Methyl Bromide
| Others |
| MB | Methylene Blue
| Others |
| MB | Metkemeijer Brendel
| Others |
| MB | Micah Brian
| Others |
| MB | Michael Bigburp
| Others |
| MB | Michael Bigmoneybags
| Others |
| MB | Michael Billionbooger
| Others |
| MB | Michael Bloomin' Nothingburger
| Others |
| MB | Michael Bloomin' socialist
| Others |
| MB | Michael Bloomingidiot
| Others |
| MB | Michael Bummerburger
| Others |
| MB | Michael Doomberg
| Others |
| MB | Mid Bounce
| Others |
| MB | midbrain
| Others |
| MB | Middle Blocker
| Others |
| MB | Might Be
| Others |
| MB | Might Blow
| Others |
| MB | Mighty Busy
| Others |
| MB | Migratory Bird
| Others |
| MB | Mike Bavis
| Others |
| MB | Mike Bibby
| Others |
| MB | Mike Boat
| Others |
| MB | Mikel Bolander
| Others |
| MB | MikroBitti
| Others |
| MB | Milli Byte
| Others |
| mb | millibar
| Others |
| mb | millibarn
| Others |
| mB | millibel
| Others |
| MB | Million Bases
| Others |
| MB | Milton Bradley
| Others |
| MB | Milwaukee's Best
| Others |
| MB | Mindless Behavior
| Others |
| MB | Mindless Behavior (Boy Band)
| Others |
| MB | Mindless Behaviour
| Others |
| MB | Mindless Bloomin' Dictator
| Others |
| MB | Minimum Bid
| Others |
| MB | Miracle Baby
| Others |
| MB | Mirror Box
| Others |
| MB | Mishneh Berura
| Others |
| MB | Missing Bin
| Others |
| MB | Mistake Bound
| Others |
| MB | Mister Bill
| Others |
| MB | Mister Bird
| Others |
| MB | Mixed Bundling
| Others |
| MB | Mixing Box
| Others |
| MB | MLC Burwood
| Others |
| MB | Mobile Bearing
| Others |
| MB | Modern Bass
| Others |
| MB | Module Build
| Others |
| MB | Molecular Biology
| Others |
| MB | Molecular Biophysics
| Others |
| MB | Molte Bello (Italian coin grade equivalent to Fine)
| Others |
| MB | Momma Bull
| Others |
| MB | Monogram by
| Others |
| MB | Monza e Brianza
| Others |
| MB | More Beer
| Others |
| MB | Mother Baby
| Others |
| MB | Mother Board
| Others |
| MB | Mother Brain
| Others |
| MB | Motherboard
| Others |
| MB | Motherboards B
| Others |
| MB | Motion Based
| Others |
| MB | Mountain Brothers
| Others |
| MB | Mounting Base
| Others |
| MB | Mouse Button
| Others |
| MB | Moving Boundary
| Others |
| MB | Moyal Bracket
| Others |
| MB | Mozhet Byt
| Others |
| MB | Mullet Brotherhood
| Others |
| MB | Multi-Block
| Others |
| MB | Multi-Bunch
| Others |
| MB | Municipal Borough
| Others |
| MB | Muon Barrel
| Others |
| MB | Murder Boys
| Others |
| MB | Muscle Back
| Others |
| MB | Muscle Balance
| Others |
| MB | Muskegon Boys
| Others |
| MB | My Bad
| Others |
| MB | My Bank
| Others |
| MB | Myocardial B
| Others |
| MB | Myocardial Bridge
| Others |
| Mb | Myoglobin
| Others |
| MB | Myron Bolitar
| Others |
| MB | Myrtle Beach
| Others |
| MB | Paradox Memo field values for database
| Others |
| MB | The Maple Book
| Others |
| MB | The Milk Beast
| Others |