| MAB | Methods Application Branch 
| Others |
| MAB | Metres Above Bottom
| Others |
| MAB | Metropolitan Area Boundary
| Others |
| MAB | Metropolitan Asylums Board
| Others |
| MAB | Miami Auto Broker
| Others |
| MAB | Michigan Association of Broadcasters
| Others |
| MAB | Mid Atlantic Ballet
| Others |
| MAB | Mikhail Aleksandrovic Bakunin
| Others |
| MAB | Milwaukee Arts Board
| Others |
| MAB | Mind and Body
| Others |
| MAB | Missile Assembly Building
| Others |
| MAB | Mizzou Alternative Breaks
| Others |
| MAB | Mobile Assault Bridge
| Others |
| MAB | Mobile Auto Bank
| Others |
| MAB | Monoclonal Anti-Body
| Others |
| MAB | Monoclonal antibodies
| Others |
| mAB | Monoclonal AntiBody
| Others |
| MAB | Monthly Average Balance
| Others |
| MAB | Moronic Assinine Boss
| Others |
| MAB | Mortgage Advice Bureau
| Others |
| MAB | Mount Airy Boyz
| Others |
| MAB | Mozilla Address Book
| Others |
| MAB | Mozilla Amazon Browser
| Others |
| MAB | Multi Architecture Binary
| Others |
| MAB | Multi Axle Bus
| Others |
| MAB | Multi Workspace Application Builder
| Others |
| MAB | Multidimensional Aptitude Battery
| Others |
| MAB | Multimedia Advertising and Broadcasting
| Others |
| MAB | Municipal Assistance Bureau
| Others |
| MAB (CDER) | Management Analysis Branch (CDER)
| Others |
| MAB (CFSAN) | Methods Application Branch (CFSAN)
| Others |
| MABA | Madison Area Builders Association
| Others |
| MABA | Madrean Archipelago Biodiversity Assessment
| Others |
| MABA | Make Alexandria Bartend Again
| Others |
| MABA | Making A Better Athlete
| Others |
| MABA | Malvern Area Betterment Association
| Others |
| MABA | Marietta Area Business Association
| Others |
| MABA | Marine Area Business Association
| Others |
| MABA | Maryland Alpaca
| Others |
| MABA | Maryland Alpaca Breeders Association
| Others |
| MABA | Maryland Association for Behavior Analysis
| Others |
| MABA | Massachusetts Auto Body Association
| Others |
| MABA | Massachusettsmassachusetts Association Of Buyer Agents
| Others |
| MABA | Master of Applied Business Analytics
| Others |
| MABA | Master of Arts in Business Administration
| Others |
| MABA | Medway Amateur Basketball Association
| Others |
| MABA | Memphis Area Bluegrass Association
| Others |
| MABA | Men Are Better At
| Others |
| MABA | Merican Association For Behavior Analysis
| Others |
| MABA | Meridian Area Business Association
| Others |