| Acronym | Definition |
|---|
| MAB | Monoclonal Antibody |
| MAB | Man and Biosphere (UNESCO) |
| MAB | Mortgage Advice Bureau (UK) |
| MAB | Marine Air Base (US Navy) |
| MAB | Movimento dos Atingidos por Barragens (Portuguese: Movement of People Affected by Dams; Brazil) |
| MAB | Michael Angelo Batio (musician) |
| MAB | Man and the Biosphere Programme |
| MAB | Memory Address Bus |
| MAB | Multi Workspace Application Builder |
| MAB | Mail Address Book |
| MAB | Mike Andersen Band |
| MAB | Middle-Atlantic Bight |
| MAB | Muslim Association of Britain |
| MAB | Michigan Association of Broadcasters |
| MAB | Malaysian Association for the Blind |
| MAB | Monitoring and Assessment of Biodiversity (Smithsonian Institution) |
| MAB | Magyar Akkreditációs Bizottság (Hungarian: Hungarian Accreditation Committee) |
| MAB | Medical Ambulance Bus (Sartin Services, Inc.) |
| MAB | Munitions Assignment Board (US Navy) |
| MAB | Mozilla Amazon Browser |
| MAB | Medicaid Advisory Board (Vermont) |
| MAB | Medical Association of Billers (est. 1995; Las Vegas, NV) |
| MAB | Master of Agribusiness |
| MAB | Montreal Association for the Blind |
| MAB | Marine Amphibious Brigade |
| MAB | Maine Association of Broadcasters |
| MAB | Mesenchymoangioblasts (cells) |
| MAB | Mark After Break (DMX 512 protocol term) |
| MAB | Mitsubishi Asset Brains (investment advisory firm; Japan) |
| MAB | Multicast Address Broker |
| MAB | Meters Above Bottom (oceanography) |
| MAB | Marine Advisory Board |
| MAB | Missile Assembly Building |
| MAB | Master Address Book (Lotus Notes / Domino) |
| MAB | MAC Authentication Bypass (Cisco 802.1x alternative) |
| MAB | Mitchells and Butlers PLC (stock symbol) |
| MAB | Mobile Application Builder |
| MAB | Magazine Advertising Bureau |
| MAB | Managing Assaultive Behavior (nursing certification) |
| MAB | Material Advisory Board (National Research Council, Washington, DC) |
| MAB | Magyar Felsõoktatási Akkreditációs Bizottság (Hungarian Higher Education Accreditation Committee) |
| MAB | Maximum Allowable Burp |
| MAB | Magazine Area B |
| MAB | Mobile Floating Assault Bridge-Ferry |
| MAB | Maximum Assignable Bandwidth |
| MAB | Meubel- en Autobekledingsbedrijf |
| MAB | Mid-Atlantic Border Collie Rescue (Maryland) |
| MAB | Maximum Allowable Biomass (fish farming) |
| MAB | Minimum Autonomous Block |
| MAB | Major Activity Budget |
| MAB | MEU (Marine Expeditionary Unit) Amphibious Baseline (Navy/Marine Corps) |
| MAB | Musée Automobile de Bellenaves (French: Bellenaves Automobile Museum; Bellenaves, France) |