| Acronym | Definition |
|---|
| Mac | Macintosh (slang for Apple computer) |
| MAC | Media Access Control |
| MAC | Mandatory Access Control |
| MAC | Macro (File Name Extension) |
| MAC | Macau (ISO Country code) |
| MAC | Medicare Administrative Contractor |
| MAC | Macaroni |
| Mac | Macedonian (linguistics) |
| MAC | Multiple Access |
| MAC | Medium Access Control |
| MAC | Mid-American Conference |
| MAC | Message Authentication Code |
| MAC | MacPaint (File Name Extension) |
| MAC | Make-Up Art Cosmetics, Inc |
| MAC | Mark McGwire (baseball player) |
| MAC | McMaster University (Hamilton, Ontario, Canada) |
| MAC | Mycobacterium Avium Complex (medicine) |
| MAC | Media Access Controller |
| MAC | Material Adverse Change |
| MAC | Mainland Affairs Council (Taiwan) |
| MAC | Musical Arts Center |
| MAC | Mountain Athletic Conference (Pennsylvania high school athletics) |
| MAC | Immaculata |
| MAC | Moves, Adds, and Changes |
| MAC | Management Advisory Committee |
| MAC | Metropolitan Airports Commission |
| MAC | Membrane Attack Complex |
| MAC | Maximum Allowable Cost |
| MAC | Marine Aquarium Council |
| MAC | Missouri Arts Council (St Louis, MO) |
| MAC | Municipal Advisory Council |
| MAC | Military Airlift Command (US Air Force) |
| MAC | Mining Association of Canada (l'Association Minière du Canada) |
| MAC | Mid-Atlantic Center for the Arts (tours & events; Cape May, NJ) |
| MAC | Mathematics and Computation (MIT Artificial Intelligence Lab project) |
| MAC | Maximum Acceptable Concentration |
| MAC | Migration Authorisation Code (UK DSL) |
| MAC | Monitored Anesthesia Care |
| MAC | Mineralogical Association of Canada (Association Minéralogique du Canada) |
| MAC | Minimum Alveolar Concentration (measure of potency for anesthetics) |
| MAC | Main Automation Contractor |
| MAC | Maximum Allowable Concentration |
| MAC | Medium Access Controller |
| MAC | Memory Access Controller |
| MAC | Multiplier/Accumulator |
| MAC | Move, Add, Change |
| MAC | Military Assistance Command |
| MAC | Master of Arts in Counseling |
| MAC | Marginal Abatement Cost (curve; metric of costs of complying with Kyoto Protocol for reducing greenhouse gases) |
| MAC | Market Access and Compliance (US Department of Commerce) |
| MAC | MacConkey Agar (microbiological media) |
| MAC | Maximum Allowable Charge |
| MAC | Mines Action Canada |
| MAC | Management Advisory Council (FAA) |
| MAC | Mean Aerodynamic Chord |
| MAC | Municipal Assistance Corporation (New York City) |
| MAC | Mine Action Center |
| MAC | Manhattan Association of Cabarets and Clubs |
| MAC | Munich Airport Center |
| MAC | Mid-America Conference |
| MAC | Midwest Archives Conference |
| Mac | Methanosarcina Acetivorans |
| MAC | Multiple Award Contracts |
| MAC | Multicultural Advisory Committee |
| MAC | Magnetic Accelerator Cannon (Babylon 6) |
| MAC | Mobile Air Conditioner |
| MAC | Machine Aided Cognition |
| MAC | Master Addictions Counselor |
| MAc | Master of Accountancy |
| MAC | Michigan Association of Counties |
| MAC | Multi Asset Class (Oberon Financial Technology, Inc.) |
| MAC | Mid America Corvette (company) |
| MAC | Mitral Annular Calcification (echogardiography) |
| MAC | Multiplexed Analogue Components |
| MAC | Maryland Athletic Club |
| MAC | Muslim Association of Canada (Ottawa, Canada) |
| MAC | Atlantic Mackerel (FAO fish species code) |
| MAC | Maintenance Allocation Chart |
| MAC | Military Affairs Council |
| MAC | Maintaining Arc Consistency (constraint programming AI research) |
| MAC | Michigan Apple Committee |
| MAC | Moore Action Collectibles (toy company) |
| MAC | Machine Address Code |
| MAC | Mid-Atlantic Crossing |
| MAC | Memory and Aging Center |
| MAC | Mission Assurance Category |
| MAC | Manufacturing Alliance of Connecticut |
| MAC | Military Armament Corporation (produced Mac 10&11 SMGs) |
| MAC | Medical Advisory Council |
| MAC | Manitoba Arts Council |
| MAC | Marketing Advisory Committee |
| MAC | Mid-Arm Muscle Circumference |
| MAC | Ministry of Agriculture and Cooperatives |
| MAC | Mid-Atlantic Championship |
| MAC | Mapping and Analysis Center (FEMA) |
| MAC | Mixed Armistice Commission |
| MAC | Massachusetts Animal Coalition |
| MAC | Maximum Amount Contributable (US IRS) |
| MAC | Money Access Center |
| MAC | Mothers Against Circumcision |
| MAC | Multi Axis Controller |
| MAC | Mothers Against Canada (South Park) |
| MAC | Months After Contract |
| mac | Monitored Anaesthesia Care |
| MAC | Minister’s Approval Certificate (UK) |
| MAC | Masonry Advisory Council |
| MAC | Michigan Aerospace Corporation (Ann Arbor, Michigan) |
| MAC | Metropolitan Arts Commission |
| MAC | Mississippi Association of Cooperatives |
| MAC | Minimum Annual Commitment |
| MAC | Multiservice Access Concentrator (ADC Kentrox) |
| MAC | Message Authenticity Check |
| MAC | Management and Administrative Computing |
| MAC | Mouse Activated Computer (suggested acronym for Apple Macintosh computer) |
| MAC | Maningrida Arts and Culture (Aboriginal arts organisation; Maningrida, Arnhem Land, Northern Territory) |
| MAC | Multiple-Access Computing |
| MAC | Maine Athletic Conference |
| MAC | Master of Art Conservation |
| MAC | Midwest CHP Application Center |
| MAC | Maintenance Action Code |
| MAC | Manchester Athletic Club (Manchester, MA) |
| MAC | Middle America Cox (Cox-Internet) |
| MAC | Multipurpose Activity Center |
| MAC | Mediterranean Air Command (WWII) |
| MAC | Mississauga Arts Council |
| MAC | Multiple Access Communications Limited |
| MAC | Mid-Atlantic Collegiate (umpires) |
| MAC | Mobile Action Command (1970s Matchbox Division) |
| MAC | Mobile Attenuation Code (cellular term) |
| MAC | Movimento Anti-Comunista (Portuguese: Anti-Communist Movement) |
| MAC | Mean Alveolar Concentration (anesthesiology) |
| MAC | Multiple Analog Component |
| MAC | Museu da Arte Contemporânea (Sao Paulo, Brazil) |
| MAC | Multicultural Awareness Council |
| MAC | Mean Aerodynamic Center |
| MAC | Medical Affirmative Claims |
| MAC | Mobility Augmentation Company (US Army) |
| MAC | Mobility Augmentation Company |
| MAC | Mission Assignment Coordinator |
| MAC | Munitions Assembly Conveyor |
| MAC | Maneuver Area Command |
| MAC | Multi Access Controller |
| MAC | Multiphase Atmospheric Chemistry |
| MAC | Medicaid Authorization Card |
| MAC | Montana Agricultural College |
| MAC | Message Authentication Control |
| MAC | Maintenance Administration Center |
| MAC | Mass Accelerator Cannon (gaming, Halo weaponry) |
| MAC | Multiplying Accumulator |
| MAC | Municipal Amateur Coordinator |
| MAC | Multiplier Accumulator Chip |
| MAC | Magazine Association of Canada |
| MAC | Manufacturing Advisory Center |
| MAC | Management Ad Hoc Committee |
| MAC | Major Ambulatory Category |
| MAC | Minimal Antibiotic Concentration |
| MAC | Multi-Agency Coordinating Entity |
| MAC | Multifiber Array Connector |
| MAC | Multiple Architecture Computer (Hewlett-Packard) |
| MAC | Makiling Airsoft Club (Philippines) |
| MAC | Management Action Center |
| MAC | Major Area Commander |
| MAC | Material Accumulation Costing |
| MAC | Materiel Acquisition Command |
| MAC | Chief Machine Accountant (naval rating) |
| MAC | Material Accountability and Control |
| MAC | Maintenance Availability Computer |
| MAC | Mechanized Assignment and Control |
| MAC | Manitoba Action Centre (Leaf Rapids, Manitoba, Canada) |
| MAC | Maritime Area Commander |
| MAC | Multi-Sensor Air Campaign |
| MAC | Measurement and Analysis Center |
| MAC | Multiple Access Contract |
| MAC | Material Accounting Center |
| MAC | Magnetic Anomaly Concealment |
| MAC | Maximum Adjacent Cut (locksmithing) |
| MAC | Metal Anneal Chamber |
| MAC | Modular Amplification Card |
| MAC | Multiple Array Correlation |
| MAC | Mortuary Affairs Coordinator |
| MAC | Mobile Attack Cuisine (Fighting Foodons) |
| MAC | Modern Arab Contractors |
| MAC | Mainland Aviation College (New Zealand) |
| Mac | Mustang Athletic Complex |
| MAC | Men's Advisory Counsel/Committee (prisons) |
| MAC | Milestone Achievement Certificate (UK) |
| MAC | MIUW Attack Craft |
| MAC | Manually Activated Call point (fire protection systems) |
| MAC | Minneola Alliance Church (Minneola, FL) |