| Acronym | Definition |
|---|
| MCA | Micro Channel Architecture (IBM system bus) |
| MCA | Museum of Contemporary Art |
| MCA | Millennium Challenge Account |
| MCA | Maritime and Coastguard Agency (UK) |
| MCA | Middle Cerebral Artery |
| MCA | Microsoft Certified Architect (credential program) |
| MCA | Memphis Commercial Appeal (newspaper) |
| MCA | Machine Check Architecture |
| MCA | Malaysian Chinese Association |
| MCA | Medicines Control Agency |
| MCA | Military Commissions Act of 2006 |
| MCA | Maritime & Coastguard Agency (UK) |
| MCA | Mobile Clinical Assistant (hi-tech clipboard for use in hospitals) |
| MCA | Minerals Council of Australia |
| MCA | Marine Corps Association |
| MCA | Montana Code Annotated |
| MCA | Management Consultancies Association |
| MCA | Mustang Club of America |
| MCA | Music Corporation of America |
| MCA | Monoclonal Antibodies |
| MCA | Master of Computer Applications (degree) |
| MCA | Motorcycle Accident |
| MCA | Multi Criteria Analysis |
| MCA | Multiple Correspondence Analysis |
| MCA | Metal Construction Association |
| MCA | Metabolic Control Analysis (biochemistry) |
| MCA | Multichannel Analyzer |
| MCA | Muslim Community Association |
| MCA | Mind, Culture and Activity (journal) |
| MCA | Malta Communications Authority (Malta) |
| MCA | Methylcholanthrene |
| MCA | Ministry of Corporate Affairs (India) |
| MCA | Military Construction, Army |
| MCA | Massachusetts College of Art |
| MCA | Marine Cranking Amps (automobile battery rating) |
| MCA | McAllen, Texas (border patrol sector) |
| MCA | Maternity Center Association |
| MCA | Multiple Congenital Anomalies |
| MCA | Mumbai Cricket Association (India) |
| MCA | Motor Carrier Act (BC) |
| MCA | Manufacturing Chemists Association |
| MCA | Ministry of Civil Aviation (India) |
| MCA | Missed Call Alert |
| MCA | Masters in Computer Application |
| MCA | Military Chaplains Association |
| MCA | Minimum Crossing Altitude |
| MCA | Matrimonial Causes Act |
| MCA | Maine Center for the Arts (University of Maine, Orono) |
| MCA | Maximum Credible Accident |
| MCA | Mobile Convergence Appliance (DiVitas Networks) |
| MCA | Marine Conservation Alliance (Juneau, AK) |
| MCA | Morangos Com Açucar (Portugese TV) |
| MCA | Military Claims Act |
| MCA | Minimum Circuit Ampacity |
| MCA | Model Concession Agreement (India) |
| MCA | Mission Critical Application |
| MCA | Message Channel Agent (IBM) |
| MCA | Medical Council on Alcohol |
| MCA | Mobile Combat Armor (Shogo game) |
| MCA | Multi-Channel Amplifier |
| MCA | Montana Cattlemen's Association |
| MCA | Minnesota Chiropractic Association |
| MCA | Morphological Component Analysis |
| MCA | Minimum Controllable Airspeed |
| MCA | Comprehensive Methamphetamine Control Act of 1996 (US) |
| MCA | Marine Contractors Association |
| MCA | Maharashtra Cricket Association (India) |
| MCA | Military Civic Action |
| MCA | Metropolitan Calling Area |
| MCA | Monetary Compensatory Amount |
| MCA | Michigan Court of Appeals |
| MCA | Movement Control Agency |
| MCA | Massachusetts Conveyancers Association |
| MCA | Massachusetts Certified Arborist |
| MCA | Macedonia Competitiveness Activity |
| MCA | Manning Control Authority |
| MCA | Management Control Activity |
| MCA | Multi-Channel Architecture (Eontec) |
| MCA | Morrison Christian Academy (Taiwan) |
| MCA | Mucin-Like Cancer-associated Antigen (tumoral markers) |
| MCA | Michigan Chess Association |
| MCA | Miata Club of America |
| MCA | Mauritius Chamber of Agriculture |
| MCA | Motor Car Accident |
| MCA | Missionary Church Association |
| MCA | Missouri Chess Association |
| MCA | Mohair Council of America |
| MCA | Maritime Central Airways (Eastern Provincial Airways predecessor) |
| MCA | Make Chinese Angry |
| MCA | Maryland Chess Association |
| MCA | Motor Control Assembly (Space Shuttle) |
| MCA | Material Condition Assessment |
| MCA | Machinery Condition Analysis |
| MCA | Multiple Call Arrangement |
| MCA | Military Coordinating Activity |
| MCA | Multi Chip Assembly |
| MCA | Mennonite Camping Association |
| MCA | Marion Cultural Alliance, Inc (Florida) |
| MCA | Massey Collectors Association |
| MCA | Material Control Activity |
| MCA | Managed Compliance Agreement |
| MCA | Mercy Care Advantage |
| MCA | Management Control Area |
| MCA | Mississippi Chess Association |
| MCA | Multi-Carrier Allocation |
| MCA | Member of the Conference of Consulting Actuaries |
| MCA | Maximum Calls Allowed |
| MCA | Managed Care Assembly (Medical Group Management Association) |
| MCA | McCabe Adjunct (contract bridge) |
| MCA | Minnesota Comprehensive Assesment (student test) |
| MCA | Marine Climatic Atlas of the World |
| MCA | Merchandise and Customer Assistance |
| MCA | Matrix Controller Automatic (Telcom Solutions) |
| MCA | Minnesota Consumer Alliance |
| MCA | Emcee Adam (Beastie Boys) |
| MCA | Modem Controls Assembly (Wireless) |
| MCA | Microwave Component Analyzer |
| MCA | Mission Capability Assessment |
| MCA | Medium Coverage Area (DoD SATCOM) |
| MCA | Manual-Changeover-Acknowledgement Signal (ITU-T) |
| MCA | Minimum Cruising Altitude (aviation) |
| MCA | Manitoba Charolais Association (Canada) |
| MCA | Main Combustion Assembly |
| MCA | Materials Change Activity |
| MCA | Mission Complement Analysis |
| MCA | Monitor and Control Assembly |
| MCA | Missile Command Amplifier |
| MCA | Michiana Construction Alliance (South Bend, IN) |
| MCA | Mobile Communications Area |
| MCA | Massachusetts Computer Associates, Incorporated |
| MCA | Manufacturing Change Analysis |
| MCA | Management Control Authority |
| MCA | Major CONUS Activity |
| MCA | Maximum Circuit Amperage |
| MCA | Mission Capability Areas |
| MCA | Maximum Connection Availability |
| MCA | Missing Iteration Construct Around Statements (software fault) |
| MCA | Manpower Control Authority |
| MCA | Middleton Class A (distribution) |
| MCA | Multifunction Communication Aperture |
| MCA | Multiple Crown CC Watermark (philately) |
| MCA | Millinery Credit Association |
| MCA | Midwest Communications Association |
| MCA | Michigan Conservation Association |
| MCA | Management & Command Ashore |
| MCA | Maneuver Control Applications |
| MCA | Mental Retardation/Congenital Anomaly |
| MCA | Maneuver Control Agency |
| MCA | Marin Consulting Associates |