MAC

: This disambiguation page is about the acronym MAC (written in all caps). See also Mac and Mack.

MAC may refer to:
* Multiplexed Analogue Components, a high-definition television transmission standard.
* MAC (cosmetics), a brand of cosmetics
* MAC times, short for "Modification, Access, and Change" times in a computer file
* MAC, the ISO 3166-1 country code, Asian Games country code and FIFA country code for Macau
* Magnetic Accelerator Cannon a fictional weapon from Halo
* Mandatory access control, a technique to protect and contain computer processes, data, and system devices from misuse
* Media Access Control, a term in computer networking
* MAC address, the Media Access Control address of a networking device
* Membrane attack complex, one of the ultimate weapons of the immune system
* Mycobacterium avium complex, an group of environmental pathogens in the Mycobacterium genus.
* Merchant Aircraft Carrier ships
* Message authentication code, in cryptography
* Metropolitan Airports Commission, the operator of airports in the Minneapolis-St. Paul region of Minnesota
* Michigan Agricultural College, the name of Michigan State University from 1909 to 1925
* Mid-American Conference, a U.S. collegiate sports conference
* Mac (Birmingham), or the Midlands Arts Centre, a venue in Birmingham, England
* Migration Authorisation Code in Internet transfer
* Michigan Aerospace Corporation, a company in Ann Arbor, Michigan, USA
* Michigan Agricultural College, the name of Michigan State University from 1909 to 1925
* Military Airlift Command, the predecessor of the Air Mobility Command of the United States Air Force
* Minimum alveolar concentration, a term used in anaesthesia
* Mobile Air Conditioning
* Casamancian Autonomous Movement, a now-defunct political party in Casamance, Senegal
* In the plain old telephone service, "moves, adds, and changes", a set of administrative tasks
* Multiply-accumulate, a computer arithmetic operation, common in digital signal processor contexts
* Archaeology Museum of Catalonia, an archaeology museum in Catalonia
* Musical Arts Conference, a marching band competition circuit
* Project MAC, a project known for releasing MACLISP, an old version of the computer programming language LISP
* Mudiad Amddiffyn Cymru, a Welsh republican organization responsible for a number of bombing incidents between 1963 and 1969
* Maranhão Atlético Clube, a Brazilian football (soccer) club