may refer to:
- Media Access Control , a channel access method
- MAC Address , the Media Access Control address of a computer networking device
- MAC Times , pieces of file system metadata identifying when certain events pertaining to a computer file occurred most recently
- MAC-unit , a hardware unit which takes a stream of numbers which get scaled and summed
- Mandatory Access Control , a technique to protect and contain computer processes, data, and system devices from misuse
- Message Authentication Code , a short piece of information used to authenticate a message
- Migration Authorisation Code , a unique identifier used by broadband consumers when they wish to switch broadband service providers
- Money Access Center , an interbank network operating ATMs and POS terminals
- Multiplexed Analogue Components , a high-definition television transmission standard
- Project MAC , a project known for releasing MACLISP
- (Historical) Management and Administrative Computing initiative (set up by HEFCE).
- Marker-And-Cell , a method for storing information used in fluid and other simulations
- Move, Add, Change, i. e., common administrational functions
- MAC, the name of the Norsk Data Assembler, an assembler on the NORD line of computers made by Norsk Data
- Mac (Birmingham) , a non-profit arts centre situated in Cannon Hill Park, Edgbaston, Birmingham, England (formerly Midlands Arts Centre)
- MAC Cosmetics , a brand of cosmetics
- MAC-10 , a submachine gun
- Magnetic Accelerator Cannon , a fictional weapon from the ''Halo'' video game series
- Manhattan Association Of Cabarets & Clubs , the Manhattan Association of Cabarets & Clubs
- Medicare Administrative Contractor {Link without Title} , an entity defined in the Medicare Prescription Drug, Improvement, And Modernization Act of 2003 in the United States
- Michigan Agricultural College , the former name of Michigan State University
- Modern Army Combatives , hand-to-hand combat training received by United States Army soldiers
- Morgan Advanced Ceramics , a ceramic manufacturing company
- Musical Arts Conference , a marching band competition circuit
- Municipal Assistance Corporation , an organization to reorganize New York City finances in 1975
- Mostafa Amar's Community , the community of the famous Egyptian singer Mostafa Amar
- Mount Aloysius College , a Catholic college in central Pennsylvania
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