What does Mac stand for?

George McClellan - Nickname for US General - Also seen as Little Mac - Civil War term

Macassey's New Zealand Reports - A publication (DLA)

Macbeth - Shakespearean work

Macintosh - Computer science (WDMC)

Maclean's - A publication (BRI)

Macnaghten's English Chancery Reports - A publication (DLA)

Macoun - Botanist in plant scientific name (HUH)

Military Aircraft Command - Airline call sign

Macedonian - MARC language code - Library of Congress (LCCP)

Chief Machine Accountant - Later, DPC - Navy rating

E. F. MacDonald Company (SAUO)

Macadam (ADA)

Macalester College, Weyerhaeuser Library, St. Paul, MN - OCLC symbol (OCLC)

MacAndrew - Alcoholism scale

Macau - ANSI three-letter standard code (CNC)

Maccabees - Old Testament book - Roman Catholic canon (ROG)

MacConkey - Agar - Microbiology

MacConkey's - Broth - Medicine (EDAA)

Macerare - Macerate - Pharmacy

Macerated (SAUS)

Macerich Co. - NYSE symbol (SAG)

MacGregor Yacht - NCIC boat manufacturer code (NCIC)

MacGregor Yacht Corp., Costa Mesa, CA - Manufacturer code for watercraft hull identification number (USCG)

Machine-Aided Cognition - Computer project - Massachusetts Institute of Technology

MacIntosh - Blade (STED)

Mackerel - Pimp - Slang (DSUE)

Mackintosh (DSUE)

Macomb, IL - Amtrak rail station code

Macon, GA - Location identifier - FAA (FAAL)

MacPaint (SAUO)

Macro Authentication Code - Computer science

Macrocytic Erythrocyte (STED)

Macrophage (MELL)

Macula (MELL)

Macule (STED)

Madrid Automated Center (ACAE)

Magazine Area C (SAUO)

Magistrates' Appeal Cases - A publication (DLA)

Magnetic Attitude Control

Magnetic Automatic Calculator (DEN)

Magyar Athletic Club (SAUO)

Main Automation Contractor (READ)

Main Display Console

Mainland Affairs Council - China

Maintained Anesthesia Care (MELL)

Maintaining Arc Consistency (SAUS)

Maintenance Action Code (XSAL)

Maintenance Advisory Committee - NSIA

Maintenance Allocation Chart - Military

Maintenance Analysis Center - FAA

Maintenance and Construction - Computer science (IAA)

Major Activity Center

Major Air Command - Later, MAJCOM

Major Ambulatory Categories - Patient classification system (DAVI)

Malaysia Accreditation Council (SAUO)

Malecite-Passamaquoddy - Language code (ETLW)

Malignancy-Associated Changes - Cancer

Malta Air Charter Co. Ltd. - ICAO designator (FAAC)

Mammary Carcinoma - Oncology

Man Against Computer (SAUO)

Management Action Center (SAUO)

Management Ad Hoc Committee (SAUO)

Management Advisory Committee - Environmental Protection Agency (GFGA)

Management Analysis Course (SAUO)

Management Assessment Coordinator (SAUO)

Man and Computer (DIT)

Mandatory Access Control - Computer science (IGQR)

Maneuver Analysis and Command

Maneuver Area Command - Army

Mannlicher-Carcano - NCIC firearms make code (NCIC)

Manpower Advisory Committee (OICC)

Mapping Advisory Committee (SAUO)

Mapping and Analysis Center (SAUO)

Mapping Applications Center (SAUO)

Maricopa Agricultural Center (SAUO)

Marine Affairs Council - Marine science (MSC)

Marine Amphibious Corps

Marine Aquarium Council (NOAA)

Marine Artillery Consultant (ACAE)

Maritime Advisory Committee - Terminated, 1968

Maritime Air Command - Canada - NATO (NATG)

Marker and Cell - Computing technique - NASA

Market Access and Compliance

Market Access and Compliance Unit

Mark West Springs - California - Seismograph station code, US Geological Survey (SEIS)

Martial Arts Commission - British (DI)

Martins Air Charter (SAUO)

Mass Absorption Coefficient

Massive Algebraic Computation - Programming language - 1958 - Computer science (CSR)

Master Acoustical Console - Army

Master Addictions Counselor (SAUO)

Master Aperture Card (ACAE)

Master Control (MCD)

Master of Arts in Communication

Master of Arts in Counseling (PGP)

Mastoid Air Cell - Medicine (MELL)

Material Accounting Center (ABAC)

Material Availability Commitment (AAG)

Materials Analysis Co.

Materials and Coatings (SSD)

Maximal Acid Concentration (STED)

Maximal Allowable Concentration (STED)

Maximal Allowable Cost (STED)

Maximum Acceptable Concentration

Maximum Acid Concentration - Clinical chemistry

Maximum Acquisition Cost (DB)

Maximum Admissible - or Allowable Concentration

Maximum Allowable Concentration - Toxicology

Maximum Allowable Cost - Medicare, Medicaid

Maximum Atmospheric Concentration

Maximum Concentration of Organics (NAKS)

McDonnell Aircraft Co. - Later, McDonnell Douglas Corp. (MCD)

McLeod Aerating Cardiac

McMaster University - Hamilton, ON (DSUE)

Mean Aerodynamic Center

Mean Aerodynamic Chord

Measurement and Analysis Center - Telecommunications (TEL)

Measurement and Control - A publication (IAA)

Mechanical Advantage Changer

Mechanical Analog Computer (DEN)

Media Access Code (RALS)

Media Access Control - Telecommunications

Media Action Coalition - Defunct (EA)

Media Assistance Center (DNAB)

Medical Administrative Corps - Army - World War II

Medical Advisory Committee - IATA (DS)

Medical Alert Center

Medical Audit Consultants - Commercial firm

Mediterranean Air Command - Military

Mediterranean Air Company (SAUO)

Medium Access Control - Telecommunications

Medium Armored Car (SAUS)

Membership Advisory Committee (SAUO)

Membrane Affinity Chromatography

Membrane Applications Centre - University of Bath - British (CB)

Membrane Attack Complex - Biochemistry

Memory Access Command - Computer science (IAA)

Memory Access Controller

Memory-Address Counter - Computer science (IAA)

Men after Christ Band - R & B recording group

Merchant Aircraft Carrier - A ship carrying a cargo of oil or grain and provided with a flight deck for the operation of antisubmarine aircraft - British - World War II

Message Act Concellation (DA)

Message Authentication Code

Message Authenticity Check - Computer science

Metabolic and Analytical Chemistry

Metacarpal Ash per Centimeter

Metal Arc Cutting - Welding

Methotrexate, Actinomycin D, Cyclophosphamide - Antineoplastic drug regimen

Methyl Acetamido Cinnamate - Organic chemistry

Methyl Allyl Chloride - Organic chemistry

Metric Advisory Committee (SAUO)

Miami Aviation Corporation (SAUO)

Michigan Apple Committee (EA)

Microcystic Adnexal Carcinoma - Oncology

Microfilm Aperture Card

Microgravity Advisory Committee (SAUO)

Microwave-Assisted Curing - Chemical engineering

Midair Collision (IIA)

Mid-American Car - Federal Railroad Administration identification code

Mid-American Conference - College football

Midarm Circumference

Middle Atlantic Conference, East Riverdale MD - STAC

Middle Atmosphere Cooperation (SAUO)

Midwest Archives Conference (EA)

Military Aid to the Community - British military (DMA)

Military Air Command (SAUO)

Military Airlift Command - Formerly, Military Air Transport Service

Military/Allied Commission - World War II

Military and Administrative Committee (SAUO)

Military Armistice Commission (KSC)

Military Assistance Command (CINC)

Mine Action Centre (SAUO)

Mine Advisory Committee - NAS-NRC (MCD)

Mineralogical Association of Canada

Mini-Accommodation Center - In MAC-1, a low-cost, plastic sleeping module promoted by Texas businessman Charles McLaren

Minimal Access Coding - Computer science (VLIE)

Minimal Alveolar Concentration - Anesthesiology

Minimal Auditory Capability Test - Medicine

Minimum Alveolar Concentration - Physiology

Mining Association of Canada

Missile Activation Circuit

Missile Advisory Committee - Pacific Missile Range (MUGU)

Mission Assignment Code (NATG)

Mission Assignment Coordinator (SAUO)

Mitomycin C, Adriamycin, Cyclophosphamide - Antineoplastic drug regimen

Mitral Annular Calcification - Cardiology

MIUW - Mobile Inshore Undersea Warfare Attack Craft - Navy symbol

Mixed Armistice Commission - Arab-Israel borders (BJA)

Mobil Air Conditioner (EPAT)

Mobile Attenuation Code (SAUS)

Mobile Automated Correlator (ACAE)

Mobile Inshore Undersea Warfare Attack Craft - Navy (MCD)

Model Airplane Club

Model Algorithmic Control - Chemical engineering - Computer science

Modern Advanced Concrete (EFIS)

Modern Arts Criticism - A publication

Modern Authors Checklist - Publication series

Modulator of Adenylate Cyclase (DB)

Monitor and Control - Computer science (IAA)

Monitored Anesthesia Care - Medicine (DAVI)

Montana Association of Churches (EARSL)

Monthly Availability Charge (BUR)

Months After Contact (SAUO)

Months after Contract Award

Moore Action Collectibles (SAUO)

Morning-After Call - Sales

Mosaic Resources Ltd. - Vancouver Stock Exchange symbol

Mothers Against Circumcision (SAUO)

Motion Analysis Camera

Motor Ambulance Convoy

MOUT - Military Operations on Urbanized Terrain Assault Course

Moves, Adds and Changes - Telecommunications (ITD)

Movimiento Amplio Colombiano - Broad-Based Movement of Colombia - Political party (PPW)

Movimiento Autentico Cristiano - El Salvador - Political party (EY)

Movimiento de Autenticidad Colorada - Paraguay - Political party (EY)

Mudiad Amdyffyn Cymru - Welsh Defense Movement

Multi-Access Computer (VLIE)

Multiaccess Computer - A computer system in which computational and data resources are made

Multi-Access Computing (NITA)

Multiaction Computer

Multi-Agency Coordination - Fire group - USDA Forest Service (ALAC)

Multi-Analyzer Configuration (IAA)

Multi-Application Computer (IAA)

Multifunctional Automobile Communication System - Automotive engineering

Multi-Instrument Aircraft Campaign

Multiphase Atmospheric Chemistry (SAUO)

Multiple Access Computer

Multiple Access Computers - Unique address (HOME)

Multiple Access Computing (ELAL)

Multiple Access Control - Computer science (DIT)

Multiple Access Controller (SAUO)

Multiple Address Code

Multiple Address Computer (IAA)

Multiple Analogue Component - Satellite Television

Multiple Aperture Core (VLIE)

Multiple Array Correlation (CAAL)

Multiplexed Analog Component - Satellite television - British

Multiplexed Analog Components - Satellite television system

Multiply Accumulate (VLIE)

Multiply and Accumulate - Computer science

Multipurpose Arthritis Center - Medical University of South Carolina - Research center

Municipal Assistance Corp. - New York - Also known as "Big Mac"

Munitions Assignments Committee - World War II

Museum Association of the Caribbean (EAIO)

Museums Association of Canada

Musical Arts Center (SAUO)

Musiciens Amateurs du Canada - Canadian Amateur Musicians (EAIO)

Mutual Aid Centre (SAUO)

Mycobacterium Avium Complex

Mycobacterium Avium-Intracellulare Complex - Bacteriology

National Microelectronics Applications Centre - Research center (RCD)