What does MACS stand for?

Magnetic Countermine System (SAUS)

Mainline Automated Clearance System - Interstate trucking - Highway safety

Maintenance Assistance Capability Software (SAUO)

Management Administration Control System

Management & Computer Services, Inc. - Information service or system (IID)

Manned Air Combat Simulation (MCD)

Manufacturing Application Control System (SAUS)

Marine Air Control Squadron

Mass and Charge Spectroscopy

Mastoid Air Cell System - Anatomy

Maximum Aortic Cusp Separation - Medicine (DMAA)

McDonnell Automatic Checkout System - McDonnell Douglas Corp.

Media Account Control System (PDAA)

Medium-Altitude Communications Satellite

Member of the American Chemical Society

Merchant Airship Cargo Satellite (PDAA)

Metering and Accounting System (NITA)

Michigan Association of Christian Schools (SRA)

Michigan Association of Convenience Stores (SRA)

Micro and Anophthalmic Children's Society - British (NRGU)

Micro Anophthalmic Children's Society (WDAA)

Microwave Attitude Control Sensor

Middle Atmosphere in the Climate System (SAUO)

Migrant Advisory Committee

Military Aeronautical Communications Service

Military Airlift Command Service (NATG)

Missile Air-Conditioning System

Mississippi Association of Convenience Stores (SRA)

Mixed Aloha Carrier Sense (SAUO)

Mobile Acoustic Communications System

Mobile Acoustic Communication Study (SAUO)

Mobile Air Conditioning Society (EA)

Mobile Air Conditioning Society Worldwide (EA)

Mobile Armored Crew Station - Military technology (DDF)

Modem Access Control System (SAUO)

Modular Application Customizing System - Computer science (ELAL)

Modular Attitude Control Subsystem (SAUS)

Modular Attitude Control System (ACAE)

Monitoring and Control Station

Multi-Access Computer Switch - Telecommunications (TSSD)

Multiagency Coordinating System - Emergency Management (EMA)

Multiagency Coordination System - Emergency Management (EMA)

Multicenter AIDS - Acquired Immune Deficiency Syndrome Cohort Study - National Institutes of Health

Multiline Automatic Calling System (HGAA)

Multiple Acceleration Control System (SAUS)

Multiple Access Communications System - West German and Dutch

Multiple Application Connector System

Multiple Applications Control System (SAUS)

Multiple-Technique Analytical Computer System

Multiproject Automated Control System

Multipurpose Acquisition and Control System (IAA)

Multipurpose Arcade Combat Simulator - Marksmanship training - Army

Senior Chief Machine Accountant - Later, DPCS - Navy rating