What does MMC stand for? 

Chief Machinist's Mate

Governmental » Military

Ciudad Mante, Mexico

Regional » Airport Codes

Coastal Minelayer (Minecraft, Minelayer, Coastal)

Miscellaneous » Shipping & Sailing

Machina Muesum Committee

Community » Committees

Machina Museum Committee

Community » Museums

Machinist's Mate Chief Petty Officer

Governmental » Navy

Macro Molecular Complex

Medical » Human Genome

Macrophage-Mediated Cytotoxicity

Medical » Laboratory

Maiden Mother Crone

Miscellaneous » Funnies

Main Media Center

Computing » IT

Maine Medical Center

Governmental » State & Local -- and more...

Maintenance Management Centre

Business » Management

Major Model Change

Miscellaneous » Manufacturing

Male Medical Circumcision

Medical

Malicious Mobile Code

Computing » IT

Man Machine Code

Computing » Assembly

Mandatory Managed Copy

Computing » IT

Mandriva Management Console

Computing » IT

Manifold Mounted Converter

Miscellaneous » Automotive

Map Making Contest

Miscellaneous » Unclassified

Marijuana Media Connect

Community » News & Media

Marina Maher Communications

Miscellaneous » Unclassified

Marine Mammal Center

Community » Non-Profit Organizations

Marine Mammal Commission

Academic & Science » Ocean Science

Mario Masters Colosseum

Miscellaneous » Unclassified