MAC: Market Access and Compliance
MAD: Militärischer Abschirmdienst
MAPS: Mapping and Analysis for Public Safety
MARAD: Maritime Administration
MARSEC: Maritime Security Level
MARVEL: Machine Assisted Realization of the Virtual Electronic Library
MATRIX: Multistate Anti-Terrorism Information Exchange
MBCC: Migratory Bird Conservation Commission
MBDA: Minority Business Development Agency
MCC: Millennium Challenge Corporation
MCD: Ministry of Community Development
MCHB: Maternal and Child Health Bureau
MCTL: Militarily Critical Technologies List
MCYS: Ministry of Community Development, Youth and Sports
MDA: Maritime Domain Awareness
MDA: Missile Defense Agency
MDB: Multilateral Development Banks
MedPAC: Medicare Payment Advisory Commission
MEK: mobiles Einsatzkommando
MEP: Manufacturing Extension Partnership
MEPS: Medical Expenditure Panel Survey
MeSH: Medical Subject Headings
MGLF: Microsoft Government Leader's Forum
MICA: Ministry of Information, Communications and the Arts
MIGA: Multilateral Investment Guarantee Agency
MINDEF: Ministry of Defence
MIRP: Maritime Infrastructure Recovery Plan
MITA: Ministry of Information and the Arts
MMC: Marine Mammal Commission
MMDA: Metro Manila Development Authority
MMS: Minerals Management Service
MMWR: Morbidity and Mortality Weekly Report
MOH: Ministry of Health
MOLIS: Minority On-Line Information Service
MOM: Ministry of Manpower
MPSA: Military Postal Service Agency
MRC: Medical Reserve Corps
MRC: Mississippi River Commission
MRM: Minerals Revenue Management
MSA: Medienanstalt Sachsen-Anhalt