Coastal Minehunter (SAUS)
Historical Committee of the Mennonite Church (EA)
MAD - Magnetic Anomaly Detector Hunting Circle (NVT)
Madras High Court Reports - India - A publication (DLA)
Major Histocompatibility Complex - Immunology
Managed Health Care (SAUO)
Manipulator Hand Controller - Aerospace (NAKS)
Manipulator Handset Controller (MCD)
Manufactured Home Communities - NYSE symbol (SPSG)
Manufacturers Hanover Corp. (EFIS)
Marine Concepts, Tarpon Springs, FL - Manufacturer code for watercraft hull identification number (USCG)
Mars Hill College - North Carolina
Mary Holmes College, West Point, MS - OCLC symbol (OCLC)
Mason & Hanger Corp.
Material Handling Crane - Autocrane (MCD)
Materials Handling Crane (SAUS)
Materiel Handling Crane - Military technology (DDF)
Mauritian Housing Corporation (SAUO)
Meadowbrook Healthcare, Inc. (MHID)
Mean Horizontal Candle - Aerospace
Mechanical-Hydraulic Control - Nuclear energy (NRCH)
Mediterranean Committee for Thalassemia (SAUO)
Mental Health Care - British (DAVI)
Mental Health Center (MEDA)
Mental Health Clinic (DAVI)
Mental Health Commission (SAUO)
Mental Health Course - British
Mental Hygiene Clinic (IDYL)
Metal Hydride Compressor
Mild Hydrocracking - Petroleum technology
Minehunter, Coastal - Navy symbol
Mobile Housing Carriers Conference Inc., Arlington VA - STAC
Mocho - Language code (ETLW)
Modified Huffman Coding (NITA)
Moisture Holding Capacity
Morgan Horse Club - Later, American Morgan Horse Association (EA)
Morris Harvey College - West Virginia
Mount Hamilton - Lick Observatory - California - Seismograph station code, US Geological Survey (SEIS)
Mount Holyoke College - South Hadley, MA
Multiphasic Health Checkup - Medicine (AAMN)
Myosin Heavy Chain - Muscle biology
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