Abbott Laboratories - Research code symbol
Calm Air International - ICAO designator (AD)
Macau - ANSI two-letter standard code (CNC)
Machine Operation (AFM)
Magnetic-Optical disc (GIS)
Magneto-Optic - Computer science
Magneto-Optical - Physics
Mail Order - Business term
Maintenance and Operating - Factor (NG)
Maintenance Officer (MCD)
Maize Oil (PDAA)
Major Objective (KSC)
Make Offer
Making Objects - Research test - Psychology
Malaoxon
Managed Object - Telecommunications (OSI)
Managed Objects - Military technology (DDF)
Management Object (SAUO)
Management Office
Management Operations (SPST)
Management Order (NOAA)
Managing Owner (RIMS)
Manned Orbiter (MCD)
Manually Operated
Manual Orientation (MCD)
Manual Output
Manufacturer's Output
Manufacturing Order (NASA)
Manufacturing Outline
March Order - Military
Marketing Organization (AD)
Mark Off
Mars Observer - Astronomy term
Mars Observer Mission (MCD)
Mars Orbiter - NASA (KSC)
Masonry Opening - Technical drawings
Mass Observation
Master of Obstetrics
Master of Oratory
Master of Osteopathy
Master Oscillator - Radio
Mature Outlook (EA)
Mechanical Obstruction (MELL)
Medial Oblique - View - Radiology (DAVI)
Medical Officer - Military
Medical Orderly (WDAA)
Medium Oocyte
Medulla Oblongata - Medicine (MELL)
Member Organisation (ACII)
Memory Operation
Memory Output - Computer science
Mesio-Occlusal - Dentistry
Mesityl Oxide - Also, MSO - Organic chemistry
Metal-Organic (AAEL)
Meteorological Office - British
Meteorology Officer (MUGU)
Method of Operation
Methoxime - Organic chemistry
Methyl Orange - Organic chemistry
Micro-Opaque
Micro-Osmometer
Microwave Oven (PDAA)
Middeck Overhead (MCD)
Military Observer (WDAA)
Military Operations - British military (DMA)
Military Orders Issued by the President as Commander in Chief of the Armed Forces - A publication (DLA)
Military Services - Diocesan abbreviation - Maryland (TOCD)
Mineral Oil
Mineral Order - Defense Minerals Exploration Administration - Department of the Interior - A publication (DLA)
Ministerstvo Oborony - Ministry of Defense - Former USSR
Ministry Outstanding (SAUO)
Minor-Oppenheim - Syndrome - Medicine (DB)
Minute Output - Of heart
Miscellaneous Operation (MUGU)
Missile Officer (AAG)
Mission Operations - NASA
Mission Oriented
Missouri - Postal code (AFM)
Missouri Supreme Court Reports - 1821-1956 - A publication (DLA)
Mitral Valve Opening - Cardiology
Mixed Oxide (NRCH)
Mobile - FCC radio station class code (FCCC)
Mobile Object - Telecommunications (OA)
Mobile Station - Air Force
Mobil Oil - Federal Railroad Administration identification code
Model Orientation (GIS)
Moderato - Moderate Speed - Music (ADA)
Moderator
Modern Orthodox (BJA)
Modification Order (AFIT)
Modulate Open - Nuclear energy (NRCH)
Modus Operandi - Police term for distinctive techniques used by criminals
Mohawk - Tire retread brand
Mohawk Airlines, Inc. - Obsolete
Molded - Construction
Molecular Orbital - Atomic physics
Moment (DSUE)
Monaco - IYRU nationality code (IYR)
Money Order - NCIC non-government securities code (NCIC)
Money Order
Monitor Output
Monooxygenase - An enzyme
Month (AFM)
Monthly Order - Navy
Months Old (MEDA)
Mooney Aircraft, Inc. - ICAO aircraft manufacturer identifier (ICAO)
Morale Operations (CARL)
Moral Obligation (MHDW)
Moravian
Morning
Morocco - Federal Information Processing Standard (FIPS) country code (GEON)
Morphin (SAUS)
Morse Code Light - or Fog Signal - Navigation signal
Mother
Motion for Mandamus Overruled - Legal term (DLA)
Motor Operated (MSA)
Motorscooter - Motor vehicle violation code used in state of Maryland (MVRD)
Moustache (DSUE)
Mouth
Move (NASA)
Movement Orders
Move Out (WDMC)
Multi-Option (MCD)
Mumps Orchitis - Medicine (MELL)
Municipal Offices (ROG)
Murphy Oil Co. Ltd. - Toronto Stock Exchange symbol
Mustered Out - of military service
No Evidence of Distal Metastasis - Oncology (DAVI)
Philip Morris Companies, Inc. - NYSE symbol (SPSG)
Mail Order (AD)
Major Objective (NAKS)
Manned Orbiter - NASA (NAKS)
Manual Operation (AD)
Manual Orientation (NAKS)
Manufacturing Order (NAKS)
Masonry Opening (AD)
Mass Observation (AD)
Master Oscillator (AD)
Method of Operation (AD)
Microoperation (MHDB)
Middeck Overhead (NAKS)
Mission Operations - NASA (NAKS)
Molecular Orbital (AD)
Moment (AD)
Month (WDMC)
Month Old - Therapy term (CTAA)
Moth Eaten (AD)
Mother (GEAB)
Motor Operated (AD)
Move (NAKS)
Mustered Out (AD)
Maestro GG1MasterGG2 - Italian (AD)
Mineral Oil (DB)
Missouri (BEE)
Missourian (AD)
Missouri Reports - A publication (AAGC)
Missouri State Library, Jefferson City, MO - Library symbol - Library of Congress (LCLS)
Mode - Statistics
Modern Reports - England - A publication (DLA)
Moloney - Strain - Medicine (DB)
Molybdenum - Chemical element
Monaldus - Flourished, 13th century - Authority cited in pre-1607 legal work (DSA)
Monday (CDAI)
Montreal Stock Exchange - Canada
Moore's English Privy Council Reports - 1836-62 - A publication (DLA)
Moore's Indian Appeals - A publication (DLA)
Morphine - Medicine (WDAA)
Morse - Nautical term (NTA)
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