| M&G | Maharashtra & Goa 
| Others |
| M/G | Mother and Guardian
| Others |
| MG | Champion Air
| Others |
| MG | Generic module source (Modula-3)
| Others |
| MG | Machine Gloss
| Others |
| MG | Machine God
| Others |
| MG | Machine Gun
| Others |
| MG | Madagascar
| Others |
| MG | Magic Gate
| Others |
| MG | Magina Group
| Others |
| MG | Magina Group headquorters settle on Shenzhen Magina Technology
| Others |
| MG | Magnesium
| Element |
| MG | Mahatma Gandhi
| Others |
| MG | Mahatma Ghandi
| Others |
| MG | Major Gaffes
| Others |
| MG | Major General
| Others |
| MG | Major General - Army
| Others |
| MG | Malachite Green
| Others |
| mg | Malagasy
| Others |
| MG | Malignant Glioma
| Others |
| MG | Man of God
| Others |
| MG | Management Group
| Others |
| MG | Managing Gigabytes
| Others |
| MG | Manang Genie
| Others |
| MG | Manufactured Goods
| Others |
| MG | Manuka Honey
| Others |
| MG | Many Girls
| Others |
| MG | Maraveedu Gopal
| Others |
| MG | Marc Graham
| Others |
| MG | Mark George
| Others |
| MG | Marketing Goddess
| Others |
| MG | Marketing Guru
| Others |
| MG | Maroon and Gold (school colors)
| Others |
| MG | Martians Girlfriend
| Others |
| MG | Martini Girl
| Others |
| MG | Marvel Graphics
| Others |
| MG | Mary Grace
| Others |
| MG | MaschinenGewehr
| Others |
| MG | Mass Gathering
| Others |
| MG | Mass Graves
| Others |
| MG | Master Gamers
| Others |
| MG | Master Gardener
| Others |
| MG | Master Geometry
| Others |
| MG | Master Glazier
| Others |
| MG | Master Greenkeeper
| Others |
| MG | Master Group
| Others |
| MG | Match Game
| Others |
| MG | Match Guns
| Others |
| MG | Matematicheska Gimnazia
| Others |
| MG | Mathew Gilbert
| Others |
| MG | Medal for Gallantry
| Others |
| MG | Media Gateway
| Others |
| MG | Medical Genetics
| Others |
| MG | Medication Guru
| Others |
| MG | Megagauss
| Others |
| Mg | Megagram
| Others |
| MG | MegaGrams
| Others |
| MG | Meilleur Grimper
| Others |
| MG | Memphis Group
| Others |
| MG | Mesotrophic Grassland
| Others |
| MG | Message Generator
| Others |
| MG | Meta Gaming
| Others |
| MG | Metal Gate
| Others |
| MG | Metal Gear
| Others |
| MG | Metal Gears
| Others |
| MG | Meteor Garden
| Others |
| MG | Meter Guage
| Others |
| MG | Metre Gauge
| Others |
| MG | Metropolitan Guard
| Others |
| MG | Michael Gloomburg
| Others |
| MG | Michaelis-Gutmann
| Others |
| MG | Mickey's Girl
| Others |
| MG | Mickys Girl
| Others |
| MG | Micoplasma Gallisepticum
| Others |
| MG | Microgrid
| Others |
| MG | Middle Gimbal
| Others |
| MG | Middle Grade
| Others |
| MG | Might Go
| Others |
| MG | Mikhail Gregory
| Others |
| MG | Military and Government
| Others |
| MG | Military Green
| Others |
| mG | milligauss
| Others |
| mg | milligram
| Others |
| MG | Milligram - 0.001 Gram
| Others |
| MG | Milligrams
| Others |
| MG | Million Gauss
| Others |
| MG | Minas Gerais
| Others |
| MG | Mini Grand
| Others |
| MG | Mini Grid
| Others |
| MG | Minimum Guarantee
| Others |
| MG | Minister of the Gospel
| Others |
| MG | Miracle Grade
| Others |
| MG | Mirisah Games
| Others |
| MG | Mister Green
| Others |
| MG | Mizuno Gakuen
| Others |
| MG | Mobile and Gulf Railroad
| Others |
| MG | Mobile Gear
| Others |
| MG | Mobile Generator
| Others |
| MG | Modern Greece
| Others |
| MG | Modified Gross
| Others |
| MG | Modified Gypsum
| Others |
| MG | Money Guzzler
| Others |
| MG | Monoglycerides
| Others |
| MG | Monsieur Gillenormand
| Others |
| MG | Monte Generoso
| Others |
| MG | More Giving
| Others |
| MG | More Grief
| Others |
| MG | Morning Glory
| Others |
| MG | Morris Garage
| Others |
| MG | Morris Garages
| Others |
| MG | Morris George
| Others |
| MG | Mort's Great
| Others |
| MG | Morton Goldberg
| Others |
| MG | Mostly Gross
| Others |
| MG | Motor Generator
| Others |
| MG | Motor-Generator
| Others |
| MG | Mould Growth
| Others |
| MG | Mucho Grande
| Others |
| mg | Multiline Grep
| Others |
| MG | Multiple Godzillas
| Others |
| MG | Muscle Group
| Others |
| MG | Music Group
| Others |
| MG | Musical Group
| Others |
| MG | My Girl
| Others |
| MG | My God
| Others |
| MG | My God...
| Others |
| MG | My Grandma
| Others |
| MG | My Guess
| Others |
| MG | My Guy
| Others |
| MG | Myasthenia Gravis
| Others |
| MG | Mystery Garage
| Others |
| MG | Mystery Guest
| Others |
| MG | Mystic Gohan
| Others |
| MG | The Missouri Group
| Others |
| MG | The Multivariate Garch
| Others |