| Acronym | Definition |
|---|
| MSG | Message |
| MSG | Monosodium Glutamate |
| MSG | Master Sergeant (US military) |
| MSG | Message (logging abbreviation) |
| MSG | Message file (file name extension) |
| MSG | Massage |
| MSG | Michael Schenker Group (rock band) |
| MSG | Mission Support Group (USAF) |
| MSG | Marketing Systems Group |
| MSG | Ministère des Services Gouvernementaux (French: Ministry of Government Services) |
| MSG | Mobile Suit Gundam (Japanese animated series) |
| MSG | Marketing Services Group |
| MSG | Marine Security Guard |
| MSG | Marketing Solutions Group (various locations) |
| MSG | Middle School Girls |
| MSG | Mein schöner Garten (German magazine) |
| MSG | Maximum Specific Gravity (paving mixture) |
| MSG | Management Services Group |
| MSG | Meteosat Second Generation |
| MSG | Maine State Government |
| MSG | Major Surface Glycoprotein |
| MSG | Management Steering Group |
| MSG | Maui Surfer Girls (Puunene, HI) |
| MSG | Microgravity Science Glovebox |
| MSG | Muscle-Specific Genes |
| MSG | Multiservice Security Gateway |
| MSG | Mobilized Solutions Guide |
| MSG | Multimedia Service Gateway |
| MSG | Messaging |
| MSG | Maintenance Steering Group |
| MSG | Program Message (File Name Extension) |
| MSG | Main Switchgear (electrical engineering) |
| MSG | Management Systems Group |
| MSG | Maine Sea Grant (University of Maine) |
| MSG | Madison Square Garden, LP (New York, NY, USA) |
| MSG | Melanesian Spearhead Group |
| MSG | Maîtrise de Sciences de Gestion (France) |
| MSG | Media Solutions Group (various locations) |
| MSG | Miranda Sex Garden (band) |
| MSG | Maintenance Support Group |
| MSG | Maximum Stable Gain |
| MSG | Mycoses Study Group |
| MSG | Macromolecular Structure Group (University of California at San Francisco) |
| MSG | Missouri State Guard |
| MSG | Mattole Salmon Group (Petrolia, CA) |
| MSG | Masters of Science Gerontology (degree) |
| MSG | Message Region |
| MSG | Moe’s Southwest Grill (Atlanta, Georgia restaurant chain) |
| MSG | Manchester Sports Guild (UK) |
| MSG | Marine Strike Group (US DoD) |
| MSG | Masculine Singular |
| MSG | Music Support Group |
| MSG | Medium Silver Grey |
| MSG | Mobile Storage Group (UK/US onsite storage provider company) |
| MSG | Materiel Systems Group |
| MSG | Managed Solutions Group, Inc. |
| MSG | Modelling and Simulation Group |
| MSG | Medium Spring Green |
| MSG | Missouri State Government (US) |
| MSG | Madison Songwriters Group (Madison, WI) |
| MSG | Media Support Group |
| MSG | Mean Subject Grade (Hwa Chong Institution Singapore) |
| MSG | Mobile Support Group |
| MSG | Mountain States Group (Boise, ID) |
| MSG | Medical Super God |
| MSG | Machine Stress Grading |
| MSG | Medical Student Government |
| MSG | Metamorphic Studies Group |
| MSG | melanocyte-specific gene |
| MSG | Maple Story Global (MMORPG) |
| MSG | Musik- und Sportgemeinschaft |
| MSG | Martin-Schongauer-Gymnasium (Breisach, Germany) |
| MSG | McCauley-Schenker Group |
| MSG | Male Sex Guide |
| MSG | Michigan Silversmiths Guild |
| MSG | Maintenance and Service Guide (Compaq) |
| MSG | Mesemb Study Group |
| MSG | Middle Silk Gland (silkworms) |
| MSG | Mercyhurst Student Government (Mercyhurst College, Erie, PA, USA) |
| MSG | Metering Service Gesellschaft mbH (Germany) |
| MSG | My Special Girlfriend (Boris song) |
| MSG | minimum stable generation |
| MSG | mature secretory granule |
| MSG | Metro Seattle Gamers (Seattle, WA, USA) |
| MSG | Mikhail Sergeyevich Gorbachev (former USSR president and Nobel Peace Prize winner) |
| MSG | Militärisches Scharfschützen Gewehr (Heckler and Koch sniper rifle) |
| MSG | metastasis suppressor gene |
| MSG | Multi-sectoral Group (Trinidad & Tobago) |
| MSG | Ministry of the Solicitor General (Canada) |
| MSG | Mortgage Specialist Group |
| MSG | Merchant Service Guild (union) |
| MSG | Michigan Society of Gerontology |
| MSG | Money Savvy Generation |
| MSG | Material Systems Group |
| MSG | Microsoft Solutions Group |
| MSG | Magnum Snow Goose (Haydel game call) |
| MSG | Mechanical stress grading |
| MSG | Military Systems Group, Inc. (Nashville, TN) |
| MSG | Molecular Systematics Group |
| MSG | Monash Sun Grid (Monash University, Australia) |
| MSG | McMurry Student Government (McMurry University, Abilene, TX) |
| MSG | Microfused Silicon Strain Gauge |
| MSG | Methacrylates Sector Group (petrochemistry) |
| MSG | Macintosh Support Group (New Zealand) |
| MSG | Multispeciality Group (US Healthcare industry) |
| MSG | Miami Style Graffiti |
| MSG | Marine Studies Group (Geological Society, UK) |
| MSG | McKibbin Software Group Pty Ltd (Australia) |
| MSG | Manufacturers' Standard Gauge (steel) |
| MSG | Microwave Signal Generator |
| MSG | Makerere Students Guild (Kenya) |
| MSG | Mexican Society of Geomorphology |
| MSG | Maine State Grange (Augusta, Maine) |
| MSG | Monash Small Grants (Monash University, Australia) |
| MSG | Modular Steam Generator |
| MSG | maximum security gate |
| MSG | Massachusetts State Guard |
| MSG | My Summer Guy |
| MSG | Mooring Selection Guide |
| MSG | Manpower Scaling Guide (US DoD) |
| MSG | Metal Strip Grating |
| MSG | Multifunctional Secure Gateway |
| MSG | Memorial Society of Georgia (Atlanta, GA) |
| MSG | Marxist Study Group |
| MSG | Manawatu Speleo Group (caving hut in NZ) |
| MSG | Materials Science Glovebox |
| MSG | Microelectronics Systems Group |
| MSG | Michael Samuel Graphics (New York, NY) |
| MSG | MIP Steering Group (Multilateral Interoperability Programme) |
| MSG | Minimum Subscriber Guarantee |
| MSG | Macromolecular Studies Group |
| MSG | Manpower Sub-Group (now Manpower Focus Group) |
| MSG | EZ Metro Manila Street Guide (Philippines) |
| MSG | Media Service Gaens (Germany) |
| MSG | Megasonic Generators (Modutek Corporation) |
| MSG | Maintenance Support Guide Status |
| MSG | Maintenance Strategy Group |
| MSG | Ministry Strategy Group (Anglican Church) |
| MSG | Multi-Source Group |
| MSG | Master of Science in Geography |
| MSG | Modular Shelter, Underground |
| MSG | Men Seeking God |
| MSG | Maryland Space Grant |