| MGB | Machine Gun Battalion 
| Others |
| MGB | Madiany Global Business
| Others |
| MGB | Main Gear Box
| Others |
| MGB | Making Grins Bigger
| Others |
| MGB | Manual Gearbox
| Others |
| MGB | Marital Grief Begins
| Others |
| MGB | Mass Group Buff
| Others |
| MGB | Master of Global Business
| Others |
| MGB | May God Bless
| Others |
| MGB | Mc Gowan Book Company
| Others |
| MGB | Medial Geniculate Body
| Others |
| MGB | Medical Genetics Bldg
| Others |
| MGB | Medium Girder Bridge
| Others |
| MGB | Metro Guard B
| Others |
| MGB | Microsoft Global Briefing
| Others |
| MGB | Might Go Backwards
| Others |
| MGB | Mines and Geosciences Bureau
| Others |
| MGB | Mini Gastric Bypass
| Others |
| MGB | Ministerstvo Gosudrstvennoi Bezopasnosti
| Others |
| MGB | Minor Groove Binder
| Others |
| MGB | Minor Groove Binding
| Others |
| MGB | Mobile Garbage Bin
| Others |
| MGB | Modern Gujarat Business
| Others |
| MGB | Molecular Genetics and Biochemistry
| Others |
| MGB | Molecular Genetics B
| Others |
| MGB | Molecular Genetics Branch
| Others |
| MGB | Morris Garages Type B
| Others |
| MGB | Motor Gun Boat
| Others |
| MGB | Motor GunBoat
| Others |
| MGB | Mount Gambier, South Australia, Australia
| Others |
| MGB | Multifunctional Gate Box
| Others |
| MGB | My Gorgeous Barb
| Others |