MGB
- Game Boy
- MG MGB
- Magandang Gabi... Bayan
- Mahagathbandhan (Bihar)
- Mahagathbandhan (Jharkhand)
- Mahagathbandhan (Uttar Pradesh)
- Mass General Brigham
- Mathematical Grammar School
- Matterhorn Gotthard Bahn
- Matthew Good Band
- Medial geniculate nucleus
- Medium Girder Bridge
- Mines and Geosciences Bureau
- Ministry of State Security (Soviet Union)
- Motor gunboat
- Mount Gambier Airport