• MgS, the molecular formula for magnesium sulfide

In gaming:

• Metal Gear Solid, a video game
• Microsoft Game Studios, a video game publisher

In schools:

• Maidstone Grammar School, Kent, England
• Manchester Grammar School, England
• Melbourne Grammar School, Australia
• Methodist Girls' School, Singapore
• Middleton Grange School, New Zealand

In other uses:

• Mars Global Surveyor, an American spacecraft launched in 1996
• Modelling of General Systems, a domain-specific language for biological systems

See also

• MG (disambiguation)