| Abbreviation | Definition |
|---|---|
| MGP | Mason, Griffin, & Pierson, P.C. |
| MGPL | Matrix Global PVT, LTD. |
| MGPL | Mikronix Gauges PVT, LTD. |
| MGRC | Mc Grath Rent Corp |
| MGS | Mad Gecko Studios |
| MGS | Martin G. Scheufler Kunstharzprodukte, GmbH |
| MGS | Max-Gain Systems, Inc. |
| MGT | Max Gaming Technologies |
| MGTC | Midwestern Gas Transmission Company |
| MGU | Managing General Underwriter |
| MGU | Mensch Gesellschaft Umwelt |
| MGV | Market Group Ventures |
| MGV | Mental Groove Video |
| MGV | Monarch Grand Vacations |
| MGW | MeGaWheels.com |
| MGX | Mega-Vox |
| MH | Malaysia Airlines |
| MH | Music House |
| MHA | Macdonald Harris & Associates |
| MHAD | Market High Advertising Ltd |