| Abbreviation | Definition |
|---|---|
| MGB | Mc Gowan Book Company |
| MGC | Maharishi Global Construction |
| MGC | Mentor Graphics Corporation |
| MGC | Model Gun Corporation |
| MGCI | M. G. Credit, Inc. |
| MGCL | Mari Gas Company Limited |
| MGCL | Martin Geomatic Consultants Ltd |
| MGDC | Martha Graham Dance Company |
| MGDC | Metropolitan Growth and Development Corp |
| MGE | Missouri Gas Energy |
| MGFL | Mukand Global Finance Ltd |
| MGG | My Green Gardens |
| MGGA | Microsoft Gamestop Google Apple |
| MGH | Matsubara Guest House |
| MGHI | Mount Grace Hospital Inc |
| MGHI | Mount Grace Hospitals Inc |
| MGHI | Mt Grace Hospital Inc |
| MGHS | Middle Georgia Hay Sales |
| MGI | Management Graphics, Inc. |
| MGI | Mouse Genome Informatics |