| Abbreviation | Definition |
|---|---|
| MDTA | Modern Defensive Tactics Australia |
| MDTI | Midwest Diversified Technologies Inc |
| MDU | Montana Dakota Utilities |
| ME | Memory Express (Company) |
| MEA | Maryland Energy Administration |
| MEA | Matanuska Electric Association |
| MEA | Middle East Airlines |
| MEAA | McCulloch England Associates Architects |
| MEAA | Mental Entertainers Association Austria |
| MEAA | Mitsubishi Electric Automotive America, Inc. |
| MEAC | Magical Experiences Arts Company |
| MEAL | Media Expenditure Analysis Ltd |
| MEC | Malaysia Electric Corporation |
| MEC | Marianas Energy Corporation |
| MEC | Mayville Engineering Company |
| MEC | Mediterranean Exploration Company |
| MEC | Metro Exhibit Corporation |
| MEC | Mountain Equipment Co. |
| MEC | Mountain Equipment Company |
| MEC | Mountain Equipment Company Vietnam |