| Abbreviation | Definition |
|---|---|
| MDDQ | Maximum Daily Delivery Quantity |
| MDF | Medium Density Fiberboard |
| MDF | Medium Density Fibreboard |
| MDF | Medium Diffusion Film |
| MDL | Multiple Distribution Line |
| MDM | Metal Disintegration Machine |
| MDO | Marine Diesel Oil |
| MDO | Medium Density Overlay |
| MDO | Multidisciplinary Design Optimization |
| MDQ | Maximum Display Quantity |
| MDRQ | Maximum Daily Receipt Quantity |
| MDS | Material Data Sheet |
| MDSO | Multi Disciplined Security Officer |
| ME | Mercedes Engine |
| ME | Windows Millennium Edition |
| MEBAC | Metal Bonded Anti-Slip Coating (safety product) |
| MEC | Mobile Entertainment Center |
| MECB | Metal Enclosed Capacitor Banks |
| MEL | Most Efficient Level |
| MEPF | Medical Electronic Payment Financing |