| Abbreviation | Definition |
|---|---|
| MA | Mechanical Advantage |
| mA | MilliAmpere |
| MAC | Macintosh |
| MAC | Maximum Allowable Concentration |
| MAC | Medium Access Control |
| MAC | Multiplexed Analogue Components |
| MAC | Multiply and Accumulate |
| MAC | Multiply-Accumulate |
| MACT | Maximum Achievable Control Technology |
| MAD | Microsoft Active Directory |
| MAEI | Malaysian American Electronics Industry |
| MAF | MAFia |
| MAGIC | Mondial Antenna Ground Isolation Circuit |
| MAH | MilliAmp Hours |
| Make | form A (normally open) contacts |
| MALDI | Matrix-Assisted Laser Desorption and Ionization |
| MAM | Milli-AmMeter |
| MAN | Metropolitan Area Network |
| MAP | Manufacturing Automation Protocol |
| MAS | Micro-Architecture Specification |