| Abbreviation | Definition |
|---|---|
| MACOS | Macintosh Operating System |
| MAD | Magnetic Audio Device |
| MAD | MPEG (Motion Picture Experts Group) Audio Decoder |
| MAF | Maintenance Activation File |
| MAGIC | Manual And Gaze Input Cascaded |
| MAHD | Modified Agile for Hardware Development |
| MAM | Maintenance Assist Module |
| MAM | Memory Acceleration Mode |
| MAMS | Media Asset Management System |
| MAN | Metropolitan Area Network |
| MANIAC | Mathematical Analyzer Numerical Integrator And Computer |
| MAPD | Marine Analog Power Display |
| MAPP | Matrix Array Picture Processor |
| MAR | Modified Aspect Ratio |
| MAT | Match/cyber |
| MAU | Medium Attachment Unit |
| MB | Mother Board |
| MB | Mouse Button |
| MBC | Manual Boost Control |
| MBC | Memory Bank Controller |