| Abbreviation | Definition |
|---|---|
| MW | Medium Wave |
| MWA | Minnesota Wireless Association |
| MX | MultipleX |
| NARC | Nashua Area Radio Club |
| NARC | Northland Antique Radio Club |
| NARL | Namibia Amateur Radio League |
| NARL | Namibian Amateur Radio League |
| NARL | Newington Amateur Radio League |
| NCI | Net Control Information |
| NCS | Net Control Station |
| ND | Non-Directional |
| NDDM | Non-linear Digital Delta Modulation |
| NEARCOM | New England Amateur Radio COMmunication |
| NEC | Numerical Electromagnetics Code |
| NERG | North East Radio Group |
| NERT | New Era Repeater Technocrats |
| NERW | NorthEast Radio Watch |
| NH | Natural Harmonic |
| NM | Not Modulated |
| NPL | Normal Power Level |