| Abbreviation | Definition |
|---|---|
| MVPN | Mobile virtual private network |
| MWI | MINISIS Web Interface |
| MWN | Master Web Network |
| MWS | Modular Wiring System |
| MWT | MidWest Telnet |
| MWVPN | Mobile Wireless Virtual Private Network |
| MX | Mail Exchange |
| MX | Maintenance |
| MXDR | Mixed Dynamic Routing |
| MYS | Manage Your Server |
| MZAP | Multicast-Scope Zone Announcement Protocol |
| N | Nsfnet |
| NA | Network Address |
| NA | Network Annihilation |
| NA | Node Access |
| NAAS | Networking as a Service |
| NAC | Network Access Code |
| NAC | Network Admission Control |
| NACOSA | Networking AIDS Community Of South Africa |
| NACS | Netware Asynchronous Communication Services |