| Abbreviation | Definition |
|---|---|
| MPS | Mailing Preference Service |
| MPSK | Multi-Phase Shift keying |
| MPTS | Multi Protocol Transport Service |
| MPVC | Multi-Party Video Conferencing |
| MQ | Message Queuing |
| MQC | Multi-protocol QOS (Quality Of Service) Commands |
| MQI | Message Queuing Interface |
| MQM | Multinet Quality Monitor |
| MQTh | Mean Qualified Throughput |
| MRA | Multiple Recipient Address |
| MRBTS | Multi Radio Base Transceiver Station |
| MRCC | Multi-Rate Congestion Control (web multicast transmission protocol) |
| MREN | Multiple Rate Ethernet Network |
| MRS | Message Routing System |
| MRSE | Message Retrieval Service Element |
| MRSM | Multicast Routing State Monitor |
| MRSP | Multicast Router Switch Protocol |
| MRT | Mail Relay Test |
| MRWAN | Managed Router WAN |
| MS | Master-Slave |