| 略語 | フルスペル |
|---|---|
| M2M | Machine to Machine |
| MaaS | Mobility as a Service |
| MAC | Mandatory Access Control |
| MAC | Message Authentication Code |
| MAC（アドレス） | Media Access Control |
| MD5 | Message Digest 5 |
| MDA | Mail Delivery Agent |
| MDM | Mobile Device Management |
| MIDI | Musical Instrument Digital Interface |
| MIME | Multipurpose Internet Mail Extensions |
| MIPS | Million Instruction Per Second |
| MITB攻撃 | Man In The Browser |
| MITM攻撃 | Man In The Middle |
| MOT | Management Of Technology |
| MPEG | Moving Picture Experts Group |
| MR | Mixed Raality |
| MRA | Mail Retrieval Agent |
| MRP | Material Requirements Planning |
| MTA | Mail Transfer Agent |
| MTBF | Mean Time Between Failure |
| MTTR | Mean Time To Repair |
| MUA | Mail User Agent |
| MVNO | Mobile Virtual Network Operator |