| Acronyms | Meaning / Significance |
Source |
| M | Military | |
| M&C | management and control | |
| M&E | mechanical and electrical | |
| MAB | maritime amphibious brigade | |
| MAC | mandatory access control | |
| MAC | medium access control | |
| MAC | message authentication code | |
| MACA | Meritime Air Control Authority | |
| MACS | Monitor, Alarm and Control System | |
| MADAP | Maastricht Automatic Data Processing and Display System | |
| MAG | main armament group | |
| MAGAD | MNCs Advisory Group on Air Defence | |
| MAGOIM | MNC Advisory Group on Identification Matters | |
| MAN | Metropolitan Area Network | |
| MANDATE | MCCIS austere NORTHWOOD database and terminal equipment | |
| MANPADS | Man Portable AD System | |
| MAOC | maritime air operations centre | |
| MAOC | Modular Air Operation Center | |
| MAP | Manufacturing Automation Protocols | |
| MAP | maritime air patrol | |
| MAPPER | maintaining, preparing and producing executive reports | |
| MARCLIP | Maritime Commanders' Long Term Infrastructure Plan (3x6 years) | |
| MAREQ | military assistance requirement | |
| MART | mean active repair time | |
| MAS | Military Agency for Standardization | |
| MASE | Message Administration Service Element | |
| MASLO | maritime aviation support to land operarions | |
| MASSTIC | Maritime ACCS Ship and Shore Tactical Interface Component | |
| MATELO | maritime air telecommunications organization | |
| MAU | Medium Attachment Unit | |
| MAWHQ | mobile alternate war headqurter | |
| MAWHQ | Mobile Alternate War HQ | |
| MB | Military Budget | |
| MBC | military budget committee | |
| MBDL | Missile Battery Data Link | |
| MBS | military base standard | NACISA USD 23.01.00(93)01 |
| MBS | Military Base Standards | |
| MC | military committee | |
| MC | multiple category | |
| MCC | main control centre [at KESTER] | SATCOM |
| MCC | military control centre | |
| MCC | mobile communication centre | |
| MCC | Movement Control Center | |
| MCCAP | maritime CIS contingency assets pool | AC/317/SEC/94/25 |
| MCCIS | maritime command and control information system | |
| MCCS | Maritime Command and Control System | |
| MCDA | Multi-Criteria Decision Analysis | |
| MCDS | multi-channel data system | |
| MCE | Modular Control Equipment | |
| MCEWG | military comminication and electronic working group | |
| MCG | Maastricht Coordination Group | |
| MCM | Mobile Communication Module | |
| MCM | Mobile Communication Module | |
| MCMF | maritime conceptioal military framework | |
| MCR | military communications requirement | |
| MCS | military communications system | US tactical ADP CCIS |
| MCSC | main counter-measure support command vessel | |
| MCU | multi-point conference unit | CP 5A0008 |
| MCU | multi-site conference unit | VTC |
| MCWG | military committee working group | |
| MDC | message distribution centre | |
| MDF | main distribution frame | |
| MDP | MMHS Demonstrator Program | |
| MDR | medium data rate | |
| MDS | Modular Design of Systems | |
| MDSE | Message Delivery Service Element | |
| MED | machine encryption device | |
| MEDS | manipulative electronic deception | |
| MEDS | message entry and distribution system | |
| MEF | minimum essential facility | |
| MEL | major events list | |
| MERCS | merchant (ships under) control of shipping | |
| MERCS | MErchant ship Crypto System | |
| METCON | meteorological telecommunications system | |
| METOC | METeorological and OCeanographic | |
| MEWSG | multi-service EW support group | |
| MF | military function | |
| MFA | ministry of foreign affairs | |
| MFAS | maintain favorable air situation | |
| MHEG | multi- and hypermedia inform. coding experts group | |
| MHPS | message handling and processing system | |
| MHQ | Maritime Headquarters | |
| MHS | message handling system | |
| MI | Management Information | |
| MI | ministry of the interior | |
| MIA | maritime intelligence architecture | MIA study |
| MIAU | million IAU | |
| MICAM | Military Code Assignment Method | |
| MICS | Management Information Conformance Statement | |
| MIDLA | media independent data link architecture | |
| MIDS | Multifunctional Information Distribution System | |
| MIJI | meaconing, intrusion, jamming and interference | |
| MIL-STD | military standard | STC CSNI final report 22/9/95 |
| MILCONAC WG | military conventional arms control working group | |
| MILOS | Military Operations Support Software for Situation Display and Processing | |
| MILOS | Military Operations Support Software for Situation Display and Processing | |
| MILREP | Military Representative | |
| MILSTAM | ||
| MIME | multipurpose internet mail extensions | |
| MINERVA | NATO MIS | |
| MINET | movement information network | |
| MIPS | Management Information Protocol Specification | |
| MIPS | million of instructions per second | |
| MIS | Management Information Service | |
| MIS | management information system | NACISA USD 23.01.00(93)01 |
| MISD | Management Information Service Definition | |
| MISPEC | Merit of Individual System Performance Characteristics | |
| MISREP | mission report | |
| MISSI | multilevel information systems security initiative | AC/317-N/834 |
| MIU | Multiple Interface Unit | |
| MIW | mine warfare | |
| MJ | military justification | |
| MJLC | Ex Strong Resolve 95 | |
| MLPP | Multi-level Precedence and Pre-emption | |
| MLRS | multiple launch rocket system | |
| MLS | Manual Line Switch | |
| MLS | Multi Level Security | |
| MLSA | multi layer security architecture | AC/317-N/846 |
| MM | military message | NACISA/APD/04.07.00(95)001 |
| MM | Military Messaging | |
| MMCR | minimum military control requirement | |
| MMHS | military message handling system | NACISA USD 23.01.00(93)01 |
| MMI | Man - Machine Interface | |
| MMR | minimum military requirement | |
| MMS | Manufacturing Message Specification | |
| MMS | military message store | NACISA/APD/04.07.00(95)001 |
| MMT | mobile maintenance team | |
| MMT | multimedia message transfer | STC CSNI final report 22/9/95 |
| MMTS | military message transfer system | |
| MNC | major NATO command | |
| MNC | Major NATO Commander | |
| MNC | multinet controller | STC CSNI final report 22/9/95 |
| MND | mission need document | NACISA USD 23.01.00(93)01 |
| MND | multi-national division | |
| MNE | multinational exercise | |
| MNF | multi-national forces | |
| MNG | multi-net gateway | |
| MNMF | multi-national maritime forces | |
| MNSIM | multinational simulation | |
| MNTB | multinational test bed | CAX |
| MNTB-IG | MNTB implementation group | |
| MNTB-SDG | MNTB scenario development group | |
| MNTBEX | multinational testbed exercise | |
| MNWG | multinational working group | |
| MNWG/OES | MNWG on operational environment simulation | |
| MO | Managed Object | |
| MOA | memorandum of agreement | |
| MOA | Mission Oriented Approach | |
| MOAC | message origin authentication check | |
| MOB | main operating base | |
| MOB | Missile Order of Battle | |
| MOD | Ministry of Defence | |
| MODACOM | mobile data communication | |
| MOE | Measure of Effectiveness | |
| MOES | measures of effectiveness | STC CSNI final report 22/9/95 |
| MOIC | Military Oceanographic Information Centers | |
| MOP | Measure of Performance | |
| MOPS | Minimum Operational Performance Standard | |
| MOR | military operational requirement | |
| MOTIS | Message-Oriented Text-Interchange System | |
| MOTS | military off-the-shelf (software) | |
| MOU | memorandum of understanding | |
| MP | message processor | |
| MPA | maritime patrol aircraft | |
| MPC | message processing centre | |
| MPC | Movement Planning Conference | |
| MPCO | Multi-peer Communications | |
| MPEG | moving picture experts group | |
| MPF | message processing facility | |
| MPMS | Mission Planning and Monitoring system | |
| MPP | maritime power projection | |
| MPR | Medium Power Radar | |
| MPS | message processing system | |
| MRBM | medium range ballistic missile | |
| MRCCS | middle range communications control station | |
| MRD | main requirement document | |
| MRFL | master radio frquency list | ARFA data base |
| MRL | Maritime Rear Link | |
| MRO | military response option | |
| MRR | mobile radio relay | |
| MRRF | multi-national rapidly deployable reaction forces | |
| MRSE | Message Retieval Service Element | |
| MRT | Multi Radar Tracking | |
| MS | Message Store | |
| MS | meteor scatter | |
| MS | military staff | AC/317-N/798 |
| MS | military standard | |
| MS | Mobile Subsystem | |
| MSC | major subordinate command | Ex Strong Resolve 95 |
| MSCF | message supervisory control facility | |
| MSDMP | Mode S Data Multi Processor | |
| MSDP | MMHS security demonstrator programme | |
| MSE | mesure de soutien electronique | |
| MSE | mobile staff element | |
| MSF | message security filter | |
| MSGO | MNCs Steering Group on Operations | |
| MSGS | Message Generation System | |
| MSGT | mobile satellite ground terminal | |
| MSK | minimum shift keying | MDM / 200 Hz bw for 4 channels |
| MSL | Mean Sea Level | |
| MSL | multi-security level | E3/link encryption/bulk encryption/...) |
| MSN | Multiple Subscriber Number | |
| MSP | message security protocol | ACP 123 |
| MSP | Mode S Specific Protocol | |
| MSR | Main Supply Route | |
| MSS | message switching system | |
| MSS | mobile satellite service | AC/317-N/839 |
| MSSE | Message Submission Element | |
| MSSR | Monopuls SSR | |
| MST | medium speed terminal | |
| MST | Multi-Sensor Tracking | |
| MT | management tools | |
| MT | military task | |
| MTA | Message Transfer Agent | ITU-T Recommendation X.400 |
| MTBF | mean time between failures | |
| MTF | maritime tactical forces | |
| MTF | message text format | |
| MTFITS | MTF information tracking system | |
| MTFP | Medium Term Financial Plan | |
| MTFWG | message text format(ting) working group | |
| MTIP | medium term infrastructure plan | |
| MTP | Message Transfer Part | |
| MTRP | medium term resource plan | |
| MTS | Message Transfer System | |
| MTSE | Message Transfer Service Element | |
| MTTR | Mean Time to Repair/Replace | |
| MUA | military user agent | NACISA/APD/04.07.00(95)001 |
| MUB | mobile user box | |
| MV | military vigilance | |
| MWA | weekly minutes 6-12-95 | |
| MWCE | minor works project submission and cost estimate | |
| MWHQ | Mobile War Headquarter | |
| MWP | Minor Works Project | |
| MWS | Missile Warning System |