| Acronym | Sense | Language | Topics |
|---|---|---|---|
| MMS | Multimedia Messaging Service | In English | |
| MMSC | Multimedia Messaging Service Center | In English | |
| MO-MED | Mobile Information Engineering & E-Med Systems | In English | → Medicine |
| MOPS | Military Operation Phone System | In English | → Military engineering |
| MPT | Ministry of Posts and Telecommunications | In English | → Organizations and associations → Transport and postal services |
| MR | Magyar Rádió | In Hungarian | → Hungary |
| MRBT | Maintenance Réseaux-Bureautique-Télématique | In French | → Computer science |
| MRT | Macedonian Radio-Television (www.mkrtv.com.mk) = МРТ | Македонска радио-телевизија | In Macedonian = KVV | Kevarzhe Vannielouriezh Vreizh | In Breton = SBV | Société Bretonne de Vexillologie | In French |
In English | |
| MS | Mobile Station | In English | |
| MSC | Mobile Service Switching Center | In English | |
| MSG | Mobile Standards Group | In English | → Standardization |
| MSISDN | Mobile Station ISDN Number | In English | |
| MSM | Multi-Services Minitel | In French | |
| MSN | Microsoft Network | In Dutch | → Networks, communication |
| MSRN | Mobile Station Roaming Number | In English | |
| MT | Mobile Terminal | In English | |
| MTA | Multimedia Terminals & Applications | In English | |
| MTAN | Mobile Transaction Authentication Number | In English | |
| mTLD | mobile Top Level Domain | In English | → Networks, communication |
| MTS | Mobile Telephone Service | In English | |
| MUSIC | Multiple Signal Classification | In English | → Networks, communication |
| MVNO | Mobile Virtual Network Operator | In English | |
| MWC | Mobile World Congress | In English | → Congresses |
| MWI | Mobile Web Initiative (www.w3.org/Mobile/) | In English | → Internet |
| NAATA | National Asian American Telecommunications Association | In English | → Associations |
| NABA | North American Broadcasters Association (www.nabanet.com) | In English | → Associations |
| NARAFI | Nationaal Radio- en Filmtechnisch Instituut | In Dutch | → Organizations and associations → Cinema, movies |
| NASCOM | NASA Communications | In English | → Astronautics → United States |
| NB | Narrow Band | In English | |
| NBA | Narrow-Band Amplifier | In English | |
| NBMA | Nonbroadcast Multiple Access Network | In English | → Networks, communication |
| NCC | NASA Communications Control | In English | → Astronautics → United States |
| NCRV | Nederlandse Christelijke Radio-Vereniging | In Dutch | → Organizations and associations → Christianity → Netherlands |
| NDEF | NFC Data Exchange Format | In English | → Software |
| NDGPS | Nationwide Differential Global Positioning System | In English | → Geodesy, cartography → Astronautics |
| NDR | Norddeutscher Rundfunk (www.ndr.de) | In German | → Germany |
| NET | Norme Européenne de Télécommunication(s) | In English | → Standardization |
| NETCOM | Network Communications | In English | |
| NEXT | Near End CrossTalk | In English | |
| NFCIP-1 | Near Field Communication Interface and Protocol-1 | In English | → Software |
| NGFAW | Nachrichtentechnische Gesellschaft Fachtagung über Antennen | In German | → Serial publications, periodicals |
| NGN | Next Generation Networking | In English | |
| NIR | (Belgisch) Nationaal Instituut voor Radio-Omroep | In Dutch | → Belgium |
| NITZ | Network Identity Time Zone | In English | |
| NOA | National Outsourcing Association | In English | → Associations |
| NOS | Nederlandse Omroep Stichting (www.nos.nl) | In Dutch | → Foundations → Netherlands |
| NPO | Nederlandse Publieke Omroep (www.omroep.nl) | In Dutch | → Netherlands |
| NPSS | NASA Packet Switching System | In English | → Astronautics |
| NRA | Nœud de Raccordement Abonné | In French | |
| NRI | National Radio Institute-McGraw Hill Continuing Education Center | In English | → Specialized or polytechnical colleges → United States |
| NRK | Norsk Rikskringkasting (www.nrk.no) | In Norwegian | → Norway |
| NRN | National Radio Network | In English | |
| NRU | Natsionalna Radiokompanya Ukraïny | In Ukrainian | |
| NTA | National Telecom Agency | In English | |
| NTA | National Television Awards | In English | |
| NTSC | National Television Standards Committee | In English | → Organizations and associations |
| NTT | Nippon Telegraph and Telephone (www.ntt.co.jp) | In English | → Japan |
| NTU | Natsionalna Telekompaniya Ukraïny (www.ntu.com.ua) = UNCITRAL | United Nations Commission on International Trade Law | In English = CNUDCI | Commission des Nations Unies pour le Droit Commercial International | In French = ЮНСИТРАЛ | Комиссия Организации Объединенных Наций по праву международной торговли | In Russian = CNUDMI | Comisión de las Naciones Unidas para el Derecho Mercantil Internacional | In Spanish = НТУ | Національна Телекомпанія України | In Ukrainian |
In Ukrainian | |
| NUCT | Nuova Università del Cinema e della Televisione (www.nuct.com) | In Italian | → Higher education, universities → Cinema, movies |
| OBNT | Ordre de Base National des Transmissions | In French | → Firefighting |
| OCCARO | Orange County Council of Amateur Radio Organizations | In English | → Organizations and associations |
| OCDU | Optical Channel Drop Unit | In English | → Optics |
| OCRACES | Orange County Radio Amateur Civil Emergency Service | In English | |
| OCT | Ordre Complémentaire de Transmission | In French | |
| OCT | Ordre Complémentaire pour les Transmissions | In French | → Military affairs |
| OFDM | Orthogonal Frequency Division Multiplexing | In English | → Networks, communication |
| OFDM | Orthogonal Frequency-Division Multiplexing | In English | → Computer science |
| ÖIAT | Österreichisches Institut für angewandte Telekommunikation (www.oiat.at) | In German | → Research institutes → Austria |
| OIS | Operational Intercommunication System | In English | |
| OLT | Optical Line Terminal | In English | |
| OMCS | Operations and Maintenance Communications System | In English | → Maintenance and logistics |
| OMT | Organe de Manœuvre Télécommandé | In French | → Mechanical engineering |
| ONT | Optical Network Terminal | In English | → Networks, communication |
| OPPTIC | Organisation de Professionnels pour la Promotion des TIC en région Languedoc-Roussillon | In French | → Networks, communication → Organizations and associations |
| OPSIS | Observation et Prospective sur la Société de l'Information et ses Services | In French | → Computer science |
| OptCo | Optics Communications | In English | → Serial publications, periodicals → Optics |
| OptFT | Optical Fiber Technology | In English | → Serial publications, periodicals → Optics |
| ORF | Österreichischer Rundfunk (http://orf.at) | In German | → Austria |
| ORS | Österreichische Rundfunksender (www.ors.at) | In German | → Austria |
| ORTA | Organisme de Ràdio i Televisió d'Andorra | In Catalan | → Andorra |
| ORTAS | Organisme de la Radio-Télévision Arabe Syrienne | In French | |
| OSCAR | Orbiting Satellite Carrying Amateur Radio | In English | → Astronautics |
| OSIRIS | Observatoire des Systèmes d'Informations, des Réseaux et des Inforoutes au Sénégal (www.osiris.sn) | In French | → Organizations and associations → Software → Networks, communication |
| OT | Ohjelmistotekniikka = IT | Information Technology | In English = IT | Informationstechnik | In German = IT | Inligtingstegnologie | In Afrikaans = TI | Tecnologia da Informação | In Portuguese = TI | Tecnoloxías da información | In Galician = UT | Upplýsingatækni | In Icelandic = IT | Informationsteknik | In Swedish = IT | Informacijska Tehnologija | In Slovenian = IT | Informačné Technológie | In Slovak = ІТ | Інформаційні технології | In Ukrainian = ИТ | Информационные технологии | In Russian = IT | Informa Teknologio | In Esperanto = TI | Tecnologías de la Información | In Spanish = IT | Informacinės Technologijos | In Lithuanian = IT | Informācijas Tehnoloģijas | In Latvian |
In Finnish | → Computer science |
| OTV | Operational Television | In English | |
| OVCO | Operational Voice Communication Office | In English | |
| ÖVSV | Österreichischer Versuchssenderverband | In German | → Organizations and associations → Austria |
| OWF | Optimum Working Frequency | In English | |
| OXCs | Optical cross connects | In English | |
| P&T | Post en Telegraaf | In Dutch | → Transport and postal services |
| PAGCH | Packet Access Grant Channel | In English | |
| PAL | Phase Alternated Line | In English | |
| PAMPAS | Pioneering Advanced Mobile Privacy and Security (www.pampas.eu.org) | In English | → Computer-based techniques |
| PASTI | Public Address Speech Transmission Index | In English | → Acoustical engineering |
| PATRACDR | Personnel, Armement, Tenue, Radio, Alimentation, Commandement, Déroulement, Rendez-vous | In French | → Firefighting |
| PB | Point de Branchement | In French | |
| PBB | Provider Backbone Bridge | In English | → Networks, communication |
| PBB-TE | Provider Backbone Bridge - Traffic Engineering | In English | → Networks, communication |
| PBBN | Provider Backbone Bridge Network | In English | → Networks, communication |
| PBEB | Provider Backbone Edge Bridge | In English | → Networks, communication |
| PBS | Public Broadcasting Service | In English | |
| PBT | Provider Backbone Transport | In English | → Networks, communication |
| PBX | Private Branch Exchange | In English | |
| PCAM | Poste de Commandement pour Appels Multiples | In French | |
| PCI | Peripheral Component Interconnect | In English | → Computer hardware |
| PCMR | Probability of Correct Message Receipt | In English | |
| PCTC | Pentagon Consolidated Telecommunications Center | In English | → Military affairs |
| PDA | Personal Digital Assistant | In English | → Computer science |
| PDH | Plesiochronous Digital Hierarchy | In English | → Networks, communication |
| PDZ | Point de Distribution de Zone | In French | |
| PET | Persona-Enabling Toolkit | In English | → Networks, communication |
| PFM | Pulse Frequency Modulation | In English | |
| PFN | Pulse Forming Network | In English | |
| PG | Parental Guidance | In English | → Cinema, movies |
| PHB | Per Hop Behavior | In English | → Networks, communication |
| PICS | Protocol Implementation Conformance Statement | In English | → Standardization → Networks, communication |
| PIM | Portail Intranet Mobile | In French | → Networks, communication |
| PIN | Personal Identification Number | In English | |
| PIN | Persoonlijk Identificatienummer | In Dutch | → Computer science |
| PL | Private Line | In English | |
| PLC | Power Line Communication | In English | → Electrical engineering |
| PLMN | Public Land Mobile Network | In English | |
| PLT | Powerline Telecommunications | In English | |
| PM | Phase Modulation | In English | |
| PME | Personal Mobile Radio | In English | |
| PMN | Private Mobile Networks | In English | |
| POTS | Plain Old Telephone Service | In English | |
| PPCH | Packet Paging Channel | In English | |
| PPLMN | Periodic Public Land Mobile Network | In English | |
| PRACH | Packet Random Access Channel | In English | |
| PRF | Pulse Repetition Frequency | In English | |
| PRI | Point de Raccordement Immeuble | In French | |
| PRI | Primary Rate Interface | In English | |
| PRINCE | PRojet d'INfrastructure de Communication d'Entreprise | In French | → Networks, communication |
| PRISM | Pacific Regional Information SysteM | In English | → Computer science |
| PRR | Pulse Repetition Rate | In English | |
| PSCN | Program Support Communications Network | In English | → Networks, communication |
| PSDU | Power and Signal Distribution Unit | In English | → Energy economics → Electrical engineering |
| PSIU | Power and Signal Interface Unit | In English | → Energy economics → Electrical engineering |
| PSK | Phase-Shift Keying | In English | |
| PSP | Programmable Signal Processor | In English | → Software |
| PSTN | Public Switched Telephone Network = RTCP | Réseau Téléphonique Commuté Public | In French = ТСОП | елефонная сеть общего пользования | In Russian |
In English | |
| PT | Post- og Teletilsynet | In Norwegian | → Transport and postal services |
| PTC | Радио-телевизија Србије (www.rts.co.yu) = RTS | Radio Televizija Srbije | In Serbian |
In Serbian | |
| PTCR | Pad Terminal Connection Room | In English | |
| PTN | Publika telefonnätet | In Swedish | |
| PTS | Per-Trunk Signaling | In English | |
| PTT | Poŝto, Telegrafo kaj Telefono | In Esperanto | → Transport and postal services |
| PTT | Post Telegraaf Telefoon | In Dutch | → Transport and postal services |
| PVC | Permanent Virtual Circuit | In English | |
| QAM | Quadrature Amplitude Modulation | In English | |
| QPSK | Quadrature Phase-shift keying | In English | |
| R&CC | Recorder and Communication Control | In English | |
| R&T | Réseaux & Télécoms | In French | → Networks, communication |
| RAAP | Red Académica Peruana | In Spanish | → Computer science → Higher education, universities |
| RABF | Radio Astronomy Bandstop Filter | In English | → Astronomy |
| RACC | Radio Advertising Clearance Centre | In English | → 659 |
| RACES | Radio Amateur Civil Emergency Service | In English | |
| RACH | Random Access Channel | In English | |
| RADAR | RAdio Detection And Ranging | In English | |
| RADIUS | Remote Authentication Dial In User Service | In English | → Networks, communication |
| RaEE | Radio and Electronic Engineer | In English | → Serial publications, periodicals → Electronics |
| RAGIE | Red Avanzada Guatemalteca para la Investigación y Educación | In Spanish | → Computer science → Education → Mathematics and natural sciences |
| RAI | Radio Audizioni Italiane (www.rai.it) | In Italian | → Italia |
| RAI | Radiotelevisione Italiana (www.rai.it) | In Italian | → Italia |
| RAICES | Red Avanzada de Investigación, Ciencia y Educación Salvadoreña | In Spanish | → Computer science → Education → Mathematics and natural sciences |
| RAISOM | Réseaux de collecte IP Sans Fil Optimisés | In French | → Networks, communication |
| RaRLJ | Radio Research Laboratories Journal | In English | → Serial publications, periodicals |
| RaRLR | Radio Research Laboratories Review | In English | → Serial publications, periodicals |
| RaSc | Radio Science | In English | → Serial publications, periodicals |
| RaScB | Radio Science Bulletin | In English | → Serial publications, periodicals |
| RaScS | Radio Science Supplement | In English | → Serial publications, periodicals |
| RAU | Red Académica Uruguaya | In Spanish | → Computer science → Higher education, universities |
| RBB | Rundfunk Berlin-Brandenburg | In German | |
| RCA | Radio Corporation of America | In English | → United States |
| RCCP | Recorder and Communications Control Panel | In English | |
| RCDD | Registered Communications Distribution Designer | In English | |
| RCF | Radios Chrétiennes en France | In French | → Organizations and associations → Christianity → France |
| RCN | Rockwell Communication Network | In English | |
| RCSO-TIC | Réseau de Compétences de Suisse Occidentale en Technologie de l'Information et de la Communication | In French | → Computer science → Switzerland |
| RDF | Radio Direction Finding | In English | |
| RDF | Radio Direction Finder | In English | |
| RDO | Radio Dom Ostankino | In Russian | |
| RDS | Radio Data Systeem | In English | |
| RDS-TMC | Radio Data System - Traffic Message Channel | In English | → Transport and postal services |
| REACCIUN | Red Académica de Centros de Investigación y Universidades Nacionales | In Spanish | → Computer science → Education |
| RedCYT | Red Científica y Tecnológica | In Spanish | → Computer science → Mathematics and natural sciences → Applied sciences, technology |
| REEP | Radio Engineering and Electronic Physics | In English | → Serial publications, periodicals → Electronics |
| REKAM | (Stichting) Regionale Kabeltelevisie Midden-Holland (www.rekam.nl) | In Dutch | → Foundations → Netherlands |
| RENATA | Red Nacional Académica de Tecnología Avanzada | In Spanish | → Computer science |
| RENIA | Red Nicaragüense de Internet Avanzada | In Spanish | → Computer science → Internet |
| RETINA | Red TeleInformática Académica | In Spanish | → Computer science |
| REUNA | Red Universitaria Nacional | In Spanish | → Computer science → Higher education, universities |
| RF | Radio Frequency | In English | |
| RFDA | Radio Frequency Deployed Assembly | In English | |
| RFDU | Radio Frequency and Digital Unit | In English | → Computer science |
| RFI | Radio France International (www.rfi.fr) | In French | → France |
| RFI | Radio Frequency Interference | In English | → Electronics |
| RFID | Radio Frequency Identification | In English | → Computer science |
| RFTK | Radio Frequency Tracking | In English |