| JABS | Just Another Blog on Sports | In English | → Sport, physical exercises |
| JHSN | Journal of High Speed Networks | In English | → Serial publications, periodicals → Telecommunications |
| JMRP | Junk E-Mail Reporting Program | In English | |
| LAMP | Linux, Apache, MySQL, PHP | In English | → Software |
| LAN | Local Area Network | In English | → Telecommunications |
| LANES | LAN (Local Area Network) Extensible Simulator | In English | |
| LDAP | Lightweight Directory Access Protocol | In English | |
| LII | Librarians' Internet Index | In English | → Libraries |
| LONS | Local On-Line Network System | In English | |
| LPIC | Ligue de Protection des Internautes Câblés | In French | → Internet → Organizations and associations → Consumerism → Telecommunications |
| LVS | Linux Virtual Server | In English | → Operating systems |
| MAC | Media Access Control | In English | → Telecommunications |
| MARSOUIN | Môle Armoricain de Recherche sur la SOciété de l'Information et les Usages d 'Internet | In French | → Telecommunications |
| MBS/IP | Multi-purpose Business Security over Internet Protocol | In English | → Internet |
| MCH | Memory Controller Hub | In English | → Hardware |
| MDC | Mozilla Developer Center | In English | → Software |
| MEECN | Minimum Essential Emergency Communication Network | In English | → Telecommunications |
| MESCAL | Middleware Efficiently SCALable | In English | → Software |
| MIAM | Mathématiques Internet Aix Marseille | In French | → Mathematics |
| MIAU | Multiple Internet Agents for User-adaptive Decision | In English | → Telecommunications |
| MIME | Multipupose Internet Mail Extension | In English | |
| MIME | Multipurpose Internet Mail Extensions | In English | → Internet |
| MIME | Multipurpose Internet Mail Extensions | In English | → Internet |
| MINC | Multilingual Internet Names Consortium | In English | → Internet |
| MINW | Master Interface Network | In English | → Human-computer interaction |
| MMO | Massively Multiplayer Online | In English | → Software |
| MMT | Médecins Maîtres-Toile | In French | → Organizations and associations → Medicine |
| MOSS | Microsoft Office SharePoint Server | In English | → Knowledge management |
| MPLS | Multi Protocol Label Switching | In English | → Food technology |
| mTLD | mobile Top Level Domain | In English | → Telecommunications |
| MUSIC | Multiple Signal Classification | In English | → Telecommunications |
| NA | Network Aspects | In English | |
| NAD | Network Adapter Device | In English | → Hardware |
| NAS | Network Attached Storage | In English | → Knowledge management |
| NBMA | Nonbroadcast Multiple Access Network | In English | → Telecommunications |
| NCC | Network Control Center | In English | |
| NCIU | Network Common Interface Unit | In English | → Human-computer interaction |
| NCM | Network Connection Manager | In English | → Software |
| NCS | Network Control Station | In English | |
| NDS | Network Distribution Service | In English | |
| NES | Network Encryption System | In English | → Mathematics |
| NFS | Network File Server | In English | → Hardware |
| NIDS | Network Interface Data System | In English | → Human-computer interaction |
| NIP | Network Interface Processor | In English | → Hardware → Human-computer interaction |
| NIP | Network Input Processor | In English | → Hardware |
| NIU | Network Interface Unit | In English | → Human-computer interaction |
| NJP | Network Job Processing | In English | |
| NMF | Network Management Forum | In English | → Organizations and associations |
| NNTP | Network News Transport Protocol | In English | |
| NOM | Network Output Multiplexer | In English | |
| NOS | Network Operating System | In English | → Hardware |
| NREN | National Research and Education Network | In English | → Research policy → Education |
| NSI | NASA Science Internet | In English | → Internet → Spaceflight engineering, astronautics → Astronomy |
| NSP | Network Signal Processing | In English | → Hardware |
| NSP | Network Signal Processor | In English | → Hardware |
| NSS | Network Simulation System | In English | → Computer simulation |
| NUA | Network User Address | In English | |
| NVN | Netwerk van netwerken | In Dutch | |
| OASIS | Organisation for the Advancement of Structural Information Standard | In English | → Organizations and associations → Standardization → Data |
| OASIS | Objets Actifs, Sémantique, Internet et Sécurité | In French | → Semiotics |
| OCLC | Online Computer Library Center | In English | → Libraries |
| OFDM | Orthogonal Frequency Division Multiplexing | In English | → Telecommunications |
| ONT | Optical Network Terminal | In English | → Telecommunications |
| OntoUCP | Ontology based Unified Communication Protocol | In English | → Software |
| OPPTIC | Organisation de Professionnels pour la Promotion des TIC en région Languedoc-Roussillon | In French | → Organizations and associations → Telecommunications |
| ORB | Object Request Broker | In English | |
| OSPF | Open Shortest Path First | In English | → Internet |
| P2P | Peer-to-Peer | In English | |
| P3P | Platform for Privacy Preferences | In English | → Telecommunications |
| PAIR | Portal to Asian Internet Resources | In English | → Libraries |
| PBB | Provider Backbone Bridge | In English | → Telecommunications |
| PBB-TE | Provider Backbone Bridge - Traffic Engineering | In English | → Telecommunications |
| PBBN | Provider Backbone Bridge Network | In English | → Telecommunications |
| PBEB | Provider Backbone Edge Bridge | In English | → Telecommunications |
| PBS | Portable Batch System | In English | → Software |
| PBT | Provider Backbone Transport | In English | → Telecommunications |
| PCGI | Perl Common Gateway Interface | In English | → Programming languages |
| PDH | Plesiochronous Digital Hierarchy | In English | → Telecommunications |
| PDU | Protocol Data Unit | In English | |
| PET | Persona-Enabling Toolkit | In English | → Telecommunications |
| PHAROS | Platform for searcH of Audiovisual Resources across Online Spaces (www.pharos-audiovisual-search.eu) | In English | → Computer-based techniques |
| PHB | Per Hop Behavior | In English | → Telecommunications |
| PHP | PHP Hypertext Preprocessor | In English | → Programming languages |
| PHP | Personal Home Page | In English | → Programming languages |
| PICS | Platform for Internet Content Selection | In English | → Internet |
| PING | Packet Internet Gopher | In English | |
| POP | Post Office Protocol | In English | |
| PPP | Point-to-Point Protocol | In English | |
| PSCN | Program Support Communications Network | In English | → Telecommunications |
| PSDN | Packet Switched Data Network | In English | |
| PSWWWVL | Pacific Studies WWW Virtual Library | In English | → Internet → Libraries → Area studies |
| QES | Qwam E-content Server | In English | → Libraries |
| QIS | Qualcomm Internet Services | In English | → Internet |
| R@S | Réseau Associatif et Syndical | In French | |
| RARP | Reverse Address Resolution Protocol | In English | → Internet |
| RDA | Remote Data Access | In English | → Data |
| RDF | Resource Description Framework | In English | → Data |
| RENATER | Réseau National de Télécommunication pour la Technologie, l'Enseignement et la Recherche | In French | → Research policy → Education → Engineering, technology |
| REX | Remote Events for XML | In English | → Software |
| RIA | Rich Internet Application | In English | → Software |
| RIA | Rich Internet Applications | In English | → Software |
| RIAP | Rural Internet Access Point | In English | |
| RIC | Reta Informado-Centro | In Esperanto | → Libraries |
| RICC | Remote Intercomputer Communications | In English | → Telecommunications |
| RIP | Routing Information Protocol | In English | |
| RMI | Remote Method Invocation | In English | |
| RNRE | Réseau National de Recherche et d'Éducation | In French | → Research policy → Education |
| RSCS | Remote Spooling and Communication Subsystem | In English | → Software |
| RSN | Robust Security Network | In English | → Telecommunications |
| RSS | RDF Site Summary | In English | |
| RSS | Really Simple Syndication | In English | |
| RSTP | Rapid Spanning Tree Protocol | In English | → Telecommunications |
| RSU | Remote Service Unit | In English | |
| RTM | Réseaux, Télécoms et Multimedia | In French | → Document processing → Telecommunications |
| RTT | Round Trip Time | In English | |
| RVA | Réseaux à Valeur Ajoutée | In French | |
| SaaS | Software as a Service | In English | → Software |
| SARAI | South Asia Resource Access on the Internet | In English | → Libraries → Area studies |
| SASL | Simple Authentication and Security Layer | In English | |
| SAVANT | Synchronised and scalable Audio Video content Across NeTworks | In English | → Computer-based techniques → Telecommunications → Music |
| SCS | Solutions Communicantes Sécurisées | In French | → Software → Telecommunications |
| SCTP | Stream Control Transmission Protocol | In English | → Internet |
| SDNS | Secure Data Network System | In English | → Data |
| SEMA | Search Engine Marketing Association | In French | → Associations → Internet → 659 |
| SEMPO | Search Engine Marketing Professional Organization | In English | → Organizations and associations → Internet |
| SEO | Search Engine Optimization | In English | → Internet → 659 |
| SERPs | Search Engine Ranking Pages | In English | → Internet → Computer-based techniques |
| SET | Secure Electronic Transaction | In English | → Telecommunications |
| SGC | Server Gated Cryptography | In English | → Internet → Mathematics |
| SHOE | Simple Hypertext Ontology Extensions | In English | → Linguistics |
| SIN | Support Information Network | In English | → Knowledge management |
| SIO | System Internetowy Olimpiady | In Polish | |
| SIOgim | System Internetowy Olimpiady Gimnazjalistów | In Polish | → Computer science |
| SIP | Session Initiation Protocol | In English | → Telecommunications |
| SLIP | Serial Line Internet Protocol | In English | |
| SMIG | Southern Minnesota Internet Group | In English | → Organizations and associations |
| SMTP | Simple Mail Transfer Protocol | In English | |
| SNA | System Network Architecture | In English | |
| SNMP | Simple Network Management Protocol | In English | → Internet |
| SOAP | Simple Object Access Protocol | In English | |
| SPAN | Services and Protocols for Advanced Networks | In English | → Telecommunications |
| SPARQL | SPARQL Protocol And RDF Query Language | In English | → Data |
| SPDIF | Sony-Philips Data Interchange Format | In English | → Telecommunications |
| SRI | Syndicat des Régies Internet | In French | → Organizations and associations → 659 |
| SRSCC | Simulated Remote Station Control Console | In English | → Human-computer interaction |
| SSH | Secure Shell | In English | |
| SSI | Server Side Includes | In English | |
| SSL | Secure Sockets Layers | In English | |
| SSL | Secure Socket Layer | In English | |
| SSO | Single Sign On | In English | |
| STDN | Spacecraft Tracking and Data Network | In English | → Data → Spaceflight engineering, astronautics |
| sTN | Stichting Telecom- en internetgebruikers Nederland | In Dutch | → Foundations → Telecommunications |
| SUN | Stanford University Network | In French | |
| SWAD | Semantic Web Advanced Development | In English | → Internet → Computer-based techniques → Semiotics |
| SWD | Solliès Web Design | In English | → Internet |
| SWD | Semantic Web Deployment | In English | → Linguistics |
| SWSF | Semantic Web Science Foundation | In English | → Foundations → Software → Language, linguistics, literature |
| SWSW | Semantic Web Services Week | In English | → Internet → Computer-based techniques → Semiotics |
| TAVERNS | Test And Verification Environment for Remotely Networked Systems | In English | |
| TCP | Transmission Control Protocol | In English | → Internet |
| TCP/IP | Transmission Control Protocol/Internet Protocol | In English | → Internet |
| TES | Transactions Électroniques Sécurisées | In French | → Electronics → Telecommunications |
| TID | Telefónica Investigación y Desarrollo | In Spanish | → Telecommunications |
| TLD | Top Level Domain | In English | → Telecommunications |
| TLS | Transport Layer Security | In English | |
| TNS | Transaction Network Services (www.tnsi.com) | In English | → Telecommunications |
| TOS | Type Of Service | In English | |
| TTCN | Tree and Tabular Combined Notation | In English | → Programming languages |
| TTT | Tut-Tera Teksaĵo = WWW | World Wide Web | In English |
In Esperanto | → Internet |
| UCE | Unsolicited Commercial Email | In English | → Telecommunications |
| UDDI | Universal Description Discovery and Integration | In English | → Telecommunications |
| UDP | User Datagram Protocol | In English | |
| UDWDM | Ultra Dense Wavelength Division Multiplexing | In English | → Telecommunications |
| UGC | User Generated Content | In English | → Computer-based techniques |
| UNE | Unbundled Network Elements | In English | → Telecommunications |
| URI | Uniform Resource Identifier | In English | → Libraries |
| URL | Uniform Resource Locator | In English | |
| UTRAN | UMTS Terrestrial Radio Access Network | In English | → Telecommunications |
| VAX | Virtual Address Extended | In English | |
| VC-ATOD | Virtual Clearinghouse on Alcohol, Tobacco, and Other Drugs = CV-ATOD | Centro Virtual de Información sobre Alcohol, Tabaco y otras Drogas | In Spanish |
In English | → Medicine |
| VDSL | Very High Speed Digital Subscriber Line | In English | |
| VEB | Virtuala Esperanto-Biblioteko | In Esperanto | → Internet → Libraries |
| VEKI | Virtuala Esperanto Kongreso Internacia | In Esperanto | |
| VHDSL | Very High Speed Digital Subscriber Line | In English | |
| VIP | Virtual Instance Port | In English | → Telecommunications |
| VITE | Vienna IT Enterprises | In English | → Telecommunications |
| VPN | Virtual Private Network | In English | ,→ Telecommunications |
| W3C | World Wide Web Consortium | In English | → Organizations and associations |
| WACT | Web Application Component Toolkit | In French | → Software |
| WAI | Web Accessibility Initiative | In English | → Internet → Telecommunications |
| WAN | Wide Area Network | In English | |
| WAP | Wireless Access Protocol | In English | → Telecommunications |
| WCDMA | Wideband Code Division Multiple Access | In English | → Telecommunications |
| WCM | Web Content Management | In English | → Document processing → Knowledge management |
| WDM | Wavelength Division Multiplexing | In English | → Telecommunications |
| WebDAV | Web-based Distributed Authoring and Versioning | In English | → Document processing |
| WFQ | Weighted Fair Queueing | In English | |
| WHATWG | Web Hypertext Application Technology Working Group | In English | → Internet → Telecommunications |
| WIEU | Women's International Electronic University | In English | → Higher education, universities |
| WMAN | Wireless Metropolitan Area Network | In English | → Telecommunications |
|