| SerbEJO | Serbia Esperanto Junulara Organizo | In Esperanto | → Organizations and associations |
| SERPs | Search Engine Ranking Pages | In English | → Internet → Computer-based techniques |
| SeRv | Sensor Review | In English | → Serial publications, periodicals → Applied sciences, technology |
| SES | Software Evaluation Subpanel | In English | → Software |
| SeS | Salute e Sviluppo | In Italian | → Organizations and associations |
| SES | Svisa Esperanto-Societo (http://esperan.to/ses/) | In Esperanto | → Associations |
| SESAME | Soutien aux Équipes Scientifiques pour l'Acquisition de Moyens Expérimentaux | In French | → 00186 |
| SESAME | Session d'Épreuves Spécifiques à l'Admission au Management Européen et international | In French | → Management → Education |
| SESAME | Système d'Exploration de Séquences Audiovisuelles et Multimédias Enrichi par l'Expérience | In French | → Computer-based techniques → Cinema, movies |
| SeScT | Semiconductor Science Technology | In English | → Serial publications, periodicals → Electronics |
| SESKO | Sähkö- ja elektroniikka-alan standardisointijärjestö | In Finnish | → Standardization → Electronics |
| SESL | Space Environment(al) Simulation Laboratory | In English | → Research institutes → Spaceflight engineering, astronautics |
| SeSTS | Semiconductor Science Technology Supplement | In English | → Serial publications, periodicals → Electronics |
| SET | Secure Electronic Transaction | In English | → Networks, communication → Telecommunications |
| SETC | Small Engine Technology Conference | In English | → Organizations and associations → Vehicle engineering |
| SETELI | Suomen Erityisteknisten Liitto | In Finnish | → Organizations and associations → Engineering, technology |
| SEUL | Syndicat des Employés de l’Université Laurentienne = LUSU | Laurentian University Staff Union | In English |
In French | → Organizations and associations → Labour, labour economics → Higher education, universities |
| SEVN | Syndicat de l’Édition Vidéo Numérique | In French | → Organizations and associations → Computer-based techniques → Telecommunications |
| SEVN | Syndicat de l'Édition Vidéo Numérique (www.sevn.fr) | In French | → Organizations and associations → Cinema, movies |
| SEXI | String EXpression Interpreter | In English | → Programming languages |
| SFA | Swedish Foundry Association | In English | → Associations → Metallurgy |
| SFACI | Software Flight Article Configuration Inspection | In English | → Software → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| SFAI | Syndicat Français des Artistes Interprètes | In French | → Organizations and associations → Cinema, movies |
| SFAIC | Société Française d'Allergologie et d'Immunologie Clinique | In French | → Organizations and associations → Immunology and allergy |
| SFAR | Société Française d'Anesthésie et de Réanimation | In French | → Organizations and associations → Anesthesiology |
| SFB | Spezialforschungbereich | In German | → Research policy |
| SFBMN | Société Française de Biologie et Médecine Nucléaire | In French | → Organizations and associations → Biological sciences → Medicine |
| SFC | Société Française du Cancer | In French | → Organizations and associations → Oncology |
| SFC | Société Française de Céramique | In French | → Organizations and associations → 666 |
| SFDRMG | Société Française de Documentation et de Recherche en Médecine Générale | In French | → Organizations and associations → Medicine |
| SFEN | Société Française pour l’Énergie Nucléaire | In French | → Organizations and associations → Energy economics → Nuclear technology |
| SFEN | Société Française d'Énergie Nucléaire | In French | → Organizations and associations → Energy economics → Nuclear technology |
| SFF | Sammenslutningen af Firma-Funktionærer | In Danish | → Organizations and associations → Labour, labour economics |
| SFG | Steirische Wirtschaftsförderungsgesellschaft | In German | → Organizations and associations → Economics |
| SFHS | Society for French Historical Studies | In English | → Organizations and associations → History |
| SFHTA | Société Française d'Hypertension Artérielle | In French | → Organizations and associations → Blood and circulatory system → Cardiology |
| SFIC | Syndicat Français de l'Industrie Cimentière | In French | → Organizations and associations → Civil engineering → Building |
| SFLC | Software Freedom Law Center | In English | → Software → Law, jurisprudence |
| SFM | Senior Functional Manager | In English | → Management |
| SFMS | Société Française de Médecine du Sport | In French | → Organizations and associations → Medicine → Sport, physical exercises |
| SFMS | Societé Francophone de Médecine Sexuelle | In French | → Organizations and associations → Sexual problems → Urology → Applied sciences, technology |
| SFO | Société Française d’Optique | In French | → Organizations and associations → Optics |
| SFOG | Société Française d'Oncologie Gynécologique | In French | → Organizations and associations → Oncology → Gynaecology |
| SFOP | Société Française d'Oncologie Pédiatrique | In French | → Organizations and associations → Oncology → Pediatry |
| SFPC | Société Française de Pharmacie Clinique (www.adiph.org/sfpc/) | In French | → Organizations and associations → Pharmacology, toxicology |
| SFPL | San Francisco Public Library | In English | → Libraries |
| SFPO | Société Française de Pharmacie Oncologique | In French | → Organizations and associations → Pharmacology, toxicology → Oncology |
| SFPPL | Short-Form Provisioning Parts List | In English | → Maintenance and logistics |
| SFR | Société Française de Radiologie (www.sfr-radiologie.asso.fr) | In French | → Organizations and associations → Medicine |
| SFR | Société Française de Rhumatologie (www.rhumatologie.asso.fr) | In French | → Organizations and associations → Medicine |
| SFRO | Société Française de Radiothérapie Oncologique | In French | → Organizations and associations → Oncology |
| SFS | Svensk Författningssamling | In Swedish | → Libraries |
| SFS | Suomen Standardisoimisliitto | In Finnish | → Standardization |
| SFTC | Syndicat Français des Théâtres Cinématographiques | In French | → Organizations and associations → Cinema, movies → Theatre |
| SFV | Société Française de Vexillologie | In French | → Organizations and associations → 9299 |
| SGAICO | Swiss Group for Artificial Intelligence and Cognitive Science | In English | → Artificial intelligence |
| SGAM | Schweizerische Gesellschaft für Allgemeinmedizin | In German | → Organizations and associations → Medicine |
| SGAS | Society for German-American Studies | In English | → Organizations and associations → Area studies |
| SGBD | Sistema de Gestió de Bases de Dades = DBMS | Data Base Management System | In English = SGBD | Système de Gestion de Base de Données | In French = SŘBD | Systém řízení báze dat | In Czech = SMBD | Sistem manajemen basis data | In Indonesian = SUBP | Sustav za upravljanje bazom podataka | In Croatian = DBKS | Datu-baseak kudeatzeko sistema | In Basque = SGBD | Sistema de gestión de base de datos | In Spanish = DBMS | Datenbankmanagementsystem | In German |
In Catalan | → Data |
| SGBD | Sistema de gestión de base de datos = DBMS, SŘBD, SMBD, SUBP, DBKS (look above) |
In Spanish | → Data |
| SGBD | Système de Gestion de Base de Données = DBMS, SŘBD, SMBD, SUBP, DBKS (look above) |
In French | → Data |
| SGBDRO | Système de Gestion de Base de Données Relationnelle et Objet | In French | → Data |
| SGC | Système de Gestion de Contenu(s) = CMS | Content Management System | In English |
In French | → Document processing → Knowledge management |
| SGC | Server Gated Cryptography | In English | → Internet → Mathematics |
| SGDT | Système de Gestion de Données Techniques | In French | → Data → Knowledge management |
| SGEN | Syndicat Général de l'Éducation Nationale | In French | → Organizations and associations → Labour, labour economics → Education |
| SGeo | Surveys in Geophysics | In English | → Serial publications, periodicals → Geophysics |
| SGFF | Schweizerische Gesellschaft für Fahnen- und Flaggenkunde | In German | → Organizations and associations → 9299 |
| SGI | Società Geologica Italiana | In Italian | → Organizations and associations → Earth sciences |
| SGML | Standard Generalized Markup Language | In English | → Programming languages → Data → Document processing |
| SGMT | Simulated Greenwich Mean Time | In English | → Standardization |
| SGORS | Studies in Geophysical Optics and Remote Sensing | In English | → Serial publications, periodicals → Geophysics → Geodesy, cartography |
| SGRL | South Georgia Regional Library (www.sgrl.org) | In English | → Libraries |
| SGS | Schweizerische Gesellschaft für Soziologie | In German | → Organizations and associations → Sociology |
| SGSM | Schweizerische Gesellschaft für Sportmedizin = SSMS | Société Suisse de Médecine du Sport | In French |
In German | → Organizations and associations → Medicine → Sport, physical exercises |
| SGTIF | Syndicat Général des Travailleurs de l'Industrie du Film (http://sgtif.fnsac-cgt.com) | In French | → Organizations and associations → Labour, labour economics → Cinema, movies |
| SHA | Southern Historical Association | In English | → Associations → History |
| SHA | Secure Hash Algorithm | In English | → Computer science → Mathematics |
| SHAFR | Society for Historians of American Foreign Relations | In English | → Organizations and associations → International relations → History |
| SHARP | Society for the History of Authorship, Reading, and Publishing | In English | → Organizations and associations → Artistic property → Graphic industries, printing, publishing → History |
| SHC | Société Historique du Canada = CHA | Canadian Historical Association | In English |
In French | → Organizations and associations → History |
| SHCS | Society for Hindu-Christian Studies | In English | → Organizations and associations → Indian religions → Christianity |
| SHD | Society for the History of Discoveries | In English | → Organizations and associations → History |
| SHDV | Schleswig-Holsteiner Dartverband | In German | → Organizations and associations → Sport, physical exercises |
| SHE | Society for History Education | In English | → Organizations and associations → Education → History |
| SHEAR | Society for Historians of the Early American Republic | In English | → Organizations and associations → History |
| SHEP | Surveys in High Energy Physics | In English | → Serial publications, periodicals → Nuclear, atomic, and molecular physics |
| SHFG | Society for History in the Federal Government | In English | → Organizations and associations → Central administration → History |
| SHGAPE | Society for Historians of the Gilded Age and Progressive Era | In English | → Organizations and associations → History |
| SHIVA | Simulated Highways for Intelligent Vehicle Algorithms | In English | → Computer simulation → Transport and postal services |
| SHLB | Simulation Hardware Load Box | In English | → Hardware → Computer simulation |
| SHMPS | Sources in the History of Mathematics and Physical Sciences | In English | → Serial publications, periodicals → Mathematics → Physics → History |
| SHOE | Simple Hypertext Ontology Extensions | In English | → Networks, communication → Linguistics |
| SHOT | Society for the History of Technology | In English | → Organizations and associations → Engineering, technology → History |
| SHS | Simulation Hardware System | In English | → Hardware → Computer simulation |
| SHS | Societas Heraldica Slovenica (www.heraldica.si) | In Latin | → Organizations and associations → 9299 |
| ShWav | Shock Waves | In English | → Serial publications, periodicals → Acoustics |
| SI | Sveriges Industriförbund | In Swedish | → Organizations and associations → Industry, industrial policy |
| SI | Sports Illustrated | In English | → Newspapers, journalism → Sport, physical exercises |
| SI | Système International | In French | → Standardization |
| SI/FS | System Integration and Flight Software | In English | → Software → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| SIA | Software Impact Assessment | In English | → Software |
| SIA | Société des Ingénieurs de l'Automobile | In French | → Organizations and associations → Automobile manufacturing |
| SIA | Società Italiana di Andrologia | In Italian | → Organizations and associations → Sexual problems → Urology |
| SIA | Société suisse des Ingénieurs et des Architectes = SIA | Schweizerischer Ingenieur- und Architekten-Verein | In German |
In French | → Organizations and associations → Engineering, technology → Architecture |
| SIA | Schweizerischer Ingenieur- und Architekten-Verein = (look above) |
In German | → Organizations and associations → Engineering, technology → Architecture |
| SIAE | Structure d’Insertion par l’Activité Économique | In French | → Organizations and associations → Economics → Social welfare |
| SIAE | Società Italiana degli Autori ed Editori (www.siae.it) | In Italian | → Organizations and associations |
| SIB | Simulation Interface Buffer | In English | → Human-computer interaction → Computer simulation |
| SIC | Standard Industrial Classification | In English | → Standardization |
| SIC | Sociology in China | In English | → Organizations and associations → Sociology |
| SICAE | Syndicat d’Intérêt Collectif Agricole Électricité | In French | → Organizations and associations → Agricultural sciences → Electrical engineering |
| SICAHR | Société coopérative d’Intérêt Collectif Agricole d’Habitat Rural | In French | → Organizations and associations → Regional planning |
| SICI | Società Italiana di Citologia | In Italian | → Organizations and associations → Cytology |
| SICOGIF | Syndicat national des Industries de la COmmunication Graphique et de l'Imprimerie Françaises | In French | → Organizations and associations → Graphic industries, printing, publishing → Graphic arts |
| SICR | Syndicat de l'Importation et du Commerce de la Réunion | In French | → Organizations and associations → Trade |
| SICRI | Small Island Cultures Research Initiative | In English | → Civilization, culture, progress → Sociology |
| SICT | Syndicat des Ingénieurs, Cadres, Techniciens | In French | → Organizations and associations → Labour, labour economics |
| SICTAM | Syndicat des Ingénieurs, Cadres, Techniciens et Agents de Maîtrise | In French | → Organizations and associations → Labour, labour economics |
| SID | Standard Interface Document | In English | → Human-computer interaction |
| SID | Simulator Interface Device | In English | → Human-computer interaction |
| SID | System Interface Document | In English | → Human-computer interaction |
| SID | Système d’Information Documentaire | In French | → Knowledge management |
| SIE | Shuttle Interface Equipment | In English | → Human-computer interaction → Spaceflight engineering, astronautics |
| SIE | Society of Industrial Engineers | In English | → Organizations and associations → Engineering, technology |
| SIE | Système d'Information sur l'Eau | In French | → Knowledge management → Hydrology → 627 → Environmental technology, water supply, waste management |
| SIES | Supervision, Inspection, Engineering, and Services | In English | → Management → Engineering, technology |
| SIF | Service Informatique Fédéral | In French | → Computer science → Central administration |
| SIFC | Società Italiana per lo Studio della Fibrosi Cistica | In Italian | → Organizations and associations → Pathology |
| SIFC | Swindon Ice Figure Club | In English | → Organizations and associations → Sport, physical exercises |
| SIFC | Scottish Inter Faith Council | In English | → Organizations and associations → Religion, theology |
| SIFF | Syndicat des Industries Françaises du Fibres-ciment (www.fibres-ciment.fr) | In French | → Organizations and associations → Civil engineering → Building |
| SIG | Sistema de informação geográfica = GIS | Geographic(al) Information System | In English = SIG | Sistema Informativo Geografico | In Italian = SIG | Sistema de Información Geográfica | In Spanish = SIG | Sistema d'informació geogràfica | In Catalan = GIS | Geografický Informační Systém | In Czech = ГИС | Географска информационна система | In Bulgarian = ΓΣΠ | Γεωγραφικά Συστήματα Πληροφοριών | In Greek = GIS | Geographisches Informationssystem | In German = GIS | Geoinformationssystem | In German = GIS | Geoinfosüsteem | In Estonian = GIS | Geografski informacijski sustav | In Croatian = ממ"ג | מערכת מידע גאוגרפית | In Hebrew = GIS | Geografinė informacinė sistema | In Lithuanian = SIG | Sistem Informasi Geografis | In Indonesian = GIS | Geografisch Informatiesysteem | In Dutch = GIS | Geografiske informasjonssystem | In Nynorsk = GIS | Geografiske informasjonssystemer | In Norwegian = ГИС | Географическая Информационная Система | In Russian = GIS | Geografski informacijski sistem | In Slovenian = GIS | Geografiskt InformationsSystem | In Swedish = ГІС | Геоінформаційна система | In Ukrainian |
In Portuguese | → Software → Geography |
| SIG | Sistema de Información Geográfica = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Spanish | → Software → Geography |
| SIG | Sistema d'informació geogràfica = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Catalan | → Software → Geography |
| SIG | Sistem Informasi Geografis = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Indonesian | → Software → Geography |
| SIG | Sistema Informativo Geografico = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Italian | → Software → Geography |
| SIG | Special Interest Group | In English | → Organizations and associations |
| SIG | Système d'Information Géographique = TAC | Traitement Communautaire Assertif | In French = PACT | Program Assertif Community Treatment | In English |
In French | → Software → Geography |
| SIG | Service d'Information du Gouvernement | In French | → 0594 → Central administration |
| SIGB | Système Intégré de Gestion de Bibliothèque = ILS | Integrated Library System | In English = АБИС | Автоматизированные библиотечные информационные системы | In Russian |
In French | → Knowledge management → Libraries → Software |
| SIGCHI | Special Interest Group on Computer–Human Interaction | In English | → Organizations and associations → Human-computer interaction |
| SIGLE | System for Information on Grey Literature in Europe | In English | → Libraries → Knowledge management |
| SIHS | Society for Italian Historical Studies | In English | → Organizations and associations → History |
| SII | Standards Institution of Israel | In English | → Standardization |
| SIJLAB | Sino-Italian Joint Laboratory of Archimede's Bridge | In German | → Research institutes → Civil engineering |
| SIL | System Integration Laboratory | In English | → Research institutes |
| SIL | Solidarité Internationale Libertaire = ILS | International Libertarian Solidarity | In English |
In French | → Organizations and associations → Political parties and movements |
| SIL | Su'aalaha Intabadan La'isweydiiyey = FAQ | Frequently Asked Questions | In English = FAQ | Foire Aux Questions | In French = POD | Plej Oftaj Demandoj | In Esperanto |
In Somali | → Science and knowledge |
| SIM | Sistema Interamericano de Metrología | In Spanish | → Standardization |
| SIM | Singapore Institute of Management | In English | → Management → Higher education, universities |
| SIMAC | Semantic Interaction with Music Audio Contents | In English | → Computer-based techniques → Music |
| SiMaJ | Siberian Mathematical Journal | In English | → Serial publications, periodicals → Mathematics |
| SIMS | Single Inventory Management System | In English | → Maintenance and logistics |
| SIN | Support Information Network | In English | → Networks, communication → Knowledge management |
| SINDIPEÇAS | Sindicato Nacional da Indústria de Componentes para Veículos Automotores | In Portuguese | → Organizations and associations → Vehicle engineering |
| SINDUSCON | Sindicato da Industria da Construção Civil | In Portuguese | → Organizations and associations → Civil engineering |
| SINTEF | Stiftelsen for industriell og teknisk forskning | In Norwegian | → Research policy → Engineering, technology |
| SINTEF | Selskapet for INdustriell og TEknisk Forskning | In Norwegian | → Research policy |
| SIO | Sisustusarkkitehdit Inredningsarkitekterna | In Finnish | → Organizations and associations → Architecture |
| SIO | Serial Input/Output | In English | → Computer science |
| SIO | System Internetowy Olimpiady | In Polish | → Networks, communication |
| SIOgim | System Internetowy Olimpiady Gimnazjalistów | In Polish | → Networks, communication → Computer science |
| SIOP | Strategic Integrated Operations Plan | In English | → Management |
| SIOP | Single Integrated Operations Plan | In English | → Management |
| SIOP | Single Integrated Operational Plan | In English | → Management |
| SIP | Standard Interface Panel | In English | → Human-computer interaction |
| SIP | Standard Interface Plan | In English | → Human-computer interaction |
| SIP | Strategic Information Plan | In English | → Knowledge management |
| SIP | Software Input Panel | In English | → Software |
| SIP | Session Initiation Protocol | In English | → Networks, communication → Telecommunications |
| SIPB | Student Information Processing Board | In English | → Software → Specialized or (poly)technical colleges |
| SIPPEREC | Syndicat Intercommunal de la Périphérie de Paris pour l'Électricité et les RÉseaux de Communication | In French | → Organizations and associations → Electrical engineering → Telecommunications |
| SIPRI | Stockholm International Peace Research Institute (www.sipri.org) | In English | → Research institutes → International relations |
| SIRA | Système d'Informations pour la Recherche en Accidentologie | In French | → Data → Transport and postal services |
| SIRENE | Système Informatique pour le Répertoire des ENtreprises et Établissements | In French | → Computer-based techniques → Economics |
| SIRES | Sindicato da Indústria de Resinas Sintéticas | In Portuguese | → Organizations and associations → Chemical technology |
| SIRH | Systèmes d'Information Ressources Humaines | In French | → Personnel management → Labour, labour economics |
| SIRR | Software Integration Readiness Review | In English | → Software |
| SIRS | Système d'Information à Référence Spatiale | In French | → Software → Geography |
| SIS | Shuttle Information System | In English | → Knowledge management → Spaceflight engineering, astronautics |
| SIS | Shuttle Information Service | In English | → Knowledge management → Spaceflight engineering, astronautics |
| SIS | SAIL Interface System | In English | → Human-computer interaction |
| SIS | Software Implementation Specification | In English | → Software |
| SIS | Software Integrated Schedule | In English | → Software |
| SIS | Simulator Interface System | In English | → Human-computer interaction |
| SIS | Simulation Interface Subsystem | In English | → Human-computer interaction |
| SIS | Shuttle Interface Simulator | In English | → Human-computer interaction → Spaceflight engineering, astronautics |
| SIS | Standard Interface Specification | In English | → Human-computer interaction |
| SIS | Software Intensive System | In English | → Computer-based techniques |
| SIS | Standardiseringen i Sverige | In Swedish | → Standardization |
| SIS | Suomen Itämainen Seura | In Finnish | → Organizations and associations → Area studies |
| SISD | Simulation Interface and Standards Document | In English | → Human-computer interaction |
| SIST | Slovenski inštitut za standardizacijo | In Slovenian | → Standardization |
| SIST | Slovenian Institute for Standardization | In English | → Standardization |
| SISTM | Simulation of Strategies for Traffic on Motorways | In English | → Computer simulation → Transport and postal services |
| SIT | Software Integrated Test | In English | → Software |
| SIT | System Informacji o Terenie = SIT | Sistema Informativo Territoriale | In Italian = SIT | Système d'Information sur le Territoire | In French |
In Polish | → Software → Regional planning → Geography |
| SIT | Système d'Information sur le Territoire = (look above) |
In French | → Software → Regional planning → Geography |
| SIT | Sistema Informativo Territoriale = (look above) |
In Italian | → Software → Regional planning → Geography |