

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| SIA | Société des Ingénieurs de l'Automobile | In French | → Organizations and associations → Automobile manufacturing | 
| SIA | Salon International de l'Agriculture | In French | → Agricultural sciences | 
| SIA | Software Impact Assessment | In English | → Software | 
| SIA | Solar Inertial Attitude | In English | → Astronomy | 
| SIA | Structural Interface Adapter | In English | |
| SIA | System Integration Area | In English | |
| SIA | Société d'Investissement en Autriche | In French | → Finance | 
| SIA | Solidarité Internationale Antifasciste | In French | → 329 | 
| SIA | Service d'Information Aéronautique | In French | → Documentation → Transport by air → Aeronautics, aircraft | 
| SIA | Semiconductor Industry Association (www.sia-online.org) | In English | → 06128 → Electronics | 
| SIAE | Slovenian Institute for Adult Education | In English | → Education | 
| SIAE | Structure d'Insertion par l'Activité Économique | In French | → Social welfare → Economics | 
| SIAE | Società Italiana degli Autori ed Editori (www.siae.it) | In Italian | → Organizations and associations → Italia | 
| SIAL | Sana'a Institute for the Arabic Language | In English | → Linguistics | 
| SIAM | Society of Industrial and Applied Mathematics | In English | → Serial publications, periodicals → Mathematics → Engineering, technology | 
| SIAM | Solution Intégrée des Activités de Marchés | In French | |
| SIAMFESP | Sindicato da Indústria de Artefatos de Metais não Ferrosos no Estado de São Paulo (www.siamfesp.org.br) | In Portuguese | → Organizations and associations → Metallurgy → Brazil | 
| SIAP | System Integrity Assurance Program | In English | |
| SIAP | System for Improved Acoustic Performance | In English | → Acoustical engineering | 
| SIAPP | System Integrity Assurance Program Plan | In English | |
| SIARV | Syndicat Intercommunal pour l'Assainissement de la Région de Villeneuve-Saint-Georges | In French | → Environmental technology, water supply, waste management | 
| SIB | Seychelles Investment Bureau | In English | → 33972 | 
| SIB | Simulation Interface Buffer | In English | → Human-computer interaction → Computer simulation | 
| SIB | Systems Integration Board | In English | |
| SIB | Società Italiana di Buiatria (www.buiatria.it) | In Italian | → Organizations and associations → Agricultural sciences → Italia | 
| SIBA | Seychelles International Business Authority | In English | → 33972 | 
| SIBLING | Small Integrin Binding Ligand N-linked Glycoprotein | In French | → Proteins | 
| SIC | Sociology in China | In English | → Organizations and associations → Sociology → China | 
| SIC | Standard Industrial Classification | In English | → Standardization | 
| SIC | Système d'Information Commerciale | In French | → Software → Trade | 
| SIC | Système d'Information et de Commandement | In French | → Military affairs → Military engineering | 
| SICA | Structural Interface Compatibility Assessment | In English | |
| SICA | Sistema de la Integración Centroamericana (www.sica.int) | In Spanish | → International relations | 
| SICA | Secondary Inventory Control Activities | In English | → Maintenance and logistics | 
| SICA | Specific International Cooperation Action | In English | → Research policy → International economic cooperation | 
| SICA | Société d'Intérêt Collectif Agricole | In French | → Organizations and associations → Agricultural sciences | 
| SICA | Système d'Information et de Commandement des Armées | In French | → Software → Military affairs | 
| SICAE | Syndicat d'Intérêt Collectif Agricole Électricité | In French | → Organizations and associations → Agricultural sciences → Electrical engineering | 
| SICAE | Société d'Intérêt Collectif Agricole d'Électricité | In French | → Organizations and associations → Electrical engineering → Agricultural sciences | 
| SICAHR | Société coopérative d'Intérêt Collectif Agricole d'Habitat Rural | In French | → Organizations and associations → Accommodation → Agricultural sciences | 
| SICAP | Société Coopérative d’Intérêt Collectif Agricole de la Région de Pithiviers (www.sicap-pithiviers.net) | In French | → Organizations and associations → Electrical engineering → Agricultural sciences | 
| SICAV | Société d'Investissement à CApital Variable | In French | → Finance | 
| SICB | Society for Integrative and Comparative Biology (www.sicb.org) | In English | → Organizations and associations → Biological sciences | 
| SICBM | Small Intercontinental Ballistic Missile | In English | → Military engineering | 
| SICC | Service Item Control Center | In English | |
| SICCAM | Salon International des Centres de Contacts et d'Appels au Maroc | In French | → Telecommunications → Morocco | 
| SICF | Système d'Information pour le Commandement des Forces | In French | → Software → Military affairs | 
| SICFD | Système d'Information Client Fournisseur du Distributeur | In French | → Software → Energy economics | 
| SICI | Serial Item and Contribution Identifier | In English | |
| SICI | Standing International Conference of Inspectorates | In English | |
| SICI | Società Italiana di Citologia (www.citologia.org) | In Italian | → Organizations and associations → Cytology → Italia | 
| SICI | Shastri Indo-Canadian Institute (www.sici.org) | In English | → Organizations and associations → International relations | 
| SICI | Sistema Informativo Catastrofi Idrogeologiche | In Italian | → Earth sciences | 
| SICO | Sveriges Ishockeyspelares Centralorganisation (www.sico.nu) | In Swedish | → Organizations and associations → Sport, physical exercises → Sweden | 
| 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 → France | 
| SICOP | Service d'Information et de Communication de la Police Nationale | In French | → Police → Central administration | 
| 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 | 
| SICTOM | Syndicat Intercommunal de Collecte et Traitement des Ordures Ménagères | In French | → Environmental protection → Environmental technology, water supply, waste management → France | 
| SID | Système d'Information Documentaire | In French | → Knowledge management → Documentation | 
| SID | Shuttle Integration Device | In English | → Astronautics | 
| SID | Simulator Interface Device | In English | → Human-computer interaction | 
| SID | Standard Interface Document | In English | → Human-computer interaction | 
| SID | Standard Items Data Base | In English | |
| SID | System Interface Document | In English | → Human-computer interaction | 
| SID | Slew-Induced Distortion | In English | |
| SID | Standard Instrument Departure | In English | → Transport by air → Aeronautics, aircraft | 
| SIDA | Syndrome d'Immuno-Déficience Acquise = AIDS | Acquired Immune Deficiency Syndrome | In English = VIGS | Verworwe Immuniteitsgebreksindroom | In Afrikaans = SIDA | Síndrome de Inmuno-Deficiencia Adquirida | In Occitan = SIDA | Sindromo di Imuno-Defekteso Aquirita | In Ido = AIDS | Akirita Imuno-Deficita Simptomaro | In Esperanto = SIDA | Sindrome d'inmunodefizienzia aquirita | In Aragonese = СПИН | Синдром на придобитата имунна недостатъчност | In Bulgarian = QİÇS | Qazanılmış İmmun Çatışmazlığı Sindromu | In Azerbaijani = SIDA | Síndrome d'Immunodeficiència Adquirida | In Catalan = HIES | Hartutako Immuno Eskasiaren Sindromea | In Basque = SIDA | Síndrome de Inmunodeficiencia Adquirida | In Spanish = SEIF | Siondróm Easpa Imdhíonachta Faighte | In Irish = AIDS | Annlochd Inneamh Dìon-Slàinte | In Scottish Gaelic = ՁԻԱՀ | Ձեռքբերովի Իմունային Անբավարվածության Համախտանիշ | In Armenian = SCDI | Syndromis Comparatis Defectu Immunitatis | In Latin = 에이즈 | 후천성 면역 결핍 증후군 | In Korean = შიდსი | შეძენილი იმუნური დეფიციტის სინდრომი | In Georgian = СИДА | Синдромот на стекнат имунолошки дефицит | In Macedonian = СИДА | синдром стеченог имунолошког дефицита | In Serbian = AIDS | Akvirírani imúnski deficítni sindróm | In Slovenian = СПИД | Синдром приобретённого иммунного дефицита | In Russian = SIDA | Sindromul Imunodeficienţei Autodobândite | In Romanian = UHCW | Unquy hark'aypa chaskisqa waqlliynin | In Quechua = SIDA | Síndrome da imunodeficiência adquirida | In Portuguese = AIDS | Hội chứng Suy giảm Miễn dịch Mắc phải | In Vietnamese = СНІД | Cиндром набутого імунодефіциту | In Ukrainian = AIDS | Alınğan İmmun Defisit Síndromı | In Tatar = UKIMWI | Upungufu wa Kinga Mwilini | In Swahili | In French | → Immunology and allergy → Infectious diseases | 
| SIDA | Síndrome de Inmuno-Deficiencia Adquirida = AIDS, VIGS, СПИН, QİÇS, HIES, SEIF, ՁԻԱՀ, SCDI, 에이즈, შიდსი, СИДА, СПИД, UHCW, СНІД, UKIMWI (look above) | In Occitan | → Immunology and allergy → Infectious diseases | 
| SIDA | Sindromo di Imuno-Defekteso Aquirita = AIDS, VIGS, СПИН, QİÇS, HIES, SEIF, ՁԻԱՀ, SCDI, 에이즈, შიდსი, СИДА, СПИД, UHCW, СНІД, UKIMWI (look above) | In Ido | → Immunology and allergy → Infectious diseases | 
| SIDA | Sindrome d'inmunodefizienzia aquirita = AIDS, VIGS, СПИН, QİÇS, HIES, SEIF, ՁԻԱՀ, SCDI, 에이즈, შიდსი, СИДА, СПИД, UHCW, СНІД, UKIMWI (look above) | In Aragonese | → Immunology and allergy → Infectious diseases | 
| SIDA | Síndrome d'Immunodeficiència Adquirida = AIDS, VIGS, СПИН, QİÇS, HIES, SEIF, ՁԻԱՀ, SCDI, 에이즈, შიდსი, СИДА, СПИД, UHCW, СНІД, UKIMWI (look above) | In Catalan | → Immunology and allergy → Infectious diseases | 
| SIDA | Síndrome de Inmunodeficiencia Adquirida = AIDS, VIGS, СПИН, QİÇS, HIES, SEIF, ՁԻԱՀ, SCDI, 에이즈, შიდსი, СИДА, СПИД, UHCW, СНІД, UKIMWI (look above) | In Spanish | → Immunology and allergy → Infectious diseases | 
| SIDA | Sindromul Imunodeficienţei Autodobândite = AIDS, VIGS, СПИН, QİÇS, HIES, SEIF, ՁԻԱՀ, SCDI, 에이즈, შიდსი, СИДА, СПИД, UHCW, СНІД, UKIMWI (look above) | In Romanian | → Immunology and allergy → Infectious diseases | 
| SIDA | Síndrome da imunodeficiência adquirida = AIDS, VIGS, СПИН, QİÇS, HIES, SEIF, ՁԻԱՀ, SCDI, 에이즈, შიდსი, СИДА, СПИД, UHCW, СНІД, UKIMWI (look above) | In Portuguese | → Immunology and allergy → Infectious diseases | 
| SIDC | Space Innovation and Development Center | In English | → Research institutes → Astronomy → Astronautics | 
| SIDIRE | Synthetic Image Dataset for Illumination Robustness Evaluation | In English | → Image processing | 
| SIDL | System Identification List | In English | |
| SIDS | Sudden Infant Death Syndrome | In English | → Pediatry | 
| SIE | Système d'Information Environnementale | In French | → Software → Knowledge management → Environmental protection → Threats to the environment | 
| SIE | Système d'Information sur l'Eau | In French | → Knowledge management → Hydrology → 627 → Environmental technology, water supply, waste management | 
| SIE | Stage d'Insertion en Entreprise | In French | → Labour, labour economics | 
| SIE | SAT Integrated Experiment | In English | |
| SIE | SATKA Integrated Experiment | In English | |
| SIE | Shuttle Interface Equipment | In English | → Human-computer interaction → Astronautics | 
| SIE | Society of Industrial Engineers | In English | → Organizations and associations → Engineering, technology | 
| SIE | System Integration Engineer | In English | → Engineering, technology | 
| SIE | Speciaal Interventie Eskadron | In Dutch | → Police | 
| SIEB | Security Impact Evaluation Board | In English | |
| SIEC | State Independent Electoral Commission | In English | → Elections | 
| SIECA | Secretaría de Integración Económica Centroamericana (www.sieca.org.gt) | In Spanish | |
| SIECLE | Serveur Intranet des Enquêtes CLientèle EDF-GDF | In French | → Software → Trade → Energy economics | 
| SIEM | Système d'Information Emploi et Mobilité | In French | → Personnel management | 
| SIEM | Sistema Integrado de Emergência Médica | In Portuguese | → Traumatology | 
| SIEPA | Serbia Investment and Export Promotion Agency | In English | → 33972 | 
| SIER | Service Interdépartemental d'Exploitation Routière | In French | → Public administration, government → Transport and postal services | 
| SIERP | Syndicat Intercommunal d'Électricité pour la Région de Pithiviers | In French | → Organizations and associations → Electrical engineering | 
| SIES | Supervision, Inspection, Engineering, and Services | In English | → Management → Engineering, technology | 
| SIF | Sustainable Indigenous Futures | In English | |
| SIF | Sistemul de Informare Naţional | In Romanian | |
| SIF | Service Information Famille | In French | |
| SIF | Service Informatique Fédéral | In French | → Computer science → Central administration | 
| SIF | Systems Integration Facility | In English | |
| SIFAO | Salon Inversé de la Filière Automobile de l'Ouest | In French | → Automobile manufacturing | 
| SIFC | Saskatchewan Indian Federated College | In English | → Education → Canada | 
| SIFC | Stable Isotope Fractionation Calculator = CFIS | Calculateur du Fractionnement des Isotopes Stables | In French | In English | → Atomic physics | 
| SIFC | Somali International Financial Centre | In English | → Finance | 
| SIFC | Società Italiana per lo Studio della Fibrosi Cistica | In Italian | → Organizations and associations → Pathology → Italia | 
| SIFC | Service de l'Instruction des Forces Canadiennes | In French | → Education → Military affairs → Canada | 
| SIFC | Swindon Ice Figure Club | In English | → Organizations and associations → Sport, physical exercises | 
| SIFC | Scottish Inter Faith Council (www.scottishinterfaithcouncil.org) | In English | → Organizations and associations → Religion, theology → United Kingdom | 
| SIFC | Southern Interior Flight Centre | In English | → Transport and postal services | 
| SIFC | Susanville Interagency Fire Center | In English | |
| SIFC | Saskatoon International Folkdance Club | In English | → Organizations and associations → Dance → Canada | 
| SIFCOM | Structures des Interfaces et Fonctionnalité des Couches Minces | In French | → Physics | 
| SIFF | Syndicat des Industries Françaises du Fibres-ciment (www.fibres-ciment.fr) | In French | → Organizations and associations → Civil engineering → Construction → France | 
| SiFoE | Siemens Forschungs- und Entwicklungsberichte | In German | → Serial publications, periodicals → Engineering, technology | 
| SIFR | Scalable Inman Flash Replacement | In English | → Software → Internet | 
| SIG | Special Interest Group | In English | → Organizations and associations | 
| SIG | Système d'Information Géographique = 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 = SIG | Sistema de informação geográfica | In Portuguese = ГИС | Географическая Информационная Система | In Russian = GIS | Geografski informacijski sistem | In Slovenian = GIS | Geografiskt InformationsSystem | In Swedish = ГІС | Геоінформаційна система | In Ukrainian | In French | → Software → Databases → Knowledge management → Geography | 
| SIG | Sistema Informativo Geografico = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) | In Italian | → Software → Databases → Knowledge management → Geography | 
| SIG | Service d'Information du Gouvernement | In French | → Knowledge management → Central administration | 
| SIG | Sistema de Información Geográfica = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) | In Spanish | → Software → Databases → Knowledge management → Geography | 
| SIG | Sistema d'informació geogràfica = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) | In Catalan | → Software → Databases → Knowledge management → Geography | 
| SIG | Sistem Informasi Geografis = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) | In Indonesian | → Software → Databases → Knowledge management → Geography | 
| SIG | Sistema de informação geográfica = GIS, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) | In Portuguese | → Software → Databases → Knowledge management → Geography | 
| SIG | Solde Intermédiaire de Gestion | In French | → Accounting | 
| 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 | 
| SIGB | Standard Interface Glovebox | In English | |
| 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 | 
| SIGMUND | Semantik- und emotionsbasiertes Gesprächs-Management in der Kundenberatung | In German | → Psychology → Trade | 
| SIGP | Scientific Instrument Gas Purge | In English | |
| SigPr | Signal Processing | In English | → Serial publications, periodicals → Electronics → Telecommunications | 
| SIHS | Society for Italian Historical Studies | In English | → Organizations and associations → History | 
| SII | Standards Institution of Israel | In English | → Standardization | 
| SIIA | Singapore Institute of International Affairs | In English | → International relations | 
| SIIC | Société d'Investissement immobilier Cotée | In French | → Finance | 
| SIIF | Société Internationale d'Investissements Financiers | In French | → Finance | 
| SIIS | Shanghai Institute for International Studies | In English | → International relations | 
| SIJLAB | Sino-Italian Joint Laboratory of Archimede's Bridge | In German | → Research institutes → Civil engineering | 
| SIL | Solidarité Internationale Libertaire = ILS | International Libertarian Solidarity | In English | In French | → Organizations and associations → Anarchist organizations | 
| SIL | Sound Interference Level | In English | |
| SIL | Speech Interference Level | In English | |
| SIL | System Integration Laboratory | In English | → Research institutes | 
| SIL | Su'aalaha Intabadan La'isweydiiyey = FAQ | Frequently Asked Questions | In English = FAQ | Foire Aux Questions | In French = KKK | Korduma Kippuvad Küsimused | In Estonian = POD | Plej Oftaj Demandoj | In Esperanto | In Somali | → Science and knowledge | 
| SIL | Saved Image Library | In English | → Software | 
| SILEC | Société Industrielle de Liaison Électrique | In French | → Electrical engineering | 
| SILL | Socle Interministériel de Logiciels Libres | In French | → Central administration → Software → France | 
| SILTS | Shuttle Infrared Lee-Side Temperature Sensing | In English | → Astronautics | 
| SIM | Sistema Interamericano de Metrología | In Spanish | → Standardization | 
| SIM | Singapore Institute of Management | In English | → Management → Higher education, universities | 
| SIM | Subscriber Identity Module | In English | → Telecommunications | 
| SIM | Scientific Instrumentation Module | In English | |
| SIMAC | Semantic Interaction with Music Audio Contents | In English | → Computer-based techniques → Music | 
| SIMAC | SIMulateur d'Agitation Côtière | In French | → Marine research, oceanography | 
| SiMaJ | Siberian Mathematical Journal | In English | → Serial publications, periodicals → Mathematics | 
| SIMAP | Similarity Matrix of Proteins | In English | → Proteins | 
| SIMAP | Service des Industries Manufacturières et des Activité Postales | In French | → Organizations and associations → Industry, industrial policy → Postal services | 
| SIMAP | Système d'Information pour les Marchés Publics | In French | → Knowledge management → Public administration, government | 
| SIMAS | Shuttle Information Management Accountability System | In English | → Astronautics | 
| SIMAVI | Steun in Medische Aangelegenheden Voor Inheemsen | In Dutch | → Medicine | 
| SIMBL | SIMple Bundle Loader | In English | → Software | 
| SIMCA | Société Industrielle de Mécanique et Carrosserie Automobile | In French | → Mechanical engineering → Automobile manufacturing | 
| SIMCAT | Simulate Observations Using Space Catalog | In English | → Astronomy | 
| SIMCHE | Simulation and Checkout Equipment | In English | |
| SIMEX | Singapore International Monetary Exchange | In English | → Financial markets | 
| SIMFAC | Simulation Facility | In English | |
| SIMO | Single Instruction, Multiple Data Paths | In English | |
| SiMol | Single Molecules | In English | → Serial publications, periodicals → Biochemistry, biophysics | 
| SIMR | Systems Integration Management Review | In English | |
| SIMS | Secondary Ion Mass Spectroscopy | In English | → Chromatography, mass spectrography | 
| SIMS | Shuttle Imaging Microwave System | In English | → Astronautics | 
| SIMS | Shuttle Inventory Management System | In English | → Maintenance and logistics → Astronautics | 
| SIMS | Single Inventory Management System | In English | → Maintenance and logistics | 
| SIN | Support Information Network | In English | → Networks, communication → Knowledge management | 
| SIN | Signal Induced Noise | In English | |
| SINDA | System(s) Improved Numerical Differences Analyzer | In English | |
| SINDA | Systems Improved Numerical Differences Analyzer | In English | |
| 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 | 
| SINE | Short Interspersed Nuclear Element | In English | → Genetics | 
| SINE | Système d'Information sur les Nouvelles Entreprises | In French | → Statistics → Economics | 
| SINETICS | SImulation NEutronique, Technique de l'Information et Calcul Scientifique | In French | → Nuclear technology | 
| SINHAS | Studies in Nepali History and Society | In English | → Sociology → History | 
| SINOTO | Samenspel Is Noodig Om Te Overwinnen | In Dutch | → Organizations and associations → Sport, physical exercises | 
| SINTEF | Selskapet for INdustriell og TEknisk Forskning | In Norwegian | → Research policy | 
| SINTEF | Stiftelsen for industriell og teknisk forskning | In Norwegian | → Research policy → Engineering, technology | 
| SIO | Sisustusarkkitehdit Inredningsarkitekterna | In Finnish | → Organizations and associations → Architecture | 
| SIO | System Internetowy Olimpiady | In Polish | → Internet | 
| SIO | Serial Input/Output | In English | → Computer science | 
| SIO | Staged In Orbit | In English | → Astronautics | 
| SIO | Systems Integration Office | In English | |
| SIO | Scripps Institution of Oceanography (www-sio.ucsd.edu) | In English | → Research institutes → Marine research, oceanography | 
| SIOC | Système d'Information Opérationnel et de Commandement | In French | → Software → Military affairs | 
| SIOD | Scoren Is Ons Doel | In Dutch | → Organizations and associations → Sport, physical exercises | 
| SIOD | Sociale Inlichtingen en Opsporingsdienst | In Dutch | |
| SIOgim | System Internetowy Olimpiady Gimnazjalistów | In Polish | → Internet → Computer science |