

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| SSD | Société de Services Décentralisée | In French | |
| SSD | Satellite Services Division | In English | → Astronautics | 
| SSD | Solid State Drive | In English | → Computer hardware | 
| SSDAC | Space Station Data Acquisition and Control | In English | → Data → Astronautics | 
| SSDB | Spin System Distribution Box | In English | |
| SSDD | Software System Design Document | In English | → Software | 
| SSDF | Space Science Development Facility | In English | → Astronomy → Astronautics | 
| SSDF | South Sudan Defense Force | In English | → Military affairs | 
| SSDH | Subsystem Data Handbook | In English | |
| SSDO | Steady-State Design and Optimization Code | In English | |
| SSDS | Space Station Data System | In English | → Data → Astronautics | 
| SSDS | Scheveningen Sterker Door Samenwerking | In Dutch | → Organizations and associations → Sport, physical exercises → Netherlands | 
| SSDSAS | Space Station Data System Architecture Study | In English | → Computer hardware → Data → Astronautics | 
| SSDT | System Service Dispatch Table | In English | → Operating systems | 
| SSE | Shanghai Stock Exchange | In English | → Financial markets | 
| SSE | Shenzhen Stock Exchange | In English | → Financial markets | 
| SSE | Software Support Environment | In English | → Software | 
| SSE | System Security Engineering | In English | |
| SSE | Software Support Equipment | In English | → Software | 
| SSE | Sortie Support Equipment | In English | |
| SSE | Space Shuttle Engine | In English | → Astronautics | 
| SSE | Space Support Equipment | In English | → Astronautics | 
| SSE | Spacecraft Simulation Equipment | In English | → Astronautics | 
| SSE | System Safety Engineering | In English | → Accidents, risks, safety | 
| SSE | Stredoslovenská energetika (www.sse.sk) | In Slovak | → Energy economics → Slovakia | 
| SSE | Sportclub Someren Eind | In Dutch | → Organizations and associations → Sport, physical exercises | 
| SSEAL | South/Southeast Asia Library | In English | → Libraries → Area studies | 
| SSEASR | South and Southeast Asian Association for the Study of Religion | In English | → Associations → Religion, theology | 
| SSEDF | Software Support Environment Development Facility | In English | → Software | 
| SSEle | Solid State Electronics | In English | → Serial publications, periodicals → Physics | 
| SSELP | Sinological Serials in European Libraries Project | In English | → Libraries → Serial publications, periodicals → Linguistics | 
| SSEM | System Security Engineering Manager | In English | |
| SSENR | Schéma de Service des Espaces Naturels et Ruraux | In French | → Environmental protection | 
| SSEOS | Space Shuttle Engineering and Operations Support | In English | → Astronautics | 
| SSEOS | Space Station External Operations Simulator | In English | → Astronautics | 
| SSEP | System Security Engineering Phase | In English | |
| SSEP | System Security Engineering Plan | In English | |
| SSEp | Springer Verlag Springer Series on Electrophysics | In English | → Serial publications, periodicals → Electricity, magnetism, electromagnetism | 
| SSES | Software System Environment System | In English | → Software | 
| SSETI | Student Space Exploration and Technology Initiative | In English | → Astronautics → Specialized or polytechnical colleges → Higher education, universities | 
| SSF | Space Station Freedom | In English | → Astronautics | 
| SSF | Sveriges Segelfartygsförening | In Swedish | → Organizations and associations → Transport and postal services → Sweden | 
| SSF | SRB Storage Facility | In English | |
| SSF | Sécurité Sans Frontières | In French | → Military affairs | 
| SSFCS | Space Shuttle Flight Control System | In English | → Astronautics | 
| SSFGSS | Space Shuttle Flight and Ground System Specification | In English | → Astronautics | 
| SSFL | Santa Susana Field Laboratory | In English | → Research institutes → Astronautics | 
| SSFN | Space Station Flight Network | In English | → Astronautics | 
| SSFP | Space Station Freedom Program | In English | → Astronautics | 
| SSFS | Space Shuttle Functional Simulation | In English | → Astronautics | 
| SSG | Sensor Systems Group | In English | |
| SSGDAC | Space Station Guidance, Dynamics, And Control | In English | → Astronautics | 
| SSGM | State, Society and Governance in Melanesia | In English | → Sociology → Area studies | 
| SSGSR | Springer Verlag Springer Series on Group Geophysics Space Research | In English | → Serial publications, periodicals → Geophysics → Astronomy | 
| SSH | Secure Shell | In English | → Networks, communication | 
| SSH | Sisters of the Sacred Heart | In English | → Roman catholic church | 
| SSH | Simulation Support Hardware | In English | → Computer hardware → Computer simulation | 
| SSH | Slobodarska Stranka Hrvatske | In Croatian | → Political parties and movements | 
| SSH | Sea Surface Height | In English | → Marine research, oceanography | 
| SSHA | Social Science History Association | In English | → Associations → Social sciences → History | 
| SSHA | Shuttle System Hazard Analysis | In English | → Astronautics | 
| SSHA | Subsystem Hazard Analysis | In English | |
| SSHB | Station Set Handbook | In English | |
| SSHMP | Sources and Studies in the History of Mathematics and Physical Sciences | In English | → Serial publications, periodicals → Mathematics → Physics → History | 
| SSI | Statens Serum Institut | In Danish | → Research institutes → Biological sciences → Immunology and allergy → Denmark | 
| SSI | Solid State Imaging | In English | |
| SSI | Server Side Includes | In English | → Networks, communication | 
| SSI | Système de Surveillance International | In French | → International relations | 
| SSI | Space Science Instrumentation | In English | → Serial publications, periodicals → Astronomy | 
| SSI | San Salvador Island | In English | → Geography | 
| SSI | Sector Scan Indicator | In English | |
| SSI | Significant Structural Item | In English | |
| SSI | Space Segment Integration | In English | → Astronautics | 
| SSI | Système de Sécurité Incendie | In French | → Firefighting | 
| SSI | Sécurité du Système d'Information | In French | → Computer science | 
| SSIAD | Système de Soins Infirmiers À Domicile | In French | → Medicine | 
| SSIBD | Shuttle System Interface Block Diagram | In English | → Human-computer interaction → Astronautics | 
| SSIC | Selangor State Investment Centre | In English | → 33972 | 
| SSID | Service Set Identifier | In English | → Networks, communication | 
| SSIDONI | Serveur d'Informations et de DONnées sur l'Informatique industrielle | In French | → Software | 
| SSIE | Société Suisse pour l'Informatique dans l'Enseignement (www.svia-ssie.ch) = SVIA | Schweizerischer Verein für Informatik in der Ausbildung | In German = SSII | Società Svizzera per l'Informatica nell'Insegnamento | In Italian | In French | → Organizations and associations → Computer science → Education → Switzerland | 
| SSIE | Smithsonian Science Information Exchange | In English | → Mathematics and natural sciences | 
| SSII | Service Sector Innovation Index | In English | |
| SSII | Société de Services en Ingéniérie Informatique | In French | → Computer science | 
| SSII | Società Svizzera per l'Informatica nell'Insegnamento (www.svia-ssie.ch) = SSIE, SVIA (look above) | In Italian | → Organizations and associations → Computer science → Education → Switzerland | 
| SSIM | Standard Schedules Information Manual | In English | → Standardization → Data → Transport by air → Tourism | 
| SSIon | Solid State Ionics | In English | → Serial publications, periodicals → Physics | 
| SSIP | Shuttle Student Involvement Project | In English | → Specialized or polytechnical colleges → Higher education, universities → Astronautics | 
| SSIP | System Software Interface Processing | In English | → Software → Human-computer interaction | 
| SSIS | Space Station Information System | In English | → Knowledge management → Astronautics | 
| SSISS | Società Svizzera degli Insegnanti delle Scuole Secondarie (www.vsg-sspes.ch) = VSG | Verein schweizerischer Gymnasialehrerinnen und Gymnasiallehrer | In German = SSPES | Societé Suisse des Professeurs de l'Enseignement Secondaire | In French | In Italian | → Organizations and associations → Education → Sport, physical exercises → Switzerland | 
| SSIT | MIT's Student Services Information Technology | In English | → Computer science | 
| SSIT | Système de Surveillance des Incidents Transfusionnels | In French | → Blood and circulatory system | 
| SSITP | Shuttle System Integrated Test Plan | In English | → Astronautics | 
| SSJR | Society for the Study of Japanese Religions | In English | → Organizations and associations → 22 | 
| SSKK | Starptautiskā Sarkanā Krusta Komiteja (www.icrc.org) = CICR | Comité Internacional de la Cruz Roja | In Spanish = ICRC | International Committee of the Red Cross | In English = CICR | Comité International de la Croix-Rouge | In French = CICV | Comitê Internacional da Cruz Vermelha | In Portuguese = МККК | Международный комитет Красного Креста | In Russian = CICR | Comitato Internazionale della Croce Rossa | In Italian = ICRC | 적십자 국제 위원회 | In Korean = CICR | Comitè Internacional de la Creu Roja | In Catalan = CICR | Comitât entèrnacionâl de la Crouèx-Roge | In Franco-Provençal | In Latvian | → Organizations and associations → Medicine | 
| SSKP | Salpausselän kennelpiiri | In Finnish | |
| SSKP | Single-Shot Kill Probability | In English | |
| SSKS | Szovjet Szocialista Köztársaságok Szövetsége = URSS | Unaniezh ar Republikoù Sokialour Soviedel | In Breton = URSS | Union des Républiques Socialistes Soviétiques | In French = USSR | Unie van Sosialistiese Sowjetrepublieke | In Afrikaans = USSR | Union of Soviet Socialist Republics | In English = СССР | Сою́з Сове́тских Социалисти́ческих Респу́блик | In Russian = CCCP | Съюзът на съветските социалистически републики | In Bulgarian = SSSR | Soyuz Sovetskikh Sotsialisticheskikh Respublik | In Russian = URSS | Unión de Republicas Sozialistas Sobieticas | In Aragonese = XRSS | Xunión de les Repúbliques Socialistes Soviétiques | In Asturian = SSRİ | Sovet Sosialist Respublikaları İttifaqı | In Azerbaijani = TSRS | Tarybu Socialistiniu Respubliku Sajunga | In Baltic languages = SSSR | Savez Sovjetskih Socijalističkih Republika | In Serbo-Croatian = URSS | Unió de Repúbliques Socialistes Soviètiques | In Catalan = SSSR | Svaz sovětských socialistických republik | In Czech = USSR | Unio de Sovetaj Socialismaj Respublikoj | In Esperanto = CCCP | Социаллă Совет Республикисен Союзĕ | In Chuvash = USSR | Unionen af Socialistiske Sovjetrepublikker | In Danish = URSS | Unione delle Repubbliche Socialiste Sovietiche | In Italian = ZSRR | Związek Socjalistycznych Republik Radzieckich | In Polish = UdSSR | Union der Sozialistischen Sowjetrepubliken | In German = ΕΣΣΔ | Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών | In Greek = URSS | Unión de Repúblicas Socialistas Soviéticas | In Spanish = NSVL | Nõukogude Sotsialistlike Vabariikide Liit | In Estonian = SESB | Sobietar Errepublika Sozialisten Batasuna | In Basque = USSR | Uny fan Sosjalistyske Sowjetrepublyken | In Frisian = ԽՍՀՄ | Խորհրդային Սոցիալիստական Հանրապետությունների Միություն | In Armenian = URSS | Unión das Repúblicas Socialistas Soviéticas | In Galician = სსრკ | საბჭოთა სოციალისტური რესპუბლიკების კავშირი | In Georgian = URSS | Unio Rerum Publicarum Socialisticarum Sovieticarum | In Latin = CCPC | Советтик Социалисттик Республикалар Союзу | In Kirghiz = UdSSR | Unioun vun de Sozialistesche Sowjetrepubliken | In Letzeburgesh = PSRS | Padomju Sociālistisko Republiku Savienība | In Latvian = СССР | Сојуз на Советските Социјалистички Републики | In Macedonian = УРСС | Униуня Републичилор советиче Сочиалисте | In Moldavan = KRSS | Kesatuan Republik Sosialis Soviet | In Malay = USSR | Unie van Socialistische Sovjetrepublieken | In Dutch = SSSR | Sambandet av Sosialistiske Sovjet-Republikkar | In Nynorsk = SSSR | Samveldet av sovjetiske sosialistrepublikker | In Norwegian = URSS | Unnion d'Républyiques Socialistes Soviétiques | In Norman = URSS | União das Repúblicas Socialistas Soviéticas | In Portuguese = URSS | Union de las Republicas Socialistas Sovieticas | In Occitan = SSRH | Susyalista Suwit Republikakunap Huñun | In Quechua = ССРЦ | Советон Социалистон Республикæты Цæдис | In Ossetian = URSS | Uniunea Republicilor Sovietice Socialiste | In Romanian = URSS | Unioni dî ripùbblichi sucialisti suviètichi | In Sicilian = ZSSR | Zveza sovjetskih socialističnih republik | In Slovenian = СССР | Савез Совјетских Социјалистичких Република | In Serbian = SSCB | Sovyet Sosyalist Cumhuriyetler Birliği | In Turkish = СРСР | Союз Радянських Соціалістичних Республік | In Ukrainian = SSRB | Sovet Sosialistik Republiklar Berlege | In Tatar = SSRI | Sovet Sotsialistik Respublikalar Ittifoqi | In Uzbek | In Hungarian | → International relations → Geography | 
| SSL | Secure Socket Layer | In English | → Networks, communication | 
| SSL | Secure Sockets Layers | In English | → Networks, communication | 
| SSL | Site Support List | In English | |
| SSL | System Software Loader | In English | → Software | 
| SSL | System Specification Language | In English | |
| SSLV | Standard Small Launch Vehicle | In English | → Astronautics | 
| SSM | Satellite Survivability Model | In English | → Astronautics | 
| SSM | Spacecraft System Monitor | In English | → Human-computer interaction → Astronautics | 
| SSM | Surface-to-Surface Missile | In English | → Military engineering | 
| SSM/I | Special Sensor Microwave/Imager (www.ssmi.com) | In English | → Astronautics → Earth sciences | 
| SSMB | Space Shuttle Maintenance Baseline | In English | → Maintenance and logistics → Astronautics | 
| SSMC | Space Shuttle MIssion Control | In English | → Astronautics | 
| SSME | Space Shuttle Main Engine | In English | → Astronautics | 
| SSMEC | Space Shuttle Main Engine Controller | In English | → Astronautics | 
| SSMECA | Space Shuttle Main Engine Controller Assembly | In English | → Astronautics | 
| SSMI | Service de Sécurité du Ministère de l'Intérieur | In French | → Police → Central administration | 
| SSML | Speech Synthesis Markup Language | In English | → Programming languages → Data | 
| SSMS | Society for Sexual Medicine of Slovenia | In English | → Organizations and associations → Sexual problems → Urology → Applied sciences, technology | 
| SSMS | Summer School on Multimedia Semantics | In English | → Computer-based techniques → Semiotics | 
| SSMS | Société Suisse de Médecine du Sport (http://sgsm-ssms.ch) = SGSM | Schweizerische Gesellschaft für Sportmedizin | In German | In French | → Organizations and associations → Medicine → Sport, physical exercises → Switzerland | 
| SSMS | Servicio de Salud Metropolitano Sur | In Spanish | → Medicine | 
| SSMS | Singaporean Society for Mass Spectrometry | In English | → Organizations and associations → Chromatography, mass spectrography | 
| SSMS | Seven Springs Middle School | In English | → Education | 
| SSMS | Stockholm Single Malt Society = SSMS | Stockholms Single Malt Sällskap | In Swedish | In English | → Organizations and associations → Beverage industry → Sweden | 
| SSMS | Stockholms Single Malt Sällskap = (look above) | In Swedish | → Organizations and associations → Beverage industry → Sweden | 
| SSMS | Sessional Staff Management System | In English | → Personnel management | 
| SSMS | SQL Server Management Studio | In English | → Networks, communication → Data | 
| SSMTF | Space Station Man-Systems Training Facility | In English | → Education → Astronautics | 
| SSMTF | Space Station Mockup and Trainer Facility | In English | → Astronautics | 
| SSN | Social Security Number | In English | → Insurance | 
| SSNMR | Solid State Nuclear Magnetic Resonance | In English | → Serial publications, periodicals → Physics | 
| SSO | Spurious Shut-off | In English | |
| SSO | Société Suisse d'Odonto-stomatologie | In French | → Organizations and associations → Medicine → Switzerland | 
| SSO | Single Sign On | In English | → Networks, communication | 
| SSO | Single Sign-On | In English | → Software | 
| SSO | Safety Signification Operation | In English | → Accidents, risks, safety | 
| SSO | Space Shuttle Orbiter | In English | → Astronautics | 
| SSO | System Security Officer | In English | |
| SSO | Systems Software Office | In English | → Software | 
| SSO | Student Station Occupancy | In English | → Higher education, universities | 
| SSO | Special Security Office | In English | → Military affairs | 
| SSODB | Space Station Operational Data Book | In English | → Astronautics | 
| SSODC | Steady-State Off-Design Code | In English | |
| SSOP | Space Systems Operating Procedure | In English | → Astronautics | 
| SSOS | Springer Verlag Springer Series on Optical Sciences | In English | → Serial publications, periodicals → Optics | 
| SSP | Scholarly Societies Project | In English | |
| SSP | Society of Saint Paul | In English | → Roman catholic church | 
| SSP | Scottish Socialist Party (www.scottishsocialistparty.org) = PSA | Pàrtaidh Shòisealach na h-Alba | In Scottish Gaelic | In English | → Socialist parties → United Kingdom | 
| SSP | Security System Plan | In English | |
| SSP | Small Sortie Payload | In English | → Astronautics | 
| SSP | Space Shuttle Program | In English | → Astronautics | 
| SSP | Space Station Program | In English | → Astronautics | 
| SSP | Standard Switch Panel | In English | → Software | 
| SSP | Subsolar Point | In English | → Astronomy → Astronautics | 
| SSP | System Security Plan | In English | |
| SSP | Supplementary Special-purpose Plane | In English | → Data | 
| SSPAR | Solid State Physics Advances in Research and Applications | In English | → Serial publications, periodicals → Physics | 
| SSPAS | Solid State Physics Advances in Research and Applications Supplement | In English | → Serial publications, periodicals → Physics | 
| SSPC | (Missionary) Sisters of Saint Peter Claver | In English | → Roman catholic church | 
| SSPC | Spacelab Stored Program Command | In English | → Astronautics | 
| SSPD | Shuttle System Payload Data | In English | → Astronautics | 
| SSPD | Shuttle System Payload Definition | In English | → Astronautics | 
| SSPD | Shuttle System Payload Description | In English | → Astronautics | 
| SSPDA | Space Shuttle Payload Data Activity | In English | → Astronautics | 
| SSPDB | Subsystem Power Distribution Box | In English | → Electrical engineering | 
| SSPDS | Space Shuttle Payload Data Study | In English | → Astronautics | 
| SSPE | Subakut sklerosierende Panenzephalitis | In German | → Neurology | 
| SSPE | Space Station Program Element | In English | → Astronautics | 
| SSPES | Societé Suisse des Professeurs de l'Enseignement Secondaire (www.vsg-sspes.ch) = SSISS, VSG (look above) | In French | → Organizations and associations → Education → Sport, physical exercises → Switzerland | 
| SSPF | Sortie Software Production Facility | In English | → Astronautics | 
| SSPF | Space Shuttle Programming Facility | In English | → Software → Astronautics | 
| SSPF | Space Station Processing Facility | In English | → Astronautics | 
| SSPFA | Space Shuttle Program Flight Assignment | In English | → Astronautics | 
| SSPGSE | Space Shuttle Program Ground Support Equipment | In English | → Astronautics | 
| SSPh | Société Suisse des Pharmaciens (www.pharmasuisse.org/fr/) = SAV | Schweizer Apothekerverband | In German | In French | → Organizations and associations → Pharmacology, toxicology → Switzerland | 
| SSPHS | Society for Spanish and Portuguese Historical Studies | In English | → Organizations and associations → History | 
| SSPII | Space Shuttle Program Implementing Instruction | In English | → Astronautics | 
| SSPM | Software Standards and Procedures Manual | In English | → Software | 
| SSPM | Solid-State Photomultiplier | In English | |
| SSPM | Space Shuttle Program Manager | In English | → Management → Astronautics | 
| SSPM | Standards and Procedures Manual | In English | → Quality management → Standardization | 
| SSPM | System Safety Program Manager | In English | → Management → Accidents, risks, safety | 
| SSPM | Société Suisse de Pédagogie Musicale (www.sspm.ch) = SMPV | Schweizerischer Musikpädagogischer Verband | In German | In French | → Organizations and associations → Education → Music → Switzerland | 
| SSPM | Société Suisse de Phytothérapie Médicale | In French | → Organizations and associations → Pharmacology, toxicology → Switzerland | 
| SSPO | Space Shuttle Program Office | In English | → Astronautics | 
| SSPO | Space Station Projects Office | In English | → Astronautics | 
| SSPP | Space Station Program Participant | In English | → Astronautics | 
| SSPP | System Safety Program Plan | In English | → Accidents, risks, safety | 
| SSPPM | SPADOC System Performance Prediction Model | In English | |
| SSPPSG | Space Shuttle PAyload Planning Steering Group | In English | → Management → Astronautics | 
| SSPRO | Space Shuttle Program Resident Office | In English | → Astronautics | 
| SSPRv | Space and Solar Power Review | In English | → Serial publications, periodicals → Astronomy → Energy economics | 
| SSPS | (Missionary) Sisters Servants of the Holy Spirit | In English | → Roman catholic church | 
| SSPS | Solar Satellite Power Station | In English | → Energy economics → Astronautics | 
| SSPS | Space Shuttle Program Schedule | In English | → Astronautics | 
| SSPTF | Santa Susana Propulsion Test Facility | In English | → Mechanical engineering | 
| SSR | Sovjetskih Socialističnih Republik = RSS | Repubbliche Socialiste Sovietiche | In Italian = PSR | Padomju Sociālistiskajām Republikām | In Latvian = RSS | Republici Sovietice Socialiste | In Romanian = RSS | Républiques Socialistes Soviétiques | In French | In Slovenian | → 32 → Geography | 
| SSR | Spårvägssällskapet Ringlinien | In Swedish | → Organizations and associations → Transport and postal services | 
| SSR | Shop Support Request | In English | |
| SSR | Software Specification Review | In English | → Software | 
| SSR | Staff Support Room | In English |