| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| SDia | Seminars in Dialysis | In English | → Serial publications, periodicals → Pathology  | 
| SDIF | Software Development and Integration Facility | In English | → Software | 
| SDIF | Sony Digital Interface Format | In English | → Music → Acoustical engineering  | 
| SDIL | Spacecraft DCD Interface Logic | In English | → Human-computer interaction → Astronautics  | 
| SDIO | Strategic Defense Initiative Organization | In English | → Organizations and associations → Military affairs → Polemology  | 
| SDIO | Strategic Defense Initiative Office | In English | → Military affairs | 
| SDIP | Strategic Defense Initiative Program | In English | → Military affairs | 
| SDK | Software Development Kit | In English | → Software | 
| SDL | System Description Language | In English | → Programming languages | 
| SDL | Simple Directmedia Layer | In English | → Software | 
| SDL | SAIL Difference List | In English | |
| SDL | Scenario Description Language | In English | |
| SDL | Software Development Laboratory | In English | → Research institutes → Software  | 
| SDL | Software Development Library | In English | → Software | 
| SDL | Standard Distribution List | In English | |
| SDL | System Design Language | In English | |
| SDLP | Social Democratic and Labour Party = PSDLO | Páirtí Sóisialta Daonlathach an Lucht Oibre | In Irish  | 
In English | → Political parties and movements | 
| SDLV | Shuttle-Derived Launch Vehicle | In English | → Astronautics | 
| SDM | Security Document Management | In English | → Knowledge management | 
| SDM | Shuttle Data Management | In English | → Data → Astronautics  | 
| SDM | Shuttle Definition Manual | In English | → Astronautics | 
| SDM | Subsystem Design Manual | In English | |
| SDM | System Definition Manual | In English | |
| SDMB | Shuttle Discrepancy Management Board | In English | → Astronautics | 
| SDMI | Secure Digital Music Initiative | In English | → Organizations and associations → Artistic property → Music  | 
| SDMS | Shuttle Data Management System | In English | → Astronautics | 
| SDN | Safety Discrepancy Notice | In English | → Accidents, risks, safety | 
| SDN | Software Development Note | In English | → Software | 
| SDNS | Secure Data Network System | In English | → Data → Networks, communication  | 
| SDOF | Single Degree of Freedom | In English | → Mechanical engineering | 
| SDOPS | Strategic Defense Operational Planning Support | In English | → Military affairs | 
| SDP | Sensor Data Processing | In English | → Data processing → Electronics  | 
| SDP | Shuttle Data Processor | In English | → Data → Astronautics  | 
| SDP | Site Data Processor | In English | → Data | 
| SDP | Software Development Plan | In English | → Software | 
| SDP | Standard Data Processor | In English | → Computer hardware | 
| SDP | Strategic Defense Program | In English | → Military affairs → Military engineering  | 
| SDP | Subsystem Development Plan | In English | |
| SDPC | Shuttle Data Processing Complex | In English | → Data processing → Astronautics  | 
| SDPLV | Shuttle-Derived-Propellant Launch Vehicle | In English | → Astronautics | 
| SDQA | Space Division Quality Assurance | In English | → Quality management → Astronautics  | 
| SDR | Sensor Data Record | In English | → Records management → Data  | 
| SDR | Serial Data Receiver | In English | → Data | 
| SDR | Series Dissipating Regulator | In English | |
| SDR | Software Design Requirement | In English | → Software | 
| SDR | Software Design Review | In English | → Software | 
| SDR | Spacelab Disposition Record | In English | → Records management → Astronautics  | 
| SDR | Storage Data Register | In English | → Data | 
| SDR | System Design Review | In English | |
| SDR | Systems Definitions Review | In English | |
| SDR | Special Drawing Right | In English | → Finance | 
| SDRAM | Synchronous Dynamic Random Access Memory | In English | → Memories | 
| SDRB | Software Design Review Board | In English | → Software | 
| SDRC | Structural Dynamics Research Corporation | In English | → Physics → Mechanical engineering  | 
| SDRE | Steroid-Dependent Regulatory Element | In English | → Biochemistry, biophysics | 
| SDRL | Subcontract(or) Data Requirements List | In English | → Contract law | 
| SDRS | Shuttle Display Reconfiguration System | In English | → Human-computer interaction → Astronautics  | 
| SDS | Sisters of the Divine Saviour | In English | → Roman catholic church | 
| SDS | Satellite Data System | In English | → Data → Astronautics  | 
| SDS | Strategic Defense System | In English | → Military engineering | 
| SDS | Scientific Data System | In English | → Data | 
| SDS | Shuttle Dynamic Simulation | In English | → Astronautics | 
| SDS | Shuttle Dynamic Simulator | In English | → Astronautics | 
| SDS | Simulation Data Subsystem | In English | → Computer simulation | 
| SDS | Smoke Detector System | In English | |
| SDS | Software Design Specification | In English | → Software | 
| SDS | Space Defense System | In English | → Military engineering → Astronautics  | 
| SDS | Steering and Damping Subsystem | In English | |
| SDS-PAGE | Sodium Dodecylsulfate-Polyacrimide Gel Electrophoresis | In English | → Biological sciences | 
| SDSA | Synthesis-Dependant Strand Annealing | In English | → Genetics | 
| SDSC | Strategic and Defence Studies Centre | In English | → Military affairs | 
| SDSC | San Diego Supercomputing Center | In English | → Computer science | 
| SDSS | Sloan Digital Sky Survey | In English | → Astronomy | 
| SDSS | South Delta Secondary School | In English | → Education | 
| SDSS | Space Division Shuttle Simulator | In English | → Astronautics | 
| SDT | Shuttle Data Tape | In English | → Data → Astronautics  | 
| SDT | Structural Dynamic Test | In English | → Mechanical engineering | 
| SDTA | Structural Dynamic Test Article | In English | → Mechanical engineering | 
| SDTS | Satellite Data Transmission System | In English | → Astronautics → Telecommunications  | 
| SDV | Shuttle-Derived Vehicle | In English | → Astronautics | 
| SDV | Screening Distance Value | In English | |
| SDVF | Software Development and Verification Facility | In English | → Software | 
| SE | Survivability-Endurance | In English | |
| SE | Support Equipment | In English | |
| SE | System Effectiveness | In English | |
| SE | System Element | In English | |
| SE | System Evaluator | In English | |
| SE | Systems Engineering | In English | → Engineering, technology | 
| SE | Software Engineering | In English | → Software | 
| Se | Selenium = Se | Sélénium | In French = Se | Selenium | In Afrikaans = Se | سيلينيوم | In Arabic = Se | Селен | In Belarusian = Se | Селен | In Bulgarian = Se | সেলেনিয়াম | In Bengali = Se | Selen | In Bosnian = Se | Seleni | In Catalan = Se | Seleniu | In Corsican = Se | Selen | In Czech = Se | Selen | In Danish = Se | Selen | In German = Se | Σελήνιο | In Greek = Se | Seleno | In Esperanto = Se | Selenio | In Spanish = Se | Seleen | In Estonian = Se | سلنیوم | In Persian = Se | Seleeni | In Finnish = Se | Seleni | In Friulian = Se | Selenio | In Galician = Se | סלניום | In Hebrew = Se | सेलेनियम | In Hindi = Se | Selenij | In Croatian = Se | Selenyòm | In Haitian Creole = Se | Szelén | In Hungarian = Se | Սելեն | In Armenian = Se | Selenium | In Indonesian = Se | Selenio | In Ido = Se | Selen | In Icelandic = Se | Selenio | In Italian = Se | セレン | In Japanese = Se | lurcmu | In Lojban = Se | 셀레늄 | In Korean = Se | Selenium | In Latin = Se | Selen | In Letzeburgesh = Se | Selenas | In Lithuanian = Se | Selēns | In Latvian = Se | Селен | In Macedonian = Se | सेलेनियम | In Marathi = Se | Selen | In Low German = Se | Seleen | In Dutch = Se | Selen | In Nynorsk = Se | Selen | In Norwegian = Se | Selèni | In Occitan = Se | Selen | In Polish = Se | Selênio | In Portuguese = Se | Silinyu | In Quechua = Se | Seleniu | In Romanian = Se | Селен | In Russian = Se | Sileniu | In Sicilian = Se | Selen | In Serbo-Croatian = Se | Selen | In Slovenian = Se | Селен | In Serbian = Se | Selen | In Swedish = Se | Seleni | In Swahili = Se | செலீனியம் | In Tamil = Se | ซีลีเนียม | In Thai = Se | Selenyum | In Turkish = Se | Селен | In Ukrainian = Se | Selen | In Uzbek = Se | 硒 | In Chinese = Se | Selen | In Azerbaijani = Se | Seleniwm | In Welsh = Se | Selenio | In Basque = Se | Seiléiniam | In Irish = Se | Shellainium | In Manx = Se | Selenium | JV = Se | ಸೆಲೆನಿಯಮ್ | In Kannada = Se | സെലീനിയം | In Malayalam = Se | Selén | In Slovak = Se | Selen | In Vietnamese  | 
In English | → Chemistry | 
| SE&A | System Engineering and Analysis | In English | → Engineering, technology | 
| SE&I | Systems Engineering and Integration | In English | → Engineering, technology | 
| SE&TD | System Engineering and Technical Direction | In English | → Engineering, technology | 
| SE/FAC | Support Equipment Facility | In English | |
| SEa | Sociology of Education Association | In English | → Associations → Sociology → Education  | 
| SEA | Samsø Energy Agency | In English | → Energy economics | 
| SEA | Slovak Energy Agency | In English | → Energy economics → Slovakia  | 
| SEA | Statistical Energy Analysis | In English | → Physics | 
| SEA | Scanning Electrostatic Analysis | In English | |
| SEA | Silicon Elastometer Ablator | In English | |
| SEA-EAT | South-East Asia Earthquake and Tsunami Blog | In English | → Seismology, earthquakes | 
| SeAc | Sensors and Actuators | In English | → Serial publications, periodicals → Electrical engineering → Electronics  | 
| SEACAM | Secretariat for Eastern African Coastal Area Management | In English | → International relations → 5023 → Environmental technology, water supply, waste management → Africa  | 
| SEACF | Support Equipment Assembly and Checkout Facility | In English | → Mechanical engineering | 
| SEACSN | Southeast Asian Conflict Studies Network | In English | → Organizations and associations → Polemology  | 
| SEADS | Shuttle Entry Air Data Sensor | In English | → Astronautics | 
| SEAGA | Selective Employment of Airborne and Ground Alert | In English | |
| SEAHTP | South East Asian Historical Texts Project | In English | → Libraries → Language, linguistics, literature → History  | 
| SEAID | Support Equipment Abbreviated Items Description | In English | |
| SEAiT | Southeast Asian Images and Text | In English | → Libraries → Area studies  | 
| SEAL | Semantics-directed Environment Adaptation Language | In English | → Programming languages | 
| SEAL | Software-Optimized Encryption Algorithm | In English | → Software → Algorithms  | 
| SEAL | Safety Evidence Assurance Level | In English | → Accidents, risks, safety | 
| SEAL | Sea Scout Advanced Leadership | In English | → Organizations and associations | 
| SEAL | Software Engineering and Ada Lab(oratory) | In English | → Research institutes → Software  | 
| SEAM | Southeast Asia Microform Project | In English | → Libraries → Area studies  | 
| SEAM | System Engineering and Analysis Management | In English | → Management → Engineering, technology  | 
| SEAMEO | Southeast Asian Ministers of Education Organization | In English | → International relations → Central administration → Education  | 
| SEAP | Southeast Asia Program | In English | → Higher education, universities → Area studies  | 
| SEAP | Southeast Asia Publications | In English | → Serial publications, periodicals → Area studies  | 
| SEAPG | Support Equipment Acquisition Planning Group | In English | → Maintenance and logistics | 
| SEAR | South East Asia Research | In English | → Serial publications, periodicals → Area studies  | 
| SEARC | Southeast Asia Research Centre City | In English | |
| SEARO | South-East Asia Regional Office | In English | |
| SEARP | South-East Asia Rainforest Research Programme | In English | → Ecology | 
| SEAS | School of East Asian Studies | In English | → Higher education, universities → Area studies  | 
| SEAS | School of Engineering and Applied Sciences | In English | → Specialized or polytechnical colleges → Engineering, technology  | 
| SEASIM | System Element Attrition Simulation | In English | |
| SEASREP | Southeast Asian Studies Regional Exchange Programme | In English | → Education → Area studies  | 
| SEASSI | Southeast Asian Studies Summer Institute | In English | → Area studies | 
| SEATO | Southeast Asia Treaty Organization | In English | → Organizations and associations → International relations  | 
| SEATO | South-East Asia Treaty Organization | In English | → Organizations and associations → International relations  | 
| SEB | Scientific Equipment Bay | In English | |
| SEB | Source Evaluation Board | In English | |
| SEB | Support Equipment Building | In English | |
| SEB | Systems Engineering Branch | In English | → Engineering, technology | 
| SEBIS | Semantics in Business Information Systems | In English | → Knowledge management → Semiotics  | 
| SEC | Securities and Exchange Commission | In English | → Telecommunications | 
| SEC | Sigma Energy Consulting | In English | → Energy economics → Consulting  | 
| SEC | Sequential Events Controller | In English | |
| SEC | Source Evaluation Committee | In English | |
| SEC | Split Expander Cycle | In English | |
| SECAAS | Southeast Conference of the Association for Asian Studies | In English | → Associations → Area studies  | 
| SECB | Scientific Engineering Centre Biomass | In English | |
| SECI | South East European Co-operative Initiative | In English | → International relations | 
| SECIS | SElenoCysteine Insertion Sequence | In English | → Genetics → Biochemistry, biophysics  | 
| SECM | Science and Engineering of Composite Materials | In English | → Serial publications, periodicals → Materials science  | 
| SECO | Sustainer Engine Cutoff | In English | → Vehicle engineering | 
| SECO | State Secretariat for Economic Affairs | In English | → Economics → Central administration → 33972  | 
| SECOQC | Secure Communication based on Quantum Cryptography | In English | → Telecommunications → Quantum mechanics  | 
| SECOR | Sequential Collation Or Range | In English | |
| SECS | Sequential Events Control System | In English | |
| SECS | Shuttle Events Control Subsystem | In English | → Astronautics | 
| SECS | Simulation/Experiment Control System | In English | |
| SED | Space Engineering Document | In English | → Astronautics | 
| SED | Surface-conduction Electron-emitting Display | In English | → Electronics | 
| SedG | Sedimentary Geology (www.elsevier.com/locate/sedgeo) | In English | → Serial publications, periodicals → Earth sciences  | 
| Sedim | Sedimentology | In English | → Serial publications, periodicals → Earth sciences  | 
| SEDR | Systems Engineering Department Report | In English | → Engineering, technology | 
| SEE | Secondary Electron Emission | In English | |
| SEE | Software Engineering Exercise | In English | → Software | 
| SEE | Software Equality Evaluation | In English | → Software | 
| SEE-ECN | South East Europe Education Cooperation Network | In English | |
| SEEA | Serbian Energy Efficiency Agency | In English | → Energy economics | 
| SEEC | Scottish Energy and Environment Conference | In English | → Organizations and associations → Environmental protection → Energy economics → United Kingdom  | 
| SEECP | South East Europe Co-operation Process | In English | → International relations | 
| SEECR | Southeastern Early China Roundtable | In English | → History → China  | 
| SEEDS | Subarctic ocean Enrichment and Ecosystem Dynamics Study | In English | → Ecology → Marine research, oceanography  | 
| SEEJ | Society of Environmental Engineers Journal | In English | → Serial publications, periodicals → Threats to the environment → Environmental technology, water supply, waste management  | 
| SEEMO | South East Europe Media Organisation | In English | → Newspapers, journalism | 
| SEER | Scholars Engaged in Electronic Resources | In English | → Libraries | 
| SEER | Sensor Experimental Evaluation and Review | In English | |
| SEERC | South East European Research Centre | In English | → Research institutes | 
| SEF | Space Environmental Facility | In English | → Astronomy → Astronautics  | 
| SEF | Singapore Epilepsy Foundation (www.epilepsy.com.sg) | In English | → Foundations → Neurology  | 
| SEG | Society of Economic Geologists | In English | → Organizations and associations → Economic geology  | 
| SEG | Simulation Engineering Group | In English | → Computer simulation → Engineering, technology  | 
| SEG | System Engineering Ground Rule | In English | |
| SEGeo | Seismology and Exploration Geophysics | In English | → Serial publications, periodicals → Geophysics → Seismology, earthquakes  | 
| SEHK | Stock Exchange Hong Kong | In English | → Financial markets | 
| SEI | Space Exploration Initiative | In English | |
| SEI | Software Engineering Institute | In English | → Software | 
| SEI | Seller End Item | In English | |
| SEI | Support Equipment Installation | In English | → Maintenance and logistics | 
| SEICO | Support Equipment Installation and Checkout | In English | → Maintenance and logistics | 
| SEINIT | Security Expert INITiative | In English | |
| SEIS | Shuttle Experiments Integration Support | In English | → Astronautics | 
| SEIS | Spacelab Experiments Integration Support | In English | → Astronautics | 
| SEIS | Standard End Item Specification | In English | |
| SEIST | System Engineering, Integration, and Support Team | In English | → Engineering, technology | 
| SEIT | System Engineering, Integration, and Test | In English | → Engineering, technology | 
| SEKT | Semantic Knowledge Technologies | In English | → Computer-based techniques → Semiotics  | 
| SEL | Systems Electronics Laboratory | In English | → Research institutes → Electronics  | 
| SEL | Systems Engineering Laboratories | In English | → Research institutes → Engineering, technology  | 
| SEM | SEmantic Memory | In English | → Software → Semiotics  | 
| SEM | Space Environment Monitor | In English | |
| SEM | Scanning Electron Microscope | In English | |
| SEM | Seller's Engineering Memo | In English | |
| SEM | Shuttle Experiment Module | In English | → Astronautics | 
| SEM | Space Environment Monitoring | In English | → Astronomy → Astronautics  |