| S&P | Standard & Poor’s |
| S&P | Salt and Pepper |
| S&P | Standards and Practices |
| S&P | Soler & Palau |
| S&T | Science and Technology |
| S&T | Sales and Trading |
| S&T | Surf and Turf |
| S&T | Signal and Telegraph |
| S&T | Supply & Transport |
| S-Video | Separate Video |
| S/o | Son of |
| S/O | Sold-Out |
| S/O | Shout-Out |
| S/O | Shipping Order |
| S/O | Significant Other |
| S/O | Security Officer |
| SA8 | Surface Active 8, where 8 represents the eight ingredients in the original formula |
| SAARC | South Asian Association for Regional Cooperation |
| SaaS | Software as a Service |
| SAAS | Student Awards Agency Scotland |
| SAAS | South Australian Ambulance Service |
| SAAS | Seattle Academy of Arts and Sciences |
| SAAS | Student African American Sisterhood |
| SAAS | Société Anonyme des Ateliers de Sécheron |
| SAAS | Sports Association for Adelaide Schools |
| SAC | Services Accounting Code |
| SAC | Symposium on Applied Computing |
| SAC | Santa Ana College |
| SAC | Singapore Accountancy Commission |
| SAC | Special Area of Conservation |
| SAC | Standardization Administration of China |
| SAC | Strategic Air Command |
| SAC | Sacramento Executive Airport |
| SAC | Selected Areas in Cryptography |
| SAC | Superior Art Creations |
| SAC | San Antonio College |
| SAC | California State Prison, Sacramento |
| SAC | Second Artillery Corps |
| SAC | Shenyang Aircraft Corporation |
| SAC | Southern Air Command |
| SAC | South Atlantic Conference |
| SAC | Swiss Alpine Club |
| SAC | Seoul Arts Center |
| SAC | Space Applications Centre |
| SAC | Sveriges Arbetares Centralorganisation |
| SAC | St. Andrew’s College |
| SAC | Senior Aircraftman |
| SAC | Sooner Athletic Conference |
| SAC | Songwriters Association of Canada |
| SAC | Senior Assistant Commissioner |
| SAC | Senior Assistant Commissioner |
| SAC | Scottish Agricultural College |
| SAC | St Aloysius College |
| SAC | Sydney Adventist College |
| SAC | Scottish Arbitration Centre |
| SAC | Society of Arts and Crafts |
| SAD | Seasonal Affective Disorder |
| SAE | Society of Automotive Engineers |
| SAE | System Architecture Evolution |
| SAE | School of Audio Engineering |
| SAE | Supervised Agricultural Experience |
| SAE | Siamese Algae Eater |
| SAE | Serious Adverse Event |
| SAE | Self Addressed Envelope |
| SAE | Scientific Audio Electronics |
| SAEC | Sudan Atomic Energy Commission |
| SAEC | Silicon Alley Entrepreneurs Club |
| SAEC | Sakuntala Ammal Engineering College |
| SAG | Screen Actors Guild |
| SAG | Special Action Group |
| SAG | State Advisory Group |
| SAG | SQL Access Group |
| SAG | Semi-Autogenous Grinding |
| sag | Sango |
| SAG | Securitag Assembly Group |
| SAG-AFTRA | Screen Actors Guild‐American Federation of Television and Radio Artists |
| SAGY | सांसद आदर्श ग्राम योजना |
| SAH | Stay-at-home |
| SAH | Specially Adapted Housing |
| SAH | Society of Architectural Historians |
| SAHM | Stay At Home Mom |
| SAHM | Society for Adolescent Health and Medicine |
| SAI | Statement of Additional Information |
| SAI | Serving Area Interface |
| SAI | Sports Authority of India |
| SAI | Secondary Air Injection |
| SAIC | Science Applications International Corporation |
| SAIC | School of the Art Institute of Chicago |
| SAIC | State Administration for Industry and Commerce |
| SAIC | Shanghai Automotive Industry Corporation |
| SAIC | Special Agent In Charge |
| SAIC | Scottish Aquaculture Innovation Centre |
| SAIC | Single Antenna Interference Cancellation |
| SAIC | South African Indian Congress |
| SAIC | Sociedad Argentina de Investigación Clínica |
| Saifeena | Saif Ali Khan and Kareena Kapoor |
| SAIL | Steel Authority of India Limited |
| SAIL | Shuttle Avionics Integration Laboratory |
| SAIL | Stanford Artificial Intelligence Laboratory |
| SALT | Speech Application Language Tags |
| SAM | Surface To Air Missile |
| SAM | Served Market Share |
| SAMCRO | Sons of Anarchy Motorcycle Club, Redwood Original |
| SAML | Security Assertion Markup Language |
| Saml | Samlingspartiet |
| SAML | Southern Association of Marine Laboratories |
| SAMPA | Speech Assessment Methods Phonetic Alphabet |
| Samsonite | named from the Biblical character Samson, renowned for his strength |
| Samsung | meaning three stars in Korean |
| SAN | Storage Area Network |
| SAN | Senior Advocate of Nigeria |
| SAN | Styrene AcryloNitrile |
| SAN | System Area Network |
| SAN | Subject Alternative Name |
| SAN | South African Navy |
| SAN | South Asian Network |
| SAN | Spinal Accessory Nerve |
| SAN | Servicios Aéreos Nacionales |
| SAN | Sandersville Railroad |
| SAN | Société Aéronautique Normande |
| SAN | Stigma Action Network |
| SANA | Singapore Anti Narcotics Association |
| SANC | South African Native Congress |
| SANDF | South African National Defence Force |
| Sanyo | means three oceans in Japanese |
| SAP | Systeme, Anwendungen, Produkte |
| SAP | Structural Adjustment Programme |
| SAP | Service Access Point |
| SAP | Special Access Program |
| SAP | Standard Assessment Procedure |
| SAP | Socialistisk Arbejderparti |
| SAP | Simplified Acquisition Procedures |
| SAP | South African Police |
| SAP | Ramón Villeda Morales International Airport |
| SAP | Socialdemokratiska Arbetarepartiet |
| SAP | Strategic Advantage Profile |
| SAP | Special Assistance Plan |
| SAP | Socialistische Arbeiderspartij |
| SAP | Socialistische Alternatieve Politiek |
| SAP | Société des Automobiles Pilain |
| SAP | South African Party |
| SAPARD | Special Accession Programme for Agriculture and Rural Development |
| SAPD | San Antonio Police Department |
| SAPD | Studies in American Political Development |
| SAPO | South African Post Office |
| SAPO | Silicoaluminophosphate |
| SAPO | South African Port Operations |
| SAPO | Specified Animal Pathogens Order |
| SAPO | Street Activity Permit Office |
| SAPO | Sub-Area Petroleum Office |
| sAPO | System Effects Audio Processing Object |
| SAPO | Servidor de Apontadores Portugueses |
| SAPO | South Australian Policy Online |
| SAPS | South African Police Service |
| SAPS | Simplified Acute Physiology Score |
| SAPS | Scale for the Assessment of Positive Symptoms |
| SAPS | St Antony’s Public School |
| SAPS | SAP Application Performance Standard |
| SAPS | Stand-Alone Power System |
| SAR | Specific Absorption Rate |
| SAR | Saudi Riyal |
| SAR | Search And Rescue |
| SAR | Synthetic-Aperture Radar |
| SAR | Structure–Activity Relationship |
| SAR | Special Administrative Region |
| SAR | School for Advanced Research |
| SAR | Saudi Railway Company |
| SAR | Subject Access Request |
| sar | System Activity Report |
| SAR | Suspicious Activity Report |
| SAR | Systemic Acquired Resistance |
| SAR | Sodium Adsorption Ratio |
| SAR | Society for Artistic Research |
| SAR | Sons of the American Revolution |
| SAR | Stop and Reverse |
| SAR | Stock Appreciation Right |
| SAR | Segmentation and Reassembly |
| SAR | Service Archive |
| SAR | Storage Aspect Ratio |
| SAR | Stramenopiles, Alveolates, and Rhizaria |
| SAR | Second Assessment Report |
| SAR | Scholars At Risk |
| SAR | South Australian Railways |
| SAR | Salanter Akiba Riverdale |
| SAR | Sterling Assault Rifle |
| SAR | Savage Alberta Railway |
| SAR | Singapore Assault Rifle |
| SARFAESI | Securitisation and Reconstruction of Financial Assets and Enforcement of Security Interest |
| SARS | Severe Acute Respiratory Syndrome |
| SARS | South African Revenue Service |
| SARS | Schweres Akutes Respiratorisches Syndrom |
| SARS | Syndrome Respiratoire Aigu Sévère |
| SARS | Suffolk Accident Rescue Service |
| SaRS | Safety and Reliability Society |
| SARS | Sacral Anterior Root Stimulator |
| SARS | Society of Academic and Research Surgery |
| SARS | Sveže Amputirana Ruka Satrijanija |
| SARS | Suspicious Activity Reporting System |
| SASAC | State-owned Assets Supervision and Administration Commission |
| SASAC | South Austin Senior Activity Center |
| SASAC | South Acton Skills and Arts Collaborative |
| SASE | Self-Addressed Stamped Envelope |
| SASE | Self Amplified Spontaneous Emission |
| SASER | Sound Amplification by Stimulated Emission of Radiation |
| Sass | Syntactically awesome style sheets |
| SASS | Shanghai Academy of Social Sciences |
| SASS | Single Action Shooting Society |
| SASS | Schools and Staffing Survey |
| SASS | Student Academic Success Services |
| SASS | State Authorities Superannuation Scheme |
| SASS | Society for the Advancement of Scandinavian Study |
| SASS | South African Secret Service |
| SASS | St Andrew’s Secondary School |
| SASS | School of Audiology and Speech Sciences |
| SAT | Saturday |
| SAT | Scholastic Assessment Test |
| SAT | Satisfiability |
| SAT | Special Assault Team |
| SAT | State Administration of Taxation |
| SAT | State Administrative Tribunal |
| SATA | Serial Advanced Technology Attachment |
| SATA | Sharjah Airport Travel Agency |
| SATA | Sociedade Açoreana de Transportes Aéreos |
| SATB | Soprano, Alto,Tenor, Bass |
| SATTE | South Asia Travel and Tourism Exchange |
| SAVWIPL | Skoda Auto VolksWagen India Private Limited |
| SBBJ | State Bank of Bikaner & Jaipur |
| SBC | Single-Board Computer |
| SBC | Seychelles Broadcasting Corporation |
| SBC | Southern Baptist Convention |
| SBC | Krantivira Sangolli Rayanna railway station |
| SBC | Sarawak Biodiversity Centre |
| SBC | Sadharan Bima Corporation |
| SBC | Swiss Bank Corporation |
| SBC | Small Block Chevy |
| SBC | Server-Based Computing |
| SBC | Sino-British College |
| SBC | Security Bank Corporation |
| SBC | Service Bureau Corporation |
| SBC | Stevenage Borough Council |
| SBC | Sweet Briar College |
| SBC | Singapore Bible College |
| SBC | Sitting Bull College |
| SBC | Samoa Broadcasting Corporation |
| SBC | Session Border Controller |
| SBC | St Bernard's College |
| SBC | St. Brendan's College |
| SBC | Steinbach Bible College |
| SBC | School of Broadcasting & Communication |
| SBCE | Simultaneous Bilateral Cataract Extraction |
| SBCE | Sree Buddha College of Engineering |
| SBCE | South Beach Chamber Ensemble |
| SBCE | Seguradora Brasileira Crédito à Exportação |
| SBH | Sequencing By Hybridization |
| SBH | State Bank of Hyderabad |
| SBH | St Barthelemy Airport |
| SBH | Sephardic Bikur Holim |
| SBH | Singapore Badminton Hall |
| SBI | State Bank Of India |
| SBMP | Santa Barbara Music Publishing |
| SBMP | Scotchbond Multi-Purpose |
| SBMP | Shri Bhagubhai Mafatlal Polytechnic |
| SBMP | South Beach Marketing & Promotion |
| SBP | Systolic Blood Pressure |
| SBP | School Breakfast Program |
| SBP | State Bank of Pakistan |
| SBP | State Bank of Patiala |
| SBP | Spontaneous Bacterial Peritonitis |
| SBP | Serotonin-Binding Protein |
| SBP | Sahitya Bhawan Publication |
| SBPD | Santa Barbara Police Department |
| SBR | Styrene-Butadiene Rubber |
| SBR | Sequencing Batch Reactors |
| SBR | Spectral Band Replication |
| SBR | Stone Brothers Racing |
| SBR | Space-Based Radar |
| SBR | Skills-Based Routing |
| SBR | Saibai Island Airport |
| SBR | Short Barreled Rifle |
| SBS | Small Business Server |
| SBS | Special Broadcasting Service |
| SBS | Shaken Baby Syndrome |
| SBS | Spanish Broadcasting System |
| SBS | Sick Building Syndrome |
| SBS | Saïd Business School |
| SBS | Short Bowel Syndrome |
| SBS | Steamboat Springs Airport |
| SBS | Special Boat Service |
| SBS | Seoul Broadcasting System |
| SBS | Swiss Business School |
| SBS | State Bank of Saurashtra |
| SBS | Shizuoka Broadcasting System |
| SBS | Skipton Building Society |
| SBS | Satellite Business Systems |
| SBS | Singapore Bus Services |
| SBS | Scottish Bible Society |
| SBSTC | South Bengal State Transport Corporation |
| SBT | State Bank of Travancore |
| SBTET | State Board of Technical Education and Training |
| SBTET | State Board of Technical Education and Training |
| Sc | Science |
| SC | South Carolina |
| SC | Short Circuit |
| SC | Santa Catarina |
| SC | Solar Cell |
| SC | Supreme Court |
| SC | Schmidt number |
| SC | Statutes of Canada |
| SC | Standard Chartered |
| SC | Scheduled Caste |
| SC | Stratum Corneum |
| SC | Subscriber Connector |
| SC | Surface Combatants |
| SC | Student Connections |
| SC | Sterling College |
| SC | Supercalendered |
| SC | Synchronous Condenser |
| SC | Sumitomo Corporation |
| SC | Superior Colliculus |
| SC | Sternoclavicular joint |
| SC | Straddle Carrier |
| SC | Satyawati College |
| SCADA | Supervisory Control And Data Acquisition |
| SCADA | South Carolina Automobile Dealers Association |
| SCADA | Southern California Asian Deaf Association |
| SCAN | Suspected Child Abuse and Neglect |
| SCAP | Security Content Automation Protocol |
| SCAP | Scottish Charity Appeals Panel |
| SCAP | Supreme Commander for the Allied Powers |
| SCAP | SREBP Cleavage-Activating Protein |
| SCAP | Supervisory Capital Assessment Program |
| SCAP | Specialty Coffee Association of Panama |
| SCAP | Standard Computerized Airplane Performance |
| SCAP | Alto Palena Airfield |
| SCART | Syndicat des Constructeurs d'Appareils Radiorécepteurs et Téléviseurs |
| SCB | Standard Chartered Bank |
| SCERT | State Council of Educational Research and Training |
| Sci-Fi | Science Fiction |
| Science | comes from the Latin word ‘scientia’, meaning “knowledge” |
| SCM | Supply Chain Management |
| SCM | Software Configuration Management |
| SCM | System Capital Management |
| SCM | Sternocleidomastoid |
| SCOTUS | Supreme Court of the United States |
| SCR | Silicon Controlled Rectifier |
| SCR | Seychellois rupee |
| SCR | Selective Catalytic Reduction |
| SCR | South Central Railway |
| SCR | South Coast Repertory |
| SCR | Steel Catenary Riser |
| SCR | Sport Club do Recife |
| SCR | Supreme Courts Reports |
| SCR | Sequence Control Register |
| SCR | Supreme Court Reports |
| SCRA | Servicemembers Civil Relief Act |
| SCRA | Special Class Railway Apprentice |
| SCRA | Scottish Countryside Rangers Association |
| SCRA | Securities Contracts Regulation Act |
| SCRA | Scottish Children’s Reporter Administration |
| SCRA | South Carolina Research Authority |
| SCRA | Single Channel Radio Access |
| SCRA | Sugar City Ratepayers Alliance |
| SCRA | Southern Contemporary Rock Assembly |
| SCSB | Self Certified Syndicate Bank |
| SCSB | Shanghai Commercial and Savings Bank |
| SCSB | Standard Capital Superannuation Benefit |
| SCSI | Small Computer System Interface |
| SCSS | Sassy CSS |
| SCSS | Senior Citizens Savings Scheme |
| SCSS | Symbolic Computation in Software Science |
| SCSS | Swiss Cottage Secondary School |
| SCUBA | Self-Contained Underwater Breathing Apparatus |
| SCVT | State Council of Vocational Training |
| SCVT | Symposium on Communications and Vehicular Technology |
| SD | Standard Definition |
| SD | Secure Digital |
| SD | Sudan Airways |
| SD | Spasmodic Dysphonia |
| SDCA | Short Distance Charging Area |
| SDD | Sudan Dinar |
| SDD | Subsystem Device Driver |
| SDD | Solution Deployment Descriptor |
| SDD | Silicon Drift Detector |
| SDD | Software Design Description |
| SDDS | Special Data Dissemination Standard |
| SDDS | Sony Dynamic Digital Sound |
| SDDS | School District Demographics System |
| SDHC | Secure Digital High Capacity |
| SDHC | San Diego Housing Commission |
| SDHC | School District of Hillsborough County |
| SDHC | Secure Digital Host Controller |
| SDHC | South Dakota Humanities Council |
| SDHC | South Downs Harness Club |
| SDK | Software Development Kit |
| SDK | Sandakan Airport |
| SDM | Security Device Manager |
| SDM | Brown Field Municipal Airport |
| SDM | Shared Decision Making |
| SDM | Sub Divisional Magistrate |
| Sdn Bhd | Sendirian Berhad |
| SDO | Service Data Objects |
| SDO | Solar Dynamics Observatory |
| SDO | Silent Death |
| SDO | Social Dominance Orientation |
| SDO | Scattered Disk Object |
| SDO | San Diego Opera Association |
| SDO | Ryotsu Sado Is |
| SDP | Session Description Protocol |
| SDP | Singapore Democratic Party |
| SDP | Social Democratic Party |
| SDP | Social Democratic Party of Croatia |
| SDPI | Social Democratic Party of India |
| SDPI | Sustainable Development Policy Institute |
| SDPI | Special Diabetes Program for Indians |
| SDPI | School Development Planning Initiative |
| SDR | Software Defined Radio |
| SDR | Special Drawing Rights |
| SDR | Santander Airport |
| SDRAM | Synchronous Dynamic Random Access Memory |
| SDRF | State Disaster Response Force |
| SDRF | State Disaster Response Fund |
| SDRF | San Diego Renaissance Faire |
| SDRF | Software Defined Radio Forum |
| SDRF | Sustainable Development Research Foundation |
| SDXC | Secure Digital eXtended Capacity |
| SE | Sweden |
| SE | System(s) Engineering |
| Se | Selenium |
| SE | Standard Error |
| SE | Structural Engineer |
| SE | Search Engine |
| SE | Standard English |
| SE | Societas Europaea |
| SE | Status Epilepticus |
| se | Sweden (TLD) |
| SE | Second Edition |
| SE | Slovenské Elektrárne |
| SE | Standard Edition |
| SE | Scottish Executive |
| SE | XL Airways France |
| SE | Stress Echocardiography |
| SE | Schloss Einstein |
| SE | Special Edition |
| SE | South Eastern postcode area |
| SE | System Expansion |
| SE | Sergipe |
| SEAL | SEa-Air-Land combat team |
| SEAL | Social and Emotional Aspects of Learning |
| SEAL | Software Evolution and Architecture Lab |
| SEAT | Sociedad Española de Automóviles de Turismo |
| SEAT | Single Engine Air Tanker |
| SEAT | Southeast Area Transit |
| SEATO | Southeast Asia Treaty Organization |
| SEBA | Board of Secondary Education, Assam |
| SEBA | Skandinaviska Enskilda Banken AB |
| SEBA | SouthEastern Bluegrass Association |
| SEBC | Socially and Educationally Backward Classes |
| SEBC | Southeastern Bible College |
| SEBC | Syrian European Business Center |
| SEBI | Securities and Exchange Board of India |
| sec | Second(s) |
| SEC | Securities and Exchange Commission |
| SEC | Secondary Average |
| SEC | Seiko Epson Corporation |
| SEC | Size Exclusion Chromatography |
| SEC | Scottish Episcopal Church |
| SEC | Southern Episcopal Church |
| SEC | Sarkeys Energy Center |
| SECAM | Séquentiel Couleur Avec Mémoire |
| SECAR | St. Eustatius Center for Archaeological Research |
| SECAR | Surface-wave Extended Coastal Area Radar |
| Sedo | Search Engine for Domain Offers |
| SEDO | Sustainable Energy Development Office |
| SEE-UPTU | State Entrance Examination - Uttar Pradesh Technical University |
| SEIAA | State Environment Impact Assessment Authority |
| SEIAA | Southeastern Indian Artists Association |
| SEM | Search Engine Marketing |
| SEM | Semester |
| SEM | Scanning Electron Microscope |
| SEM | Society for Ethnomusicology |
| SEMATECH | SEmiconductor MAnufacturing TECHnology |
| Sen | Senator |
| Sennheiser | named after one of its founders, Fritz Sennheiser |
| SENSEX | SENSitive indEX |
| SEO | Search Engine Optimization |
| SEO | Sociedad Española de Ornitología |
| SEO | Socio-Economic Objective |
| SEO | Seasoned Equity Offering |
| SEO | Security Engineering Officer |
| SEO | Séguéla Airport |
| SEO | State Electoral Office |
| Sep | September |
| SEP | Stanford Encyclopedia of Philosophy |
| SEP | Systems Engineering Process |
| SEP | Solar Energetic Particles |
| SEP | Single Exit Price |
| SEP | Secretaría de Educación Pública |
| SEP | Simplified Employee Pension |
| SEP | Student Exchange Program |
| SEP | Solar Electric Propulsion |
| SEP | Society for Exact Philosophy |
| SEP | Socialist Equality Party |
| SEP | Socialist Equality Party |
| SEP | Clark Field Airport |
| SEP | South End Press |
| SEP | Socialist Equality Party |
| SEP | Socialist Equality Party |
| SEP | Specialna Enota Policije |
| SEP | Social Equality Party |
| SERP | Search Engine Results Page |
| SERP | Supplemental Executive Retirement Plans |
| SES | Socio Economic Status |
| SES | Senior Executive Service |
| SES | Surface Effect Ship |
| SES | SecureEasySetup |
| SES | Single European Sky |
| SES | Southern Evangelical Seminary |
| SES | Stock Exchange of Singapore |
| SES | Sunnyside Environmental School |
| SES | Sembach Airport |
| SES | Scientific Equipment & Services |
| SES | Sea, Eugene, Shoo |
| SETI | Search for Extraterrestrial Intelligence |
| SEWA | Self-Employed Women’s Association |
| SEWA | Sharjah Electricity and Water Authority |
| SEWA | Society for Education and Welfare and Action |
| SEX | Set X |
| SEX | Software EXchange |
| SEX | Sodium Ethyl Xanthate |
| SEZ | Special Economic Zone |
| SEZ | Seychelles International Airport |
| SFC | System File Checker |
| SFC | Securities and Futures Commission |
| SFC | State Financial Corporation |
| SFC | Supercritical Fluid Chromatography |
| SfC | Skills for Change |
| SFC | St. Francis College |
| SFC | Scottish Funding Council |
| SFC | Sixth Form Certificate |
| SFI | Solid Fat Index |
| SFI | Science Foundation Ireland |
| SFI | Students Federation of India |
| SFI | Safi Airport |
| SFI | Santa Fe Institute |
| SFI | Solar Flux Index |
| SFOV | Scan Field Of View |
| SFS | Saint Francis de Sales |
| SFS | San Francisco Symphony |
| SFS | School of Foreign Service |
| SFS | Stepless Frequency Selection |
| SFS | Self-certifying File System |
| SFS | Sidwell Friends School |
| SFS | Superior Feed System |
| SFS | Subic Bay International Airport |
| SFS | Seoul Foreign School |
| SFTP | Secure File Transfer Protocol |
| SFTP | Screened Foiled Twisted Pair |
| SG | Singapore |
| SG | Selena Gomez |
| SG | Shooting Guard |
| Sg | Seaborgium |
| SG | Spark Gap |
| SG | Sanspareils Greenlands |
| sg | Singapore (TLD) |
| SG | Stevenage |
| SG | Sega Genesis |
| SG | Sonic Generations |
| SG | Saint Gabriel’s College |
| SG | Suddagunte |
| SGDQ | Summer Games Done Quick |
| SGOT | Serum Glutamic Oxaloacetic Transaminase |
| SGPA | Sessional Grade Point Average |
| SGPA | Sleeping Giant Park Association |
| SGPA | South Georgia Physicians Association |
| SGPGIMS | Sanjay Gandhi Post Graduate Institute of Medical Sciences |
| SGPT | Serum Glutamic Pyruvic Transaminase |
| SGRY | संपूर्ण ग्रामीण रोजगार योजना |
| SGSITS | Shri Govindram Seksaria Institute of Technology and Science |
| SGST | State Goods and Services Tax |
| SGST | Stool Guaiac Slide Test |
| SGST | School of Geospatial Sciences and Technology |
| SGST | Small Group Scenario Trainer |
| SGSY | स्वर्णजयंती ग्राम स्वरोजगार योजना |
| Sgt | Sergeant |
| SGT | Singapore Time |
| SGT | Surrounding Gate Transistor |
| SGT | Society of Glass Technology |
| SHA | Secure Hash Algorithm |
| SHA | State Highway Administration |
| SHA | School of Hotel Administration |
| SHA | Shareholders Agreement |
| SHA | Sample-And-Hold Amplifier |
| SHa | Syrian Hamster |
| SHA | State Health Agency |
| SHA | Superior Hypophyseal Artery |
| SHA | Socialist Health Association |
| SHA | Shanghai Hongqiao International Airport |
| SHA | Singapore Hotel Association |
| SHA | Saskatchewan Hockey Association |
| SHA | Strategic Health Authority |
| SHA | Sweet Home Alabama |
| SHA | Sacred Heart Academy |
| SHA | Sacred Heart Academy |
| SHA | Secondary Heads Association |
| SHA | Sagamihara Housing Area |
| SHARAD | SHAllow RADar |
| Sharad | Is the early autumn ritu, or season in the Hindu calendar |
| SHaRK | Soft Hard Real-time Kernel |
| SHARK | Shorthand Aided Rapid Keyboarding |
| Sharp | named from its first product, an ever-sharp pencil |
| SHF | Super High Frequency |
| SHG | Self Help Group |
| SHG | Second Harmonic Generation |
| SHG | Short-Handed Goals |
| SHG | Shungnak Airport |
| SHIELD | Strategic Hazard Intervention Espionage Logistics Directorate |
| SHM | Simple Harmonic Motion |
| SHM | Structural Health Monitoring |
| SHM | Swedish House Mafia |
| SHM | Society of Hospital Medicine |
| SHM | Sporadic Hemiplegic Migraine |
| SHM | Nanki–Shirahama Airport |
| SHM | Somatic Hypermutation |
| SHM | Sean Hyland Motorsport |
| SHO | Senior House Officer |
| SHO | Station House Officer |
| SHP | Saint Helena Pound |
| shp | Shapefile |
| SHP | Seton Hall Preparatory School |
| shp | Shaft horsepower |
| shp | Shipibo-Conibo |
| SHP | Small Heterodimer Partner |
| SHP | Henoch–Schönlein Purpura |
| SHP | Straight Heat Pipes |
| SHP | Schein Pharmaceutical |
| SHP | Sacred Heart Preparatory |
| SHP | Safety and Health Practitioner |
| SHP | Single Homeless Project |
| SHP | Sosyaldemokrat Halk Partisi |
| SHP | Qinhuangdao Shanhaiguan Airport |
| SHP | Sosyaldemokrat Halkçı Parti |
| SHP | Swanson Health Products |
| SHS | Sciences Humaines et Sociales |
| SHS | Self-propagating High-temperature Synthesis |
| SHS | Shiv Sena |
| SHS | Square Hollow Section |
| SHS | Society for Health Systems |
| SHS | Safford High School |
| SHS | Syosset High School |
| SHS | Sheffield High School |
| SHS | School-Home Support |
| SHS | Shashi Airport |
| shs | Shell Scrap |
| SHS | Snohomish High School |
| SHS | Springboro High School |
| SHS | Staples High School |
| SHS | Stevenson High School |
| SHS | Sultan High School |
| SHS | Selwyn House School |
| SHS | Socialist History Society |
| SHS | Swiss Heritage Society |
| SHS | Sanderson High School |
| SHS | Scarsdale High School |
| SHS | Sharyland High School |
| SHS | Sitka High School |
| SHS | Souhegan High School |
| SHS | Southaven High School |
| SHS | Stafford High School |
| SHS | Stamford High School |
| SHS | Statesboro High School |
| SHS | Streamwood High School |
| SHS | Sturgis High School |
| SHS | Sunnyvale High School |
| SHS | Sunset High School |
| SHS | Sackville High School |
| SHS | Shanghai High School |
| SHS | Shepparton High School |
| SHS | Stourport High School |
| SHS | Stroud High School |
| SHS | Sattari High School |
| SHS | Salem High School |
| SHS | Southside High School |
| SHS | Salida High School |
| SHS | Saraland High School |
| SHS | Sammamish High School |
| SHS | Sandusky High School |
| SHS | Schaumburg High School |
| SHS | Seekonk High School |
| SHS | Sherando High School |
| SHS | Springhill High School |
| SHS | Seagoville High School |
| SHS | Seaman High School |
| SHS | Shortridge High School |
| SHVS | Smart Hybrid Vehicle by Suzuki |
| SI | Système International d‘unités |
| SI | Slovenia |
| Si | Silicon |
| SI | Shift In |
| SI | Sub-Inspector |
| SI | Sports Illustrated |
| SI | Sacroiliac |
| SI | Swarm Intelligence |
| si | Sinhalese |
| si | Slovenia (TLD) |
| SI | Signal Integrity |
| SI | Small Intestine |
| SI | System Integrator |
| SI | Spark-Ignition |
| SI | Simple Interest |
| SI | Supplemental Instruction |
| SI | Statutory Instrument |
| SI | Svenska Institutet |
| SI | Schweizer Informatik Gesellschaft |
| SI | Solidaritat Catalana per la Independència |
| SI | Socialist International |
| SI | Solidaridad e Igualdad |
| SI | Survival International |
| SI | Province of Siena |
| SI | Substantia Innominata |
| SI | Suicidal Ideation |
| SI | Stroke Index |
| SI | Societas Iesu |
| SI | Sports Interactive |
| SI | St. Ignatius College Preparatory |
| SI | Silay Institute |
| SI | Smithsonian Institution |
| SI | Survey of India |
| SI | Station Inspector |
| SI | Skynet Airlines |
| SI | Samahang Ilokano |
| SI | Spokane International Railroad |
| SIAM | Society for Industrial and Applied Mathematics |
| SIAM | Society of Indian Automobile Manufacturers |
| SIAM | Service Integration and Management |
| SIAM | Salón Internacional del Automóvil México |
| SIB | South Indian Bank |
| SIBA | Society of Independent Brewers |
| SIBA | Southern Independent Booksellers Alliance |
| SIBA | Seychelles International Business Authority |
| SIBA | Southern Illinois Builders Association |
| SIBA | Strand Invasion Based Amplification |
| sic | sic |
| SIC | Standard Industrial Classification |
| SiC | Silicon Carbide |
| SIC | Sepang International Circuit |
| SIC | Sudbury Igneous Complex |
| SICA | Sick Industrial Companies Act |
| SID | Sports Information Director |
| SID | Security Identifier |
| SID | Society for Information Display |
| SID | System Identification Number |
| SID | Sensory Integration Disorder |
| SID | Standard Instrument Departure |
| SIDBI | Small Industries Development Bank of India |
| SIDCO | Small Industries Development Corporation |
| SIDCs | State Industrial Development Corporations |
| SIDO | Small Industries Development Organization |
| SIDO | Società Italiana di Ortodonzia |
| SIDO | State International Development Organizations |
| Sido | Paul Hartmut Würdig |
| SIDO | Small Industries Development Organisation |
| Siemens | from the name of its founders Werner von Siemens |
| SIFMA | Securities Industry and Financial Markets Association |
| SIFMA | Socialized Industrial Forest Management Agreement |
| SIGARCH | Special Interest Group on Computer Architecture |
| SIGBED | Special Interest Group on Embedded Systems |
| SIGINT | Signals Intelligence |
| SIGTRAN | Signaling Transport |
| SIIMA | South Indian International Movie Awards |
| SIM | Subscriber Identity Module |
| sim | simulation/simulator |
| SIM | Singapore Institute of Management |
| SIM | Selected Ion Monitoring |
| SIM | Society for Information Management |
| SIM | Systems Insight Manager |
| SIM | Security Information Management |
| SIM | Service de sécurité Incendie de Montréal |
| SIM | Sudan Interior Mission |
| SIM | Servicio de Inteligencia Militar |
| SIM | Servicio de Información Militar |
| SIM | Servizio Informazioni Militare |
| SIM | Studio for Interrelated Media |
| SIM | Space Interferometry Mission |
| SIM | Super-Resolution Microscopy |
| SIM | Scuola Italiana di Montevideo |
| SIMI | Students Islamic Movement of India |
| SIMI | Società Italiana di Medicina Interna |
| SIMI | Society of the Irish Motor Industry |
| SIMI | Scandinavian International Management Institute |
| SIMI | Sea Ice Mechanics Initiative |
| SIMM | Single In-line Memory Module |
| SIMONE | Ship Infrared Monitoring, Observation and Navigation Equipment |
| SIN | Sine |
| SIN | Social Insurance Number |
| sin | Sinhala |
| SIN | South Australian Sex Industry Network |
| SIN | Changi International Airport |
| SIN | Spanish International Network |
| SiN | Silicon Nitride |
| SINDSYS | South INDian SYStem |
| SIO | Serial Input/Output |
| SIO | Scripps Institution of Oceanography |
| SIO | Social Investment Organization |
| SIO | Students Islamic Organisation |
| SIO | Second Institute of Oceanography |
| SIOS | Software for Innovative Open Solutions |
| SIOS | Sehgal Institute of Studies |
| SIOS | Servizio Informazioni Operative e Situazione |
| SIP | Session Initiation Protocol |
| SIP | State Implementation Plan |
| SIP | Structural Insulated Panel |
| SIP | Systematic Investment Plan |
| SIPCOT | State Industries Promotion Corporation of Tamil Nadu |
| SIPG | Shanghai International Port Group |
| SIPG | Symmetric Interior Penalty Galerkin |
| SIPOC | Suppliers, Inputs, Process, Outputs, Customers |
| Siri | Siri is of Scandinavian origin and the meaning of Siri is “beautiful victory” |
| SIRI | Sugar Industry Research Institute |
| SiRi | Sustainable Investment Research International |
| sis | Sister |
| SIS | Software Installation Script |
| SIS | Side Impact Sensors |
| SIS | Single-Instance Storage |
| SIS | Shekou International School |
| SISO | Single Input, Single Output |
| SISO | Samsung Electronics India Software Operations |
| SIT | Special Investigation Team |
| SIT | Strategic Information Technology |
| SIT | Special Information Tone |
| SIT | School for International Training |
| SIT | Slovenian Tolar |
| SIT | Sitka Rocky Gutierrez Airport |
| SIT | Sterile Insect Technique |
| SIT | Siliguri Institute of Technology |
| SIT | Sydney Institute of Technology |
| SIT | Saitama Institute of Technology |
| SIT | Stevens Institute of Technology |
| SITA | Société Internationale de Télécommunications Aéronautiques |
| SITA | Swedish Interactive Thresholding Algorithm |
| SITA | South African State Information Technology Agency |
| Sitcom | Situation Comedy |
| SJCET | St. Joseph’s College of Engineering and Technology |
| SJCET | St. John College of Engineering and Technology |
| SJPUC | St. Joseph’s Pre-University College |
| SJSRY | Swarna Jayanthi Shahari Rozgar Yojana |
| SJW | Social Justice Warrior |
| SJW | Shijiazhuang Zhengding International Airport |
| SJW | Stanford Jazz Workshop |
| SJW | St. John’s Wort |
| SJW | Sir James Whitney |
| SKD | Semi Knocked-Down |
| SKD | Staatliche Kunstsammlungen Dresden |
| SKD | سائنس کی دنیا |
| SKD | Samarkand International Airport |
| SKD | Slovenski Krščanski Demokrati |
| SKD | Sigma Kappa Delta |
| SKD | Srpsko Kulturno Drustvo |
| SKD | Spontaneous Knife Defense |
| SKF | Svenska KullagerFabriken |
| SKF | Salman Khan Films |
| SKF | Smith, Kline & French |
| Skoda | named after Emil von Skoda, a Czech engineer |
| SKSSF | Samastha Kerala Sunni Students Federation |
| SKU | Stock Keeping Unit |
| SKU | Skyros Island National Airport |
| SKU | Sri Krishnadevaraya University |
| Skype | the original concept for the name was Sky-Peer-to-Peer, which morphed into Skyper, then Skype |
| SL | Sierra Leone |
| sl | Sierra Leone (TLD) |
| SL | Sick Leave |
| SL | Step Length |
| SL | Sleeper Class |
| SL4A | Scripting Layer for Android |
| SLA | Service-Level Agreement |
| SLA | Sealed Lead-Acid |
| SLA | Second-Language Acquisition |
| SLA | Stereolithography |
| SLA | Specific Leaf Area |
| SLA | Martín Miguel de Güemes International Airport |
| SLA | Spacecraft Lunar Module Adapter |
| SLA | Short-Long Arms |
| SLB | Sport Lisboa e Benfica |
| SLB | Securities Lending and Borrowing |
| SLB | Storm Lake Municipal Airport |
| SLBM | Submarine-Launched Ballistic Missile |
| SLC | Single-Level Cell |
| SLC | Student Leadership Council |
| SLC | Sarah Lawrence College |
| SLC | School Leaving Certificate |
| SLI | Scalable Link Interface |
| SLI | Safe Load Indicator |
| SLI | Solwezi Airport |
| SLI | Sri Lanka Insurance |
| SLI | Specific Language Impairment |
| SLI | Space Launch Initiative |
| SLI | Sangli Railway Station |
| SLIP | The Serial Line Internet Protocol |
| SLO | San Luis Obispo |
| SLO | Student learning Outcomes |
| SLORC | State Law and Order Restoration Council |
| SLR | Single Lens Reflex |
| SLR | Slphur Springs Municipal Airport |
| SLR | Statutory Liquidity Ratio |
| SLR | Sri Lanka Railways |
| SLR | Seating cum Luggage Rake |
| SLR | Satellite Laser Ranging |
| SLR | Sending Loudness Rating |
| SLR | Scalable Linear Recording |
| SLS | Sodium Lauryl Sulfate |
| SLS | Selective Laser Sintering |
| SLS | Space Launch System |
| SLS | Stanford Law School |
| SLS | Static Light Scattering |
| SLS | Swiss Light Source |
| SLS | Street League Skateboarding |
| SLS | Symbiosis Law School |
| SLS | Same Language Subtitling |
| SLS | Самостална либерална странка |
| SLS | Slovenska Ljudska Stranka |
| SLS | Standard Linear Solid |
| SLS | Scalable Lossless Coding |
| SLS | Signaling Link Selection |
| SLS | Softlanding Linux System |
| SLS | Stephenson Locomotive Society |
| SLS | Sydney Law School |
| SLS | Sim Lim Square |
| SLS | Српска либерална странка |
| SLS | Single-Level Storage |
| SLS | Seville Luxury Sedan |
| SLV | Satellite Launch Vehicle |
| SLV | State Library of Victoria |
| SMA | Simple Moving Average |
| SMA | Spinal Muscular Atrophy |
| SMA | Shape-Memory Alloy |
| SMA | Smooth Muscle Actin |
| SMA | Superior Mesenteric Artery |
| SMA | Supplementary Motor Area |
| SMA | Stone Mastic Asphalt |
| SMA | Submillimeter Array |
| sma | Southern Sámi |
| SMA | Sergeant Major of the Army |
| SMA | System, Mess und Anlagentechnik |
| SMA | SubMiniature version A |
| SMA | Separately Managed Account |
| SMA | Societas Missionum ad Afros |
| SMA | Sarasota Military Academy |
| SMA | San Miguel de Allende |
| SMA | Signal Magnitude Area |
| SMA | Styrene Maleic Anhydride |
| SMA | Santa Maria Airport |
| SMA | Special Memorandum Account |
| SMA | Saint Mary’s Academy |
| SMA | Staunton Military Academy |
| SMA | Société de Motorisations Aéronautiques |
| SMA | San Marcos Academy |
| SMA | Algerian Muslim Scouts |
| SMA | Society of Makeup Artists |
| SMAC | Social, Mobility, Analytics, Cloud |
| SMAC | Sensor Media Access Control Protocol |
| SMAC | Sid Meier’s Alpha Centauri |
| SMAC | Social Media Advertising Consortium |
| SMAC | Sabang Merauke Raya Air Charter |
| SMAC | Southwestern Michigan Athletic Conference |
| SMAC | Stone Mountain Arts Center |
| SMAC | Simulation Model of Automobile Collisions |
| SMART | Self Monitoring Analysis And Reporting Technology |
| SMART | Skill Management & AccReditation of Training Centres |
| SMB | Small and Medium Business |
| SMB | Server Message Block |
| SMB | Franco Bianco Airport |
| SMB | System Management Bus |
| SMB | Simulated Moving Bed |
| SMB | San Miguel Brewery |
| SMB | Southwest Missouri Bank |
| SMB | Society for Mathematical Biology |
| SMC | School Management Committee |
| SMC | Smooth Muscle Cell |
| SMC | Sliding Mode Control |
| SMC | Smart Media Card |
| SMC | San Miguel Corporation |
| SMC | System Management Controller |
| SMC | Surat Municipal Corporation |
| SMC | Small Magellanic Cloud |
| SMC | Sequential Monte Carlo |
| SMC | Structural Maintenance of Chromosomes |
| SMC | Sheet Moulding Compound |
| SMC | SubMiniature version C |
| SMC | Santa Monica College |
| SMC | Space and Missile Systems Center |
| SMC | Samsung Medical Center |
| SMC | Salmaniya Medical Complex |
| SMC | Suzuki Motor Corporation |
| SMC | Swathanthra Malayalam Computing |
| SMC | Scottish Mountaineering Club |
| SMC | Southwestern Michigan College |
| SMC | Spartanburg Methodist College |
| SMC | Stanley Medical College |
| SMC | Swiss Management Center |
| SMC | Science Media Centre |
| SMC | Supreme Military Council |
| SMC | Stranka Modernega Centra |
| SMC | Speak Mandarin Campaign |
| SMC | Short-run Marginal Cost |
| SMC | Sargodha Medical College |
| SMC | Sufi Muslim Council |
| SMC | St. Michael's College |
| SMC | St. Michael's College |
| SMC | Senior Military College |
| SMC | Stewart's Melville College |
| SMC | Seattle Men's Chorus |
| SMC | Southern Media Corporation |
| SMC | Secret Maryo Chronicles |
| SMC | Senior Mathematical Challenge |
| SMC | Shaw Multicultural Channel |
| SMD | Surface Mount Device |
| SMD | Smith Field Airport |
| SMD | Standard Market Design |
| SMD | Sony Mobile Display |
| SME | Small and Medium Enterprises |
| SME | Subject-Matter Expert |
| SME | Society of Manufacturing Engineers |
| SME | Society for Mining, Metallurgy, and Exploration |
| SME | Système de Management Environnemental |
| SME | Sony Music Entertainment |
| SME | Situational Method Engineering |
| SME | Standard-Model Extension |
| SME | Small to Medium Enterprise (SME) Server |
| SME | Subsequent Memory Effect |
| SME | Socialist Market Economy |
| SME | SM Entertainment |
| SME | Solar Mesosphere Explorer |
| SME | Structure Mapping Engine |
| SME | Lake Cumberland Regional Airport |
| SME | Shivamogga |
| SME | Secure Memory Encryption |
| SMH | Sydney Morning Herald |
| SMH | Shake My Head |
| SMH | System Management Homepage |
| SMH | Sound Mental Health |
| SMH | Sarasota Memorial Hospital |
| SMH | St. Michael’s Hospital |
| SMH | Strong Memorial Hospital |
| SMH | Somatic Marker Hypothesis |
| SMH | Scotland Memorial Hospital |
| SMH | Studio Museum in Harlem |
| SMH | Sapmanga Airport |
| SMH | Scripps Mercy Hospital |
| SMH | St. Mary’s Hospital |
| SMHU | Secure Mental Health Unit |
| SMHU | Special Management Housing Unit |
| SMIL | Synchronized Multimedia Integration Language |
| SMO | Social Media Optimization |
| SMO | Santa Monica Airport |
| SMO | SQL Server Management Objects |
| SMO | Senior Medical Officer |
| SMO | Survey and Mapping Office |
| SMO | Sabhal Mòr Ostaig |
| SMPS | Switched Mode Power Supply |
| SMPTE | Society of Motion Picture and Television Engineers |
| SMR | San Marino |
| SMR | Shingled Magnetic Recording |
| SMR | Specialized Mobile Radio |
| SMR | Simón Bolívar Airport |
| SMR | Standardized Mortality Ratio |
| SMR | Standardized Morbidity Rate |
| SMR | Sid Meier’s Railroads |
| SMR | Skeletal Muscle Relaxant |
| SMR | Historic Environment Record |
| SMR | St. Marys Rubbers |
| SMR | Snowdon Mountain Railway |
| SMS | Short Message Service |
| SMS | Sainte Marie Airport |
| SMS | Space Motion Sickness |
| SMS | Stranka Mladih Slovenije |
| SMS | Systems Management Server |
| SMS | Static Memory System |
| SMS | Sawai ManSingh Medical College |
| SMSC | Short Message Service Center |
| SMSC | Standard Microsystems Corporation |
| SMSC | South Mississippi Soccer Club |
| SMSC | Stephenville Medical and Surgical Clinic |
| SMT | Surface-Mount Technology |
| Smt | Shrimati |
| SMT | Sequential Manual Transmission |
| SMT | Scottish Motor Traction |
| SMT | Simultaneous Multi-Threading |
| SMTP | Simple Mail Transfer Protocol |
| SMU | Source–Measurement Unit |
| SMU | Southern Methodist University |
| SMU | Sikkim Manipal University |
| SMU | Special Mission Unit |
| SMU | Singapore Management University |
| SMU | Saint Mary’s University |
| SMU | System Management Unit |
| SMU | Swansea Metropolitan University |
| SMU | Saint Mary’s University |
| SMU | Southern Medical University |
| SMU | St. Matthew’s University |
| SNDP | ശ്രീ നാരായണ ധർമ്മ പരിപാലന |
| SNDP | Samoan National Development Party |
| SNDP | Special Needs Diversionary Program |
| SNF | Skilled Nursing Facility |
| SNF | Spent Nuclear Fuel |
| SNF | Solids-Not-Fat |
| SNF | Schweizerischer Nationalfonds zur Förderung der wissenschaftlichen Forschung |
| SNF | Sunday Night Football |
| SNF | Sveriges Nationella Förbund |
| SNF | Somali National Front |
| SNF | Server Normal Format |
| SNF | Sub Teniente Nestor Arias Airport |
| SNF | Shiv Nadar Foundation |
| SNGCE | Sree Narayana Gurukulam College of Engineering |
| SNGCET | Sree Narayana Guru College of Engineering and Technology |
| SNGIST | Sree Narayana Guru Institute of Science and Technology |
| SNIMS | Sree Narayana Institute of Medical Sciences |
| SNIST | Sreenidhi Institute of Science and Technology |
| SNMP | Simple Network Management Protocol |
| SNR | Signal-to-Noise Ratio |
| SO | Significant Other |
| SO | Somalia |
| SO | Sales Order |
| SO | Southern Company |
| SO | Sulfur monoxide |
| SO | Southampton postcode area |
| SO | Superior Oblique |
| so | Shared Object |
| so | Somalia (TLD) |
| SO | Senior Officer |
| SO | Salpingo-Oophorectomy |
| SO | Security Officer |
| SO | Station Officer |
| SO | System Operator |
| SO | Station Officer |
| SOAP | Simple Object Access Protocol |
| SoC | System on Chip |
| SOC | State Of Charge |
| SOC | Statement Of Condition |
| SOC | Special Operations Command |
| SOC | Span Of Control |
| SOC | State-Owned Company |
| SOC | Standard Occupational Classification |
| SOC | Summer of Code |
| SOC | Service-Oriented Computing |
| SOC | Sirte Oil Company |
| SOC | Sumitomo Osaka Cement |
| SOC | Scotch Oakburn College |
| SoCal | Southern California |
| Socal | Standard Oil Company of California |
| SOF | Special Operations Forces |
| SOF | Sofia Airport |
| SoF | Soldier of Fortune |
| SOF | Soldier of Fortune |
| SOF | Science Olympiad Foundation |
| SOFA | Status Of Forces Agreement |
| SOFEL | SOFtware Engineering Laboratory |
| SOHA | Southwest Oral History Association |
| SOHC | Single OverHead Camshaft |
| SOHC | Occupational Health and Safety Coordinator |
| SOHO | Small Office/Home Office |
| SOHO | Solar and Heliospheric Observatory |
| SoHo | South of Hollywood Road |
| SOI | Silicon On Insulator |
| SOI | Spheres Of Influence |
| SOI | Southern Oscillation Index |
| SOI | Start of Injection |
| SOI | Survey of India |
| SOI | School of Infantry |
| SOI | Sports Outreach Institute |
| SONAR | SOund Navigation And Ranging |
| SONET | Synchronous Optical Network |
| SONGS | San Onofre Nuclear Generating Station |
| Sonogram | from Latin sonus (sound) + gram (written character, that which is drawn) |
| SONOGRAM | Sounds Of Nahshid Originate Good Rhymes And Music |
| Sony | from the Latin word ‘sonus’ meaning sound |
| SOP | Sum of Products |
| SOP | Standard Operating Procedure |
| SOP | Secondary Oxygen Pack |
| SOP | Same Origin Policy |
| SOP | Moore County Airport |
| SOPA | Stop Online Piracy Act |
| SOPA | Schedule of Proposed Actions |
| SOPA | Synchronous Orbit Particle Analyzer |
| SOPA | Senior Officer Present Afloat |
| SOPA | Socialist Party of Azania |
| SOR | System of Record |
| SOR | Strategic Elements Limited |
| SOR | Source of Receipt |
| SoR | Society of Radiographers |
| Sor | Residual Oil Saturation |
| SOR | Starfire Optical Range |
| SOR | Al Thaurah Airport |
| SOR | Southern Oil Refineries |
| SOR | School Organisation Review |
| SOR | Special Officer Revenue |
| SOR | Successive Over-Relaxation |
| SOS | Save Our Souls |
| SOTU | State of the Union |
| SP | Service Pack |
| SP | Service Provider |
| SP | Superintendent of Police |
| Sp | Symplectic group |
| SP | Singapore Polytechnic |
| SP | Samajwadi Party |
| SP | Salisbury postcode area |
| SP | Saskatchewan Party |
| SP | Solidarity Party |
| SPA | Derived from the name of the town of Spa, Belgium (Aquae Spadanae) |
| SpA | Società per Azioni |
| SPA | School of Public Affairs |
| SPA | Secure Password Authentication |
| SPA | Saudi Press Agency |
| SpaceX | Space eXploration |
| SPARK | Sports, Play, and Active Recreation for Kids |
| SPARK | Students Promoting Awareness of Research Knowledge |
| SPARK | Scanning, Parsing, and Rewriting Kit |
| SPARK | Self-Protection Adaptive Roller Kit |
| SPARK | Society of Professional Asset-Managers and Record Keepers |
| SPARK | Service and Payroll Administrative Repository for Kerala |
| SPD | Sozialdemokratische Partei Deutschlands |
| SPD | Serial Presence Detect |
| SPD | Sensory Processing Disorder |
| SPD | Saidpur Airport |
| SPD | Salmon Poisoning Disease |
| SPDIF | Sony-Philips Digital Interconnect Format |
| SPDT | Single Pole, Double Throw |
| SPDT | Single-Point Diamond Turning |
| SPDT | Stuart Pimsler Dance & Theater |
| SPDY | Speedy |
| Spec | Specification |
| SPEC | Standard Performance Evaluation Corporation |
| Spec | Spectrophotometer |
| SPEC | Society Promoting Environmental Conservation |
| SPEC | Stakeholder Partnerships, Education and Communication |
| SPEC | Special Purposes Examination for Chiropractic |
| SPF | Sender Policy Framework |
| SPF | Statutory Provident Fund |
| SPF | Black Hills Airport |
| SPF | Sun Protection Factor |
| SPF | Singapore Police Force |
| SPF | Specific Pathogen Free |
| SPF | Space Power Facility |
| SPF | Society for the Propagation of the Faith |
| SPGBK | Springbreak |
| SPHERES | Synchronized Position Hold Engage and Reorient Experimental Satellites |
| SPIPA | Sardar Patel Institute of Public Administration |
| SPIPA | South Puget Intertribal Planning Agency |
| SPJIMR | SP Jain Institute of Management and Research |
| SPM | Scanning Probe Microscope |
| SPM | Statistical Parametric Mapping |
| SPM | Sijil Pelajaran Malaysia |
| SPM | Suspended Particulate Matter |
| SPM | Strokes Per Minute |
| SPM | Socialist Party of Macedonia |
| SPM | Saint Peter-Marian |
| SPM | South Park Mexican |
| SPM | Spangdahlem Air Base |
| SPM | Somali Patriotic Movement |
| SPM | Southern Praying Mantis |
| SPM | Shots Rer Minute |
| SPM | Sirpur Paper Mills |
| SPMCIL | Security Printing & Minting Corporation of India Limited |
| SpO2 | Saturation of Peripheral Oxygen |
| SPP | System Platform Processor |
| SPP | Singapore People’s Party |
| SPP | Serial Port Profile |
| SPP | Science Power Platform |
| SPP | Security and Prosperity Partnership of North America |
| SPR | Special Purpose Rifle |
| SPR | Surface Plasmon Resonance |
| Sprint | Southern Pacific Railroad Intelligent Network of Telecommunications |
| SPSS | Statistical Package for the Social Sciences |
| SPSS | St. Paul’s Secondary School |
| SPSS | Masisea Airport |
| SPSS | Self-Propelled Semi-Submersible |
| sq | Square |
| Sq | Square |
| SQ | Singapore Airlines |
| Sq | Squadron |
| SQ | Social Quotient |
| SQ | San Quentin Prison |
| SQL | Structured Query Language |
| SQL | Sales Qualified Lead |
| SQL | Squelch |
| SQL | San Carlos Airport |
| SQL | Sonora Quest Laboratories |
| SQT | Software Qualification Testing |
| SQT | Software Quality Testing |
| SQT | Skill Qualification Test |
| SQT | SEAL Qualification Training |
| SQT | Samarai Island Airport |
| Sr | Senior |
| SR | State Route |
| sr | Steradian |
| SR | Southern Railway |
| SR | Stochastic Resonance |
| SR | Superior Rectus |
| SR | Saturable Reactor |
| SR | Synchrotron Radiation |
| SR | Saarländischer Rundfunk |
| SR | Strehl Ratio |
| SR | Swissair |
| SRAM | Static Random Access Memory |
| SRAM | an acronym containing the names of its founders, Scott, Ray, and Sam |
| SRAM | Short Range Attack Missile |
| SRAM | Scientific Review of Alternative Medicine |
| SRC | Student Representative Council |
| SRC | State Rehabilitation Council |
| SRC | System Resource Controller |
| SREBP | Sterol Response Element Binding Protein |
| SRFTI | Satyajit Ray Film and Television Institute |
| sRGB | standard Red Green Blue |
| SRK | Shah Rukh Khan |
| SRK | Steffen Robertson and Kirsten |
| SRK | Samrau Railway Station |
| SRK | Survival Rescue Knife |
| SRM | Supplier Relationship Management |
| SRM | Standard Reference Method |
| SRM | Solid Rocket Motor |
| SRM | Sri Ramaswamy Memorial |
| SRM | Sandringham Airport |
| SRM | Specified Risk Material |
| SRM | Scalable Reliable Multicast |
| SRM | Structural Risk Minimization |
| SRMJEEE | SRM Joint Engineering Entrance Examination |
| SRN | Service Request Number |
| srn | Sranan Tongo |
| SRN | State Registered Nurse |
| SRN | Salem Radio Network |
| SRN | Scottish Recovery Network |
| SRN | Simple Recurrent Network |
| SRN | Союз Русского Народа |
| SRP | Suggested Retail Price |
| SRP | Spatial Reuse Protocol |
| SRP | Security Rollup Package |
| SRS | Sound Retrieval System |
| SRS | Software Requirements Specification |
| SRS | Supplemental Restraint System |
| SRS | Sample Registration System |
| SRS | Stereotactic Radiosurgery |
| srt | SubRip Text |
| SRT | Street & Racing Technology |
| SRT | Sweeney, Robertson and Tocher |
| SRT | Sardinia Radio Telescope |
| SRT | Sachin Ramesh Tendulkar |
| SRT | Smart Response Technology |
| SRT | Superficial Radiation Therapy |
| SRT | State Railway of Thailand |
| SRT | Spiritual Response Therapy |
| SRT | Serial Reaction Time |
| SRT | Sex Reassignment Therapy |
| SRT | Single Rope Technique |
| SRT | Special Reaction Team |
| SRT | Suzhou Rail Transit |
| SRT | Super Rapid Train |
| SRT | Schuylkill River Trail |
| SRT | Sichuan Radio and Television |
| SRT | Singapore Repertory Theatre |
| SRT | Special Rescue Team |
| SRT | Suter Racing Technology |
| SRT | Swiss Racing Team |
| SRT | Scandinavian Radio Technology |
| SRT | Sam Rayburn Tollway |
| SRT | Seleslagh Racing Team |
| SRT | Souris River Telecommunications |
| SRT | Standard Radio & Telefon |
| SRT | Samuel Robertson Technical |
| SS | Stainless Steel |
| SS | Super Sport |
| SS | South Sudan |
| SS | Schutzstaffel |
| SS | Secret Service |
| SS | Screw Steamer |
| SS | Steam Ship |
| SS | Corsair International |
| SS | Sassari |
| SS | Slave Select |
| ss | scilicet |
| ss | Swazi (Swati language) |
| SS | Sjögren’s Syndrome |
| SS | Systemic Sclerosis |
| SS | Shortstop |
| SS | Special Stage |
| SS | Strong Safety |
| SS | Social Security |
| SS | Stack Segment |
| SS | Sega Saturn |
| SS | Server-Side |
| SS | Sweet’s Syndrome |
| SS | Shiv Sena |
| SS | Stockholms Spårvägar |
| SS | Special Stage |
| SS | SS Sunridges |
| SS | Southend-on-Sea postcode area |
| SS | SteadyShot |
| ss | South Sudan (TLD) |
| SS | Sand Springs Railway |
| SS | Maatschappij tot Exploitatie van Staatsspoorwegen |
| SS | Sheng Shi/Sang Sat |
| SS | (+)-sabinene synthase |
| SS7 | Signaling System 7 |
| SSB | Single Side Band |
| SSB | Services Selection Board |
| SSB | Statistisk Sentralbyrås |
| SSBN | Ship, Submersible, Ballistic, Nuclear |
| SSC | Staff Selection Commission |
| SSC | Secondary School Certificate |
| SSc | Systemic Sclerosis |
| SSC | School Site Council |
| SSC | Swedish Space Corporation |
| SSC | Sierra Student Coalition |
| SSC | State Services Commission |
| SSC | Stretch-Shortening Cycle |
| SSC | Speed Skating Canada |
| SSC | Sinhalese Sports Club |
| SSC | Ship-to-Shore Connector |
| SSC | Shelby SuperCars |
| SSC | Student Selected Component |
| SSC | St Stephen’s College |
| SSC | Seminole State College |
| SSC | South Seattle College |
| SSC | South Suburban College |
| SSC | Sangha Supreme Council |
| SSC | Statistical Society of Canada |
| SSC | Sector Skills Councils |
| SSC | Shaw Air Force Base |
| SSC | Stennis Space Center |
| SSC | Super Star Cluster(s) |
| SSC | Shanghai Supercomputer Center |
| SSC | St Stanislaus’ College |
| SSC | Saint Stanislaus College |
| SSC | Saint Stephen’s College |
| SSC | State Security Council |
| SSC | Superconducting Super Collider |
| SSC | Sistema Supporto Condotta |
| SSC | Specialized System Consultants |
| SSC | Santa Sabina College |
| SSC | Society of Solicitors in the Supreme Courts of Scotland |
| SSC | Singapore Symphony Chorus |
| SSD | Solid-State Drive |
| SSD | Sexual Size Dimorphism |
| SSD | Social Security Disability |
| SSD | Saturated Surface Dry |
| SSD | Sterol-Sensing Domain |
| SSD | Speech Sound Disorder |
| SSD | Single-Sided Deafness |
| SSD | Seven-Segment Display |
| SSD | System Sequence Diagram |
| SSD | Sardar Sarovar Dam |
| ssd | Siroi |
| SSD | Stansted Airport |
| SSD | Signal-Sensing Domain |
| SSD | Schwartz Sequential Dropping |
| SSD | Sacramento County Sheriff's Department |
| SSF | Single Stock Futures |
| SSF | Special Security Force |
| SSF | Sunni Students Federation |
| SSF | Standard Storage Format |
| SSF | Shakespeare Schools Festival |
| SSF | Singapore Sailing Federation |
| SSF | Slow Sand Filtration |
| SSF | Salter Street Films |
| SSF | Space Systems Finland |
| SSGN | Ship, Submersible, Guided, Nuclear |
| SSH | Secure Shell |
| SSH | Sea Surface Height |
| SSH | Sharm el-Sheikh International Airport |
| SSHD | Solid State Hybrid Drive |
| SSHD | Society for the Study of Human Development |
| SSI | Server Side Includes |
| SSI | Small Scale Industry |
| SSI | Supplemental Security Income |
| SSI | Scuba Schools International |
| SSI | Strategic Studies Institute |
| SSI | Single System Image |
| SSI | Space Studies Institute |
| SSI | Malcolm McKinnon Airport |
| SSID | Service Set Identifier |
| SSID | Statewide Student Identifier |
| SSL | Secure Sockets Layer |
| SSL | Single Stuck Line |
| SSL | Space Systems Laboratory |
| SSL | Shonan Shinjuku Line |
| SSL | Sodium Stearoyl Lactylate |
| SSL | Software Systems LLC |
| SSL | Solid-State Laser |
| SSL | Space Sciences Laboratory |
| SSLC | Secondary School Leaving Certificate |
| SSLv2 | Secure Sockets Layer version 2 |
| SSLv3 | Secure Sockets Layer version 3 |
| SSML | Speech Synthesis Markup Language |
| SSML | Ship and Offshore Structural Mechanics Laboratory |
| SSN | Social Security Number |
| SSN | Servizio Sanitario Nazionale |
| SSN | Servicio Sismológico Nacional |
| SSN | SIM Serial Number |
| SSN | Simultaneous Switching Noise |
| SSN | Surgical Segment Navigator |
| SSN | Subsystem Number |
| SSN | Ship, Submersible, Nuclear |
| SSN | Soul of the South Network |
| SSN | Scholars Strategy Network |
| SSN | Sri Sivasubramaniya Nadar |
| SSN | Species Survival Network |
| SSN | Seoul Air Base |
| SSN | Stoom Stichting Nederland |
| SSN | Seed Savers’ Network |
| SSN | Sason railway station |
| SSN | Setanta Sports News |
| SSNCE | Sri Sivasubramaniya Nadar College of Engineering |
| SSP | The System Service Processor |
| SSP | Species Survival Plan |
| SSP | Senior Superintendent of Police |
| SSP | System Service Processor |
| SSP | Scottish Socialist Party |
| SSSP | Society for the Study of Social Problems |
| SSSP | Student Support Services Program |
| SSSP | Seafood Spoilage and Safety Predictor |
| SSSP | Society for the Scientific Study of Psychopathy |
| SST | Sea Surface Temperature |
| SST | Singapore Standard Time |
| SST | Sport Shift Transmission |
| SST | School of Science and Technology |
| SST | Spitzer Space Telescope |
| SST | Shiva Smart Tunneling |
| SST | Social Studies |
| SST | Sunday Star-Times |
| SST | Social Skills Training |
| SST | Statistical Significance Test |
| SST | Santa Teresita Airport |
| SSUP | Self Service Update Portal |
| St | Street |
| St | Saint |
| ST | Sao Tome and Principe |
| ST | Scheduled Tribe |
| ST | Germania |
| ST | Stoke-on-Trent |
| ST | Straits Times |
| ST | Student Transportation Inc. |
| ST | Split |
| ST | Short Ton |
| ST | Service Tax |
| st | sine tempore |
| ST | Surface Temperature |
| st | Sao Tome and Principe (TLD) |
| ST | Students’ Ticket |
| STAR | Standardized Testing and Reporting |
| STAR | Technology and Research Early College High School at Erasmus |
| STAR | Special Tactics and Rescue |
| STAR | Science, Technology and Research |
| STARD | STAndards for the Reporting of Diagnostic accuracy studies |
| STARD | Science and Technology Application for Rural Development |
| STARD | South Travancore Agency for Rural Development |
| STATCOM | Static Synchronous Compensator |
| STB | Set Top Box |
| STB | Surface Transportation Board |
| STB | Singapore Tourism Board |
| STC | Sensitivity Time Control |
| STC | Society for Technical Communication |
| STC | Supplemental Type Certificate |
| STC | Sydney Theatre Company |
| STC | Saudi Telecom Company |
| STC | Service Tax Number |
| STC | Samuel Taylor Coleridge |
| STC | Savannah Technical College |
| STC | Saskatchewan Transportation Company |
| STC | St. Theresa’s College |
| STC | St. Cloud Regional Airport |
| STCG | Short Term Capital Gain |
| STD | Sexually Transmitted Disease |
| STD | Subscriber Trunk Dialling |
| STEM | Science, Technology, Engineering, and Mathematics |
| STEM | Scanning Transmission Electron Microscope |
| STEM | Soluble Trace Element Mix |
| STF | Supremo Tribunal Federal |
| STF | Special Task Force |
| STF | Stephen Island Airport |
| STF | Special Task Force |
| Stmt | Statement |
| STMT | Sankuyo Tshwaragano Management Trust |
| STP | Standard Temperature and Pressure |
| STP | Spanning-Tree Protocol |
| STP | Sewage Treatment Plant |
| STP | Straight-Through Processing |
| STP | Signal Transfer Point |
| STP | Shielded Twisted Pair |
| STP | Stone Temple Pilots |
| STPI | Singapore Tyler Print Institute |
| StRUT | Students Recycling Used Technology |
| STT | State Street Corporation |
| STT | Securities Transaction Tax |
| STT | Speech To Text |
| STT | Schirmer Tear Test |
| STT | Cyril E. King Airport |
| sudo | super user do |
| SUDO | Sudan Social Development Organization |
| SUDO | Syracuse University Drama Organization |
| SUHD | Super/Samsung Ultra High Definition |
| SUPARCO | Space and Upper Atmosphere Research Commission |
| SUPD | Side Underride Protection Device |
| SUPD | Southern Ute Police Department |
| SuSE | Software und System-Entwicklung |
| SUV | Sport Utility Vehicle |
| SUV | Standardized Uptake Value |
| SUV | Nausori International Airport |
| Suzuki | from the name of its founder, Michio Suzuki |
| SVD | Singular Value Decomposition |
| SvD | Svenska Dagbladet |
| SVD | Societas Verbi Divini |
| SVD | Swine Vesicular Disease |
| SVD | Spontaneous Vaginal Delivery |
| SVD | E.T. Joshua Airport |
| SvD | Sander van Doorn |
| SVD | Simultaneous Voice and Data |
| SVD | Snaiperskaya Vintovka Dragunova |
| SVD | Sarwari railway station |
| SVD | Selective Vehicle Detection |
| SVG | Scalable Vector Graphics |
| SVG | Static Var Generator |
| SVG | Stavanger Airport |
| SVG | Sawalgi Railway Station |
| SVG | Sports Video Group |
| SVG | Saphenous Vein Grafts |
| SVGA | Super Video Graphics Array |
| SVGA | System Video Graphics Alliance |
| SVGA | Safeguarding Vulnerable Groups Act |
| SVGA | Saskatchewan Vegetable Growers Association |
| SVHC | Substances of Very High Concern |
| SVHC | Southwestern Vermont Health Care |
| SVHC | Seven Valleys Health Coalition |
| SVHC | Sacopee Valley Health Center |
| SVHC | Scottish Veteran Harriers Club |
| SVKM | Shri Vile Parle Kelavani Mandal |
| SVKM | Kamarata Airport |
| SVN | Subversion |
| SVN | Social Venture Network |
| SVN | Society for Vascular Nursing |
| SVN | Space Vehicle Number |
| SVN | Sri Vivekanand Niji |
| SVN | 7 Days Group Holdings Limited |
| SVN | Student Video Network |
| SVP | Senior Vice President |
| SVP | Schweizerische Volkspartei |
| SVP | Society of Vertebrate Paleontology |
| SVP | Social Venture Partners |
| SVP | Kuito Airport |
| SVP | SmoothVideo Project |
| SVP | Sardar Vallabhbai Polytechnic |
| SvP | Svenskarnas Parti |
| SVP | Südtiroler Volkspartei |
| SVP | Struški Večeri na Poezijata |
| SVP | Soil Vent Pipe |
| SVP | Save Percentage |
| SVPNPA | Sardar Vallabhbhai Patel National Police Academy |
| SWAK | Sealed With A Kiss |
| SWAN | Structured Wireless Aware Network |
| SWAN | State Wide Area Network |
| SWAT | Special Weapons And Tactics |
| SWAT | Soil and Water Assessment Tool |
| SWF | Shockwave Flash |
| SWF | Sydney Writers’ Festival |
| SWF | Sovereign Wealth Fund |
| SWF | Salt Water Flush |
| SWIFT | Society for Worldwide Interbank Financial Telecommunication |
| SWIFT | Spinning Wheel Integrated Force Transducer |
| SWL | Safe Working Load |
| SWL | Shortwave Listening |
| SWL | Sound Power Level |
| SWL | Swale |
| SWL | Stillwater–Westport Line |
| SWL | Socialist Workers League |
| SWOT | Strengths, Weaknesses/Limitations, Opportunities, and Threats |
| SWP | State Water Projects |
| SWP | Swap File |
| SWP | Socialist Workers Party |
| SWP | Socialist Workers Party |
| SWP | Systematic Withdrawal Plan |
| SWR | South Western Railway |
| SWR | Standing Wave Ratio |
| SWR | Swiss International Air Lines |
| SWR | Südwestrundfunk |
| SWR | Scandinavian Weekend Radio |
| SWR | Swift Water Rescue |
| SWR | Safe Withdrawal Rate |
| SWR | Secondary Water Resistance |
| SWTD | Kerala State Water Transport Department |
| SWTD | Swim With The Dolphins |
| Sx | Symptoms/Surgery |
| SX | Sint Maarten |
| SX | Simplex |
| sx | Sint Maarten (TLD) |
| SX | Skybus Airlines Inc |
| SXSW | South by Southwest |
| SYJC | Second Year Junior College |
| Sync | Synchronise/Synchronous/Synchronization |
| SYNC | Scheduling Your Network Connections |
| SYNC | Senior & Youth National Conference |
| SYNC | Synacor |
| SYSM | Sarvottam Yudh Seva Medal |
