| Acronym | Definition |
|---|
| STS | Space Transportation System |
| STS | Sad To Say |
| STS | Streets (US Postal service standard street suffix) |
| STS | Science, Technology and Society |
| STS | Soft Tissue Sarcoma |
| STS | Simple Template System |
| STS | Science and Technology Studies |
| STS | Society of Thoracic Surgeons |
| STS | So To Speak |
| STS | Simplified Tax System |
| STS | Security Token Service |
| STS | Synchronous Transport Signal |
| STS | Sequence Tagged Site |
| STS | Science Talent Search |
| STS | Schweizer Tierschutz |
| STS | Speech to Speech (phone service for people with a speech disability) |
| STS | Soft Tissue Swelling |
| STS | Student Technology Services |
| STS | SharePoint Team Services |
| STS | Scanning Tunneling Spectroscopy |
| STS | Source Transfer Switch |
| STS | Severe Tropical Storm |
| STS | Ship to Ship |
| STS | Scholarly Technology Services |
| STS | Standard Threshold Shift (temporary hearing loss) |
| STS | Support This Site |
| STS | Slow the Spread (of the Gypsy Moth project) |
| STS | Science and Technology Section (American Library Association & Association of College and Research Libraries) |
| STS | Static Transfer Switch |
| STS | Special Tactics Squadron |
| STS | Sea-To-Sky (Highway Improvement Project; Canada) |
| STS | Seville Touring Sedan (Cadillac) |
| STS | Shipboard Technical Support |
| STS | Science and Technology for Sustainability |
| STS | Special Transportation Service |
| STS | Southeast Tourism Society |
| STS | Service Technicians Society |
| STS | Sit-To-Stand |
| STS | Satanas (Filipino gang in California) |
| STS | Surface To Surface |
| STS | Steps To Success |
| STS | Section de Techniciens Supérieurs (French) |
| STS | Serologic Test for Syphilis |
| STS | Shuttle Transportation System |
| STS | Service to Self |
| STS | Societe de Transport de Sherbrooke (Sherbrooke Transport Company; Canada) |
| STS | Short-Throw Shifter (automotive) |
| STS | Student to Student (grant program) |
| STS | Simon the Sorcerer (game) |
| STS | Serviciul de Telecomunicatii Speciale (Special Telephony Service; Romanian Secret Service) |
| STS | Sworn to Secrecy |
| STS | Safety Trained Supervisor (Certification) |
| STS | Siemens Transportation Systems, Inc. |
| STS | Spoke Too Soon |
| STS | Society for Textual Scholarship |
| STS | Sing the Sorrow (AFI album) |
| STS | Sentence To Serve |
| STS | Sister to Sister |
| STS | System Technical Support |
| STS | Space Tourism Society |
| STS | Significant Threshold Shift |
| STS | Shared Tenant Services |
| STS | Space-Time Spreading (CDMA transmission) |
| STS | Support Ticket System |
| STS | Station-To-Station Protocol |
| STS | Satellite Television Service |
| STS | Space-Time-Space |
| STS | Scholastic Testing Service |
| STS | Smalltalk Solutions |
| STS | Support Transgenre Strasbourg (French: Strasbourg Transgendered Support) |
| STS | Signal Transduction Society |
| STS | Socio-Technical Perspective |
| STS | Solar Terrestrial Science |
| STS | Small Town Sleeper (band) |
| STS | Steiner Triple System |
| STS | Stanislavsky Theater Studio |
| STS | Standard Technical Specifications |
| STS | Student Transcript System |
| STS | Student Telephone Services |
| STS | Somerset Tire Service Inc |
| STS | Sensor to Shooter |
| STS | Stockpile-to-Target Sequence |
| STS | Scientific Telephone Samples |
| STS | Secure Terminal Servers |
| STS | Special Tactical Services |
| STS | Subcommittee on Telecommunications Security (NSTISSC) |
| STS | Stone Table Software |
| STS | Second Temple Synagogues |
| STS | Synchronous Time Stamps (ATMF) |
| STS | Santa Rosa, CA, USA - Sonoma County Airport (Airport Code) |
| STS | Smalltalk Systems |
| STS | Secure Telephone System |
| STS | SingStat Time Series (Singapore) |
| STS | Strength Through Science |
| STS | Solar Thruster Sailor |
| STS | Structural Time Series (Sprint) |
| STS | Specialty Training Standard |
| STS | Squires Turbo System (automotive) |
| STS | Special Travel Service |
| STS | Sandusky Transit System |
| STS | Ski Touring Section |
| STS | Scuderia Trentina Storica (Italian: Scuderia Historical Club) |
| STS | Safe Training Systems Ltd. (Wokingham, Berkshire, England) |
| STS | Submarine Technology Symposium |
| STS | System Test Set |
| STS | Service des Tâches Spéciales (French: Service of Special Tasks) |
| STS | Seal Team Six |
| STS | Single Tine Separator (John Deere) |
| STS | Surface Technology Systems Ltd. (UK) |
| STS | Security and Technology Solutions (Ernst & Young) |
| STS | Spring Training Series (cycling) |
| STS | Silicon Tracking System |
| STS | Sport Touring Sedan (Cadillac) |
| STS | System to Standard |
| STS | Specialized Treatment Service |
| STS | Star Separator |
| STS | Select Timing Service |
| STS | Sheboygan Transit System (Sheboygan, WI) |
| STS | Sears Technology Services, Inc. |
| STS | Seasonal Timing Strategy (investing) |
| STS | Synergy Teleconferencing System |
| STS | Subscription Television Service |
| STS | Special Thematic Sessions |
| STS | Singapore Test Services Pte Ltd |
| STS | Single Trusted System |
| STS | System Technology Support |
| STS | Student Timetable System |
| STS | Saskatoon Transit Service |
| STS | Specialized Turbine Services |
| STS | Security Termination Statement |
| STS | Secured Transaction Section |
| STS | Strategic Test Solutions |
| STS | Storage Systems Specialists (UK) |
| STS | Sports Training System |
| STS | Seattle Tamil Sangam |
| STS | Single Track Seek (Seagate) |
| STS | Schuylkill Transportation Systems |
| STS | Solutions Technology and Software Inc |
| STS | Student Theological Society |
| STS | SAS (Scandinavian Airline System) Technical Services (Scandinavia) |
| STS | Software Test Station (oftware development, especially defense contacts) |
| STS | Sequential Thinning Strategy (forestry) |
| STS | Site Tracking System |
| STS | Student Training Station |
| STS | Simultaneous Translation Services |
| STS | (USN Rating) Sonar Technician (Submarine) |
| STS | Salary Table Setup |
| STS | Severn Trent System |
| STS | Secure Technology Solutions Inc |
| STS | Sodium Toluene - Sulphorate |
| STS | Shoot the Stuff (polite form) |
| STS | Smalltalk Session |
| STS | Servo-actuator Test Station |
| STS | single tree search |
| STS | Swirl Tertiary Stage (low NOx burners) |
| STS | Shared Telecommunications System |
| STS | Short-Term Systematic Variance |
| STS | Software Technical Specification |
| STS | SONET Terminal Server |
| STS | Submissions Tracking System |
| STS | Strategic Training Squadron |
| STS | Southern Transmission Systems |
| STS | Sensor to Service |
| STS | State to State Transfer |
| STS | System Timing Step |
| STS | Small Traffic Station |
| STS | Server Translation Scheme (VSS) |
| STS | Stereo Theater System |
| STS | Stabilized Tracking Set |
| STS | Supplemental Telephony Service (Lucent) |
| STS | Statistics & Traffic Measurement Subsystem (GSM networks) |
| STS | Slicker Than Shoot |
| STS | Single Track Switch |