| S&TI | Scientific and Technical Intelligence 
| Others |
| STI | Safety Technology International
| Others |
| STI | Sales Tax Invoice
| Others |
| STI | Santiago Municipal Airport, Santiago, Dominican Republic
| Others |
| STI | Satellite Transmitted Image
| Others |
| STI | Science and Technology Information
| Others |
| STI | Science and Technology Integration
| Others |
| STI | Science Team Information
| Others |
| STI | Science Technology and Ingenuity
| Others |
| STI | Science Technology and Innovation
| Others |
| STI | Science Technology Ingenuity
| Others |
| STI | Science, Technology, and Innovation
| Others |
| STI | Scientific and Technical Information
| Others |
| STI | Scientific Technologies Inc
| Others |
| STI | Search for Terrestrial Intelligence
| Others |
| STI | Segmenting Track Identifier
| Others |
| STI | Self Test Input
| Others |
| STI | Self Timed Interconnect
| Others |
| STI | Self Timed Interface
| Others |
| STI | Serum Trypsin Inhibitor
| Others |
| STI | Set Interrupt Enable Flag
| Others |
| STI | Severe Thumb Injury
| Others |
| STI | Sexual Tension Infusion
| Others |
| STI | Sexually Transmissible Infections
| Others |
| STI | Sexually Transmitted Incident
| Others |
| STI | Sexually Transmitted Infection
| Others |
| STI | sexually transmitted infection(s)
| Others |
| STI | Sexually transmitted infections
| Others |
| STI | Sexually-Transmitted Infection
| Others |
| STI | Shallow Trench Isolation
| Others |
| STI | Shared Theme Image
| Others |
| STI | Shimano Total Integration
| Others |
| STI | Short Term Incentive
| Others |
| STI | Short Term Investments
| Others |
| STI | Short-Term Incentive
| Others |
| STI | Sick Turbocharged Insanity
| Others |
| STI | Sierra Tel Internet
| Others |
| STI | Signal Transduction Inhibitor
| Others |
| STI | Simple Technology Incorporated
| Others |
| STI | Single Table Inheritance
| Others |
| STI | Single Target Instruction
| Others |
| STI | Single Tuned Interstage
| Others |
| STI | Slower Than I
| Others |
| STI | Smoky Turbo Inevitable
| Others |
| STI | Soft Tissue Injury
| Others |
| STI | soft-tissue infection(s)
| Others |
| STI | Software Technology, Inc.
| Others |
| STI | Sole Technology Institute
| Others |
| STI | Solutions Technology Integrator
| Others |
| STI | Sony Toshiba Ibm
| Others |
| STI | Source Transport Inversion
| Others |
| STI | Southeast Technical Institute
| Others |
| STI | Special Tenant Improvement
| Others |
| STI | Special Trim Injection
| Others |
| STI | Specialized Transportation Inc
| Others |
| STI | Specified Technologies Inc
| Others |
| STI | Specified Technologies, Inc.
| Others |
| STI | Speech Transmission Index
| Others |
| STI | Sport Turbo Injection
| Others |
| STI | Staff Training Institute (Pakistan)
| Others |
| STI | Standard Tape Interface
| Others |
| STI | Standard Terminal Interface
| Others |
| STI | Standard Text Interface
| Others |
| STI | Standard Transcoding Interface
| Others |
| STI | Standard Triumph International
| Others |
| STI | State Traffic Inspectorate
| Others |
| STI | State Transition Identifier
| Others |
| STI | Steel Tank Institute
| Others |
| STI | Steel Tube Institute
| Others |
| STI | Stellar Technologies International
| Others |
| STI | Still Image
| Others |
| STI | Still Image Architecture
| Others |
| STI | Stop Touching It
| Others |
| STI | Storm Tracking Information Overlay
| Others |
| STI | Story Testimony Invitation
| Others |
| STI | Straits Times Index
| Others |
| STI | Strategic Transportation Investments
| Others |
| STI | Structured Treatment Interruption
| Others |
| STI | Structured Treatment Interruptions
| Others |
| STI | Subaru Technica International
| Others |
| STI | Subaru Tecnica International
| Others |
| STI | Subaru Terrestrial Invasion
| Others |
| STI | Super Touring Injection
| Others |
| STI | Superconductor Technologies Inc
| Others |
| STI | Surrey Thugs Incorporated
| Others |
| STI | Sustainable Transport Initiative
| Others |
| STI | Sustainable Travel International
| Others |
| STI | Symbol Table Information
| Others |
| STI | Symptom Targeted Intervention
| Others |
| STI | Systemes de Transport Intelligents
| Others |
| STI | Systems Technology Institute
| Others |
| STI | Systolic Time Interval
| Others |