| 释义 |
- Science, technology and engineering
- Standards, and standards organisations
- Companies
- Organisations
- Media and entertainment
- Other uses
TSI may refer to: {{TOC right}}Science, technology and engineering- Thyroid stimulating immunoglobulin
- Time-Slot Interchange, communications network switches
- Total solar irradiance received at top of atmosphere
- Trophic state index of plant nutrients in waterbodies
- Triple sugar iron test or TSI slant, of a microorganism's ability to ferment sugars
- Turbo fuel stratified injection, a VW engine trademark TSI or TFSI
Standards, and standards organisations- Technical Specifications for Interoperability within European railways
- Trading Standards Institute, a British professional association
- Trustworthy Software Initiative, UK
Companies- TekSavvy Solutions Inc., Canadian telecommunications company
- Telesensory Systems Inc., maker of products for the blind
- Town Sports International, an operator of fitness facilities
Organisations- The Seasteading Institute, for creating dwellings on seaborne platforms in international waters
- Three Seas Initiative, European intergovernmental group
Media and entertainment- Televisione svizzera di lingua italiana, Swiss Italian-language TV
Other uses- True strength index of financial markets
- Tissue saturation index in medical near-infrared spectroscopy
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