What does THI stand for?

Tactical Hit Indicator (SAUS)

Tai Long - Language code (ETLW)

Telehop, Inc. - Fresno, CA - Telecommunications (TSSD)

Temperature-Humidity Index

Terre Haute - Indiana - Seismograph station code, US Geological Survey (SEIS)

Texas Heart Institute - University of Texas - Research center (RCD)

Theodor Herzl Institute (EA)

Thermo Instrument Sys - AMEX symbol

Thermo Instrument Systems, Inc. - AMEX symbol (SPSG)

Thing (automobile) - NCIC car model code

Thios Resources (SAUS)

Thios Resources, Inc. - Vancouver Stock Exchange symbol

Third Harmonic Index (SAUS)

Time Handed In - Navy

Total Height Index (OA)

Trans Healthcare, Inc. (MHID)

Transient Hypogammaglobinemia of Infancy - Immunology (DAVI)

Travelers Health Institute - Later, ITHI

Trihydroxyindol - Organic chemistry

Trihydroxyindole (STED)

Trinity Health International