TST

TST may stand for:

== Science and technology == Ternary search tree, in computer science Transition state theory, of chemical reaction rates TST (gene) Tuberculin skin test Tectonic strain theory, in geology Total sleep time Total station theodolite, instrument used for surveying and building construction Typed set theory, in mathematical logic Transgressive systems tract, in sequence stratigraphy (geology) Tail suspension test, stress test for rats Team selection test TEST (x86 instruction), short form for the TEST assembly instruction