TH1
# TH1

TH1 may refer to:

* Th1 cell, a type of T helper cells
* Tianhe-I (TH-1), a Chinese super computer
* TH1 the scripting language for web pages in fossil (software), the Fossil SCM
* Windows 10 Threshold 1
* TH-1, a character in The Source (Ayreon album)
* TH-1 (Phytophthora infestans), a subpopulation of the Ia mtDNA haplotype of the A2 mating type
