Health Information Technology 
Heavy Ion Telescope 
Heparin Induced Thrombocytopenia 
Hitachi 
Hang in there 
hazard information transmission 
High Isolation Transformer 
High-Interest Track 
Homing Intercept Technology 
Horizontal Integration Team 
Human Interface Technology 
Hackers In Touch 
haemagglutination-inhibition test 
hamster insulin tumor 
hamster insulinoma tumor 
hamster insulin-secreting tumor 
hamster islet tumor 
Harbin Institute of Technology 
Hardware Integration Test 
HDL-cholesterol intervention trial 
Headache Impact Test 
Headend Interface Terminal 
Health Indication Test 
Health Information Technician 
Heavy-Ion Theory 
Helitalia 
hemagglutination inhibition test 
Heparin Induced Thrombocytopaenia 
heparin-associated thrombocytopenia 
heparin-induced thrombocytopaenia