HRT
HRT stands for:
- Habit reversal training , a behavioral method for treating nervous behavioral habits
- Handheld Radio Terminal , a handheld radio for trunked radio
- Action regulation theory , a work psychological theory on the inner mental structure of human actions
- Hartwell Railroad , a railroad company
- Heidelberg Retina Tomograph , a scanning laser ophthalmoscope for examining the eye
- Heidelberger Rechen Test , a test to assess basic mathematical skills in elementary school age
- Helsingforsregionens trafik , transport association in the Helsinki region, see Helsingin seudun liikenne
- High reliability theory
- Hispania Racing F1 Team , former motorsport racing team driving with a Spanish license, which competed in Formula 1 from 2010 to 2012
- Hormone Replacement Therapy , Hormone Replacement Therapy , a drug treatment for menopausal symptoms
- Hostage Rescue Team , a special unit of the American Federal Police FBI
- HRT conjecture in analysis
- Hrvatska Radiotelevizija , the Croatian public broadcasting company
- Hydraulic retention time , in biogas technology the mean retention time of a substrate in a reactor