HRT

HRT most commonly refers to:

• Hormone replacement therapy, a treatment used to reduce symptoms associated with menopause
• Transgender hormone therapy, also known as hormone replacement therapy
• Hostage Rescue Team, the FBI's elite tactical unit

HRT may also refer to:

Health and medicine

• Habit reversal training
• Heart rate turbulence
• Humane Research Trust, a British medical research charity
• Heidelberg Retinal Tomography, a diagnostic procedure that produces three-dimensional images of the optic nerve

Motor racing

• Haupt Racing Team, a German auto racing team
• HRT Formula 1 Team, now defunct
• Walkinshaw Andretti United, an Australian motor racing team that previously traded as the Holden Racing Team

Transport

• Hampton Roads Transit, in the Norfolk-Virginia Beach, United States metro area
• Hartwell Railroad, in Georgia, United States
• Heavy rail transit
• Helsinki Regional Transport Authority (Swedish: Helsingfors Regionaltrafik)
• Hertfordshire Rail Tours, a defunct British railway company
• Hiroshima Rapid Transit, in Japan
• Honolulu Rail Transit, now known as Skyline, an under-construction light metro project in Hawaii
• Hurlburt Field, a United States Air Force field in Florida, United States
• RAF Linton-on-Ouse, a Royal Air Force station in England (IATA code: HRT)

Other uses

• Hard real-time, in computing
• Hértevin language, spoken in Turkey
• Hertfordshire, county in England, Chapman code
• High rising terminal, a feature of speech
• Hrvatska radiotelevizija, Croatia's national broadcaster
• Hudson River Trading, an American trading firm
• Hydraulic retention time, in hydrology
• Hostage Rescue Team, a tactical unit of the Federal Bureau of Investigation