Hardware Compatibility Test, a test to check if a product is compatible with an Operating System.

Holloway Circus Tower, a 120 m (394 ft) tall building in Birmingham, England, UK.

Hematocrit, a measure of the proportion of blood volume that is occupied by red blood cells.

Hydrochlorothiazide, a diuretic drug.

Higher Colleges of Technology, a tertiary education institution in the United Arab Emirates.

Herefordshire College of Technology, a college of Further Education (FE) in Hereford, England, UK.

Higher College of Technology Muscat,Oman.

Huncoat railway station, England; National Rail station code HCT.