HCT
- 7400-series integrated circuits
- HCL color space
- HCMOS
- HCT Co., Ltd.
- HCT Group
- Hadassah College of Technology
- Hardware Compatibility Test
- Healthcare technician
- Hematocrit
- Hematopoietic cell transplantation
- Herefordshire College of Technology
- Herpetological Conservation Trust
- Hertfordshire Community NHS Trust
- Higher College of Technology
- Higher Colleges of Technology
- Huncoat railway station
- Hydrochlorothiazide
- Longer Heavier Vehicle
- Road Train