HDC
- HDC Hyundai Development Company
- Halal Industry Development Corporation
- Haldia Dock Complex
- Hammond Northshore Regional Airport
- Handle of Device Context
- Health Data Consortium
- Health and Disability Commissioner
- Heavyweight Dub Champion
- Herräng Dance Camp
- High Desert Corridor
- High-Definition Coding
- Hill descent control system
- Histidine decarboxylase
- Historic Districts Council
- Holder in due course
- Home Detention Curfew
- Honeysuckle Development Corporation
- Hyperdimensional computing