HDD
- Characters of the Hyperdimension Neptunia series
- Device file
- H. D. Deve Gowda
- Hand Drawn Dracula
- Handan East railway station
- Hard disk drive
- Head-down display
- Heating degree day
- High definition display
- Honorary Doctor of Divinity
- Horizontal Directional Drilling
- Hyderabad Airport (Sindh)
- Hyperdimension Neptunia