HU, Hu or hu may refer to:
- .hu, the Internet country code top-level domain for Hungary
- Hu (digraph), used primarily in Classical Nahuatl
- Hu (vessel), a type of ancient Chinese bronze vessel
- Fu (kana), also romanised as Hu, Japanese kana ふ and フ
- Hungarian language, ISO 639 alpha-2, hu
- Hainan Airlines, from their IATA airline code
- Hollywood Undead, an American rap rock band
- Holographic Universe, in quantum gravity and string theories
- Hounsfield Units, on the Hounsfield scale, a unit of measurement used on a computed tomography machine (CAT)
- Wu Hu, an ancient Chinese term for five nomadic tribes surrounding ancient China
Read more about Hu: People, Mythology and Religion, Places, Education