HLH
- Basic helix–loop–helix
- George Racey Jordan
- HLH Orion
- Haklau Min
- Harry Lloyd Hopkins
- Haydom Lutheran Hospital
- Heavy-lift helicopter
- Hectopsyllidae
- Hemophagocytic lymphohistiocytosis
- Hulan District
- List of Brigham Young University buildings
- List of administrative divisions of Heilongjiang
- List of airline codes (H)
- List of mineral symbols
- Ulanhot Yilelite Airport