HCP
- Aga Khan Historic Cities Programme
- H. Cegielski – Poznań
- Habitat Conservation Plan
- Hamiltonian path problem
- Handicap (horse racing)
- Harding Charter Preparatory High School
- HashiCorp
- Haut Commissariat au Plan
- Health Consumer Powerhouse
- Healthcare professional
- Healthcare proxy
- Healthpeak Properties
- Hereditary coproporphyria
- Heritage College, Perth
- Hexagonal close-packed
- High card points
- Highland Capital Partners
- Himalayan Cataract Project
- Hitachi Data Systems
- Howrah Police Commissionerate
- Human Connectome Project
- Hydrocephalus
- Hypnotize Camp Posse
- Memphis, Tennessee
- Phosphaacetylene
- Type VI secretion system