HCP
- H. Cegielski - Poznań S.A., a Polish manufacturing company from Poznań
- Habitat Conservation Plan
- CRC Handbook of Chemistry and Physics, published by CRC Press
- High Card Points, a contract bridge term
- Hardcore porn, explicit pornography with strong sexual content
- Health Care Property Investors, Inc. is a REIT focused on hospital and medical facilities investments
- Health care provider
- Hereditary coproporphyria, a deficiency disease
- Hexagonal close-packed is an arrangement of spheres into the closest packed arrangement
- High Court Petition
- Hitachi Content Platform
- (Dynamic) Host Configuration Protocol, a protocol used by networked computers
- Hot copy, a Linux command line utility (hcp)
- Hypnotize Camp Posse is a rap music record label founded by Three 6 Mafia
- Methylidynephosphane, a molecule with the chemical formula HCP