HPL
- City of Hialeah Public Library
- H. P. Lovecraft
- HPL (benchmark)
- HPL (programming language)
- HPL Engine
- HPL Engine 1
- HPL Engine 2
- HPL Engine 3
- Haldia Petrochemicals
- Hamilton Public Library (Ontario)
- Hartford Public Library
- Hartlepool railway station
- Hermanos de Pistoleros Latinos
- Hershey Public Library
- High-pressure laminate
- Hockey Premier League
- Houston Public Library
- Human placental lactogen
- Hutchison Whampoa Property
- Ministry of Housing and Urban Poverty Alleviation
- TSMC