HPL

• Haldia Petrochemicals Limited, an Indian petrochemical company
• Hutchison Property Limited, now Hutchison Whampoa Property, a property developer in Hong Kong
• Hindustan Prefab Limited, a project of the Indian Ministry of Housing and Urban Poverty Alleviation

• City of Hialeah Public Library, in Florida, United States
• Hamilton Public Library (Ontario), in Canada
• Hartford Public Library, in Connecticut, United States
• Hershey Public Library, in Pennsylvania, United States
• Houston Public Library, in Texas, United States

• HPL (programming language), for HP programmable calculators
• HPL Engine, a series of game engines
• HPL Engine 1
• HPL Engine 2
• HPL Engine 3
• Hartlepool railway station, England, station code
• Hermanos de Pistoleros Latinos, a Hispanic-American prison gang
• High-pressure laminate, a composite material
• Hockey Premier League, a proposed international league
• Human placental lactogen (hPL), a hormone
• High-performance low-power, a TSMC semiconductor wafer type
• HPL (benchmark), an implementation of the LINPACK computing benchmark
• H. P. Lovecraft (1890–1937), American author

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