Other
- Head Phones President, a Japanese metal band
- Hawaiian Paradise Park, Hawaii, a community on the island of Hawaii
- Hydroelectric power plant
- Holme Pierrepont National Watersports Centre, an English watersports centre
- High pressure processing of food
- High Performance Program
- The Hardy, Pomeau and de Pazzis model, an early lattice gas automaton method
- .hpp is a filename extension for C++ header files
- HPP model, the first lattice Boltzmann model, introduced by Hardy, Pomeau and de Pazzis and named after the authors
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