HPI

HPI can refer to:

In technology:

• Hardware Platform Interface, a technical specification defined by the Service Availability Forum
• High Pressure Injection, which can refer to:
  • a technology to inject diesel fuel into the cylinder
  • a safety system in nuclear reactors which involves forcing large amounts of cold water into the reactor core
• .HPI, one of the compression formats used by the 1997 RTS Total Annihilation

In medicine:

• Heinrich Pette Institute, an institute for basic research in virology and immunology, based in Hamburg, Germany
• Human probiotic infusion, a treatment, targeting the intestines
• High probability instruction, a behaviorist therapy based on positive reinforcement
• History of the present illness
• Human Performance Improvement

In other uses:

• Happy Planet Index, an index of human well-being and environmental impact
• Hasso Plattner Institute, a privately-funded university near Potsdam, Germany
• Hobby Products International, a manufacturer of radio control vehicles
• House Price Index, a measure of property values within a United States metropolitan area or postal code
• Human Poverty Index, a United Nations measure of the amount of poverty in various countries.
• Huron Potawatomi, Inc., the business division of the Nottawaseppi Huron Band of Potawatomi