LPI
# LPI

LPI may refer to:

## Places

* Linköping/Saab Airport (IATA code), Sweden
* Linus Pauling Institute, at Oregon State University, US
* Pyramide Inversée, a skylight constructed in an underground shopping mall in front of the Louvre Museum in France
* Lady Parry Island, an uninhabited island in Nunavut, Canada

## Organizations

* Lunar and Planetary Institute, a scientific research institute dedicated to study of the solar system, its formation, evolution, and current state
* Linux Professional Institute, a non-profit organization that provides vendor-independent professional certification for Linux system administrators and programmers
* LPI Media, a gay and lesbian publisher in the United States

## Science and technology

* Dye penetrant inspection or liquid penetrant inspection, an inspection method used to locate surface-breaking defects in all non-porous materials
* Lysinuric protein intolerance, an autosomal recessive metabolic disorder affecting amino acid transport
* Leaf plastochron index, a measure of plant leaf age based on morphological development
* Lysophosphatidylinositol, an endocannabinoid neurotransmitter
* Living Planet Index, an indicator of the state of global biological diversity, based on trends in vertebrate populations of species from around the world
* Lines per inch, a measurement of printing resolution
* Laser Peripheral Iridotomy; See Glaucoma surgery
* Liquid phase injectors and liquid propane injection, in autogas
* Low-power idle in Energy-Efficient Ethernet

## Economics and finance

* Logistics Performance Index, a benchmarking tool created by the World Bank
* Limited Price Indexation, a pricing index used in the calculation of increases in certain components of scheme pension payments in the UK
* Legatum Prosperity Index, an annual ranking developed by the Legatum Institute

## Other uses

* La Paz incident, occurred in May 1863 at the ghost town of La Paz in Confederate Arizona and was the westernmost confrontation of the American Civil War
* Language Proficiency Index, a Canadian standardized test for English proficiency written and administered by the University of British Columbia Applied Research and Evaluation Services
* Leading pedestrian interval, a type of traffic control
* Licensed private investigator, a type of private investigator
* Liga Primer Indonesia, an Indonesian top-tier football league held in 2011
* Linear partial information, a method of making decisions based on insufficient or fuzzy information
