Entertainment and media
* '' Performance Racing Industry'', a magazine * PRI Records, in Los Angeles, US *Measurements and codes
* Perceptual Reasoning Index, in the WAIS-IV intelligence test * Photochemical Reflectance Index * Pulse repetition interval * Praslin Island Airport (IATA:PRI), Seychelles *Political parties
* Independent Regionalist Party, Chile * Institutional Republican Party, Guatemala *Research organizations
* Pacific Research Institute, California, US * Paleontological Research Institution, Ithaca, New York, US * Penal Reform International, an international organisation * Population Research Institute (organization), Virginia, US, anti-contraception and abortion * Prairie Research Institute, scientific body comprising the Natural History, Archaeology, Geology and Water surveys of IllinoisTechnology
* Cromemco PRI printer interface card * Primary Rate Interface, telecommunication standardOther uses
* PRI disease resistant apple breeding program * Principles for Responsible Investment, UN initiative {{disambiguation