- is the term for a Pilgrimage site in Persian , frequently one of the Zoroastrian faith
- , King Of The Britons
- '' is the Persian word for "old". When preceding a Persian name, the word indicates Homage payed to the so titled, usually a Sage or wise Elder
- is an acronym for the Protein Information Resource , a major protein information database and Bioinformatics resource
- is an acronym for Partners In Research , a Canadian charity dedicated to Bio-medical research
- is an acronym for Parrot Intermediate Representation , part of Parrot
- is an acronym for Passive Infrared Sensors , and often used as part of a security system
- is an acronym for Parachute Infantry Regiment
- is an acronym for the Public Interest Registry , a not-for-profit corporation responsible for managing the .org top-level domain.
- is an acronym for Public Information Research , a non-profit corporation that maintains Namebase , an online database of citations to influential people
- is an acronym for Private Information Retrieval , a protocol that allows a user to retrieve an item from a server in possession of a database without revealing which item she is retrieving.
- is Polyisocyanurate , a plastic typically produced as a foam for thermal insulation
- , signifying to people in Chat Rooms or Instant Message conversations that someone's parents are in the room and to watch what is said.
- is an acronym for the Ontario Ministry of '''Public Infrastructure Renewal'''
- is also an acronym for '''Post-Implementation Review'''
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