| Acronym | Definition |
|---|
| PIR➣Parents In Room (chat) |
| PIR➣Post(-mortem) Incident Review |
| PIR➣Passive Infrared |
| PIR➣Parachute Infantry Regiment |
| PIR➣Protein Information Resource |
| PIR➣Public Interest Registry |
| PIR➣Price Is Right (TV show) |
| PIR➣Polyisocyanurate |
| PIR➣Property Irregularity Report (reporting lost/damaged luggage at an airport) |
| PIR➣Phoenix International Raceway |
| PIR➣Perhentian Island Resort (Malaysia) |
| PIR➣Portland International Raceway (Portland, OR) |
| PIR➣Prescribed Investor Rate (New Zealand) |
| PIR➣Post Implementation Review |
| PIR➣Private Information Retrieval (cryptography protocol/concept) |
| PIR➣Philadelphia International Records (record label; est. 1971) |
| PIR➣Pediatrics in Review (American Academy of Pediatrics) |
| PIR➣Partners in Recovery (various locations) |
| PIR➣Program Information Report |
| PIR➣Position in Range |
| PIR➣Peak Information Rate (frame relay) |
| PIR➣Project Implementation Report |
| PIR➣Partners in Rhyme (music) |
| PIR➣Pass In Review (military) |
| PIR➣Peak Information Rate |
| PIR➣Processor Identification Register |
| PIR➣Periodic Inspection Report (electrical report; UK) |
| PIR➣Partners in Reading (education) |
| PIR➣Priority Intelligence Requirement |
| PIR➣Precision Infrared Radiometer (scientific measuring device) |
| PIR➣Public Information Request (public disclosure; various locations) |
| PIR➣Paducah International Raceway (Kentucky; est. 1972) |
| PIR➣Post Incident Review |
| PIR➣Probabilistic Information Retrieval |
| PIR➣Patient Information Reconciliation (medical workflow) |
| PIR➣Protein Identification Resource |
| PIR➣Priority Information Requirements |
| PIR➣Pacific Islands Regiment |
| PIR➣Pocono International Raceway |
| PIR➣Public Infrastructure Renewal (Canada) |
| PIR➣Posição Inicial de Retardamento (Portuguese: Starting Position Delay) |
| PIR➣Protocol Independent Routing |
| PIR➣Professors in Residence (various schools) |
| PIR➣Partners in Injury Reduction (Alberta, Canada) |
| PIR➣Property Inspection Report |
| PIR➣Project Implementation Review (systems development methodology) |
| PIR➣Project Interim Report (various organizations) |
| PIR➣Practitioner-in-Residence (various organizations) |
| PIR➣Police Incident Report (various locations) |
| PIR➣Payment Information Repository (US Department of the Treasury) |
| PIR➣Precision Instrument Runway (aviation) |
| PIR➣Police Initial Recruitment Test (UK; also seen as PIRT) |
| PIR➣Public Interest Review |
| PIR➣Property Insurance Report |
| PIR➣Perpetual Inventory Record |
| PIR➣Phillips Investment Resources |
| PIR➣Perception Is Reality |
| PIR➣Potential Impact Radius (natural gas pipeline) |
| PIR➣Pierre, SD, USA - Pierre Municipal Airport (Airport Code) |
| PIR➣Pittsburgh Industrial Railroad |
| PIR➣Proportionate Injury Ratio (statistic) |
| PIR➣Planned Independent Requirement |
| PIR➣Post Incident Report (computer networking) |
| PIR➣Project Initiation Report (information management) |
| PIR➣Photo Interpretation Report |
| PIR➣Problem Identification Report |
| PIR➣Portable ILS Receiver |
| PIR➣Philippine Independence Ribbon |
| PIR➣Periodic Intelligence Review |
| PIR➣Personnel Information Roster |
| PIR➣Purchase Information Record |
| PIR➣Photon Irradiance Response |
| PIR➣Product Ingredient Review (Consumer Specialty Products Association) |
| PIR➣Planned Inventory Retrieval |
| PIR➣Problem Investigation Report |
| PIR➣Pressure Ignition Rocket |
| PIR➣Permanent Impairment Rate (worker's compensation) |
| PIR➣Proportional-Intensity-Reduction |
| PIR➣Product Improvement Report |
| PIR➣Private Inspector-Residential (wastewater management) |
| PIR➣Preliminary Inspection Requirements |
| PIR➣Provisional Integrated Rating |
| PIR➣Primary Intelligence Requirement |
| PIR➣Procurement Information Reporting |
| PIR➣Planned Installation Report |
| PIR➣Process Information Report |
| PIR➣Program Incident Report |
| PIR➣Private Investment Reserve, LLC (Newport Beach, CA) |
| PIR➣Problem Investigation Request |