Other
- Parachute infantry regiment, a unit of airborne forces
- Ministry of Public Infrastructure Renewal (Ontario), a former ministry of the Government of Ontario
- The Price Is Right (US game show), a TV gameshow
- Pittsburgh Industrial Railroad
- Performance Index Rating, a statistical formula used in basketball
- Pier 1 Imports, NYSE symbol PIR, a Texas-based retailer specializing in imported home furnishings and decor
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