The meaning of the Acronym PIR is...

PIR is

• Portland International Raceway
• Phoenix International Raceway

More Meanings For PIR:

• Processor Information ROM
• Priority Information Report
• Parents In Room
• Periodic Interest Rate
• Protein Information Resource
• Pier 1 Imports, Inc.
• Pile Installation Recorder
• Problem Identification Report
• Priority Information Requirement
• Priority Intelligence Requirements
• Primary Image Record
• Passive Infra Red
• Pass In Review
• Post Implementation Review
• Para Infantry Regiment

PIR is also in:

• Chat
• Hardware
• Human Genome
• Mathematics
• Military
• NYSE Symbols
• Products
• Security