1, The full form of PIR is Pilar Airport. It’s used on Transport & Travel ,Airport Codes in Paraguay

Pilar Airport (IATA Code: PIR) is an airport in Pilar, Paraguay.

2, The full form of PIR is Passive Infrared. It’s used on Academic & Science ,Electronics in Worldwide

A Passive Infrared sensor (PIR sensor) is an electronic device which can detect levels of infrared radiation from objects in its field of view. PIRs are basically made of a pyroelectric sensor which can detect levels of infrared radiation. All objects above absolute zero emit energy in the form of radiation and if the body is hotter it emits more radiation. Thus the PIR sensor detects motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. Infrared radiation is invisible to the human eye but can be detected by electronic devices designed for such a purpose. The term passive in this instance means that the PIR device does not emit an infrared beam but passively accepts incoming infrared radiation and “Infra” meaning below our ability to detect.

3, The full form of PIR is Protein Information Resource. It’s used on Academic & Science ,Research & Development in United States

The Protein Information Resource (PIR) is an integrated public bioinformatics resource to support genomic and proteomic research, and scientific studies located at Georgetown University Medical Center, Washington, D.C.

4, The full form of PIR is Portland International Raceway. It’s used on Sports & Games ,Motorsports in United States

Portland International Raceway (PIR) is located in Portland, Oregon, United States.