PRR may refer to: *

Parietal reach region The parietal reach region (PRR) is a region within the posterior parietal cortex of the macaque brain that is stimulated through reaching for an object. The PRR was initially proposed by Andersen Andersen () is a Danish- Norwegian patronymic sur ...

, of the human brain *

Pattern recognition receptor Pattern recognition receptors (PRRs) play a crucial role in the proper function of the innate immune system. PRRs are germline-encoded host sensors, which detect molecules typical for the pathogens. They are proteins expressed mainly by cells of th ...

, receptors of the innate immune system that identify pathogen-associated molecular patterns *

Pennsylvania Railroad The Pennsylvania Railroad ( reporting mark PRR), legal name as the Pennsylvania Railroad Company, also known as the "Pennsy," was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania. At its ...

(reporting mark), an American railroad *

Personal Role Radio The H4855 Personal Role Radio (PRR) is a small UHF transmitter-receiver issued to the British Armed Forces. It is used by the British Army, Royal Marines, Royal Navy and the Royal Air Force Regiment. The radio has a range of 500 meters, w ...

, a radio carried by UK troops *

Pichi Richi Railway Pichi Richi Railway is a narrow-gauge heritage railway in the southern Flinders Ranges of South Australia between Quorn and Port Augusta. For much of its length the line lies in the picturesque Pichi Richi Pass, where the line was completed i ...

, a heritage railway in South Australia * Populist radical right, a loose collection of political ideologies * Porsche Rennsport Reunion, an automotive event * Princes Risborough railway station (National Rail station code), England *

Production Rule Representation The Production Rule Representation (PRR) is a proposed standard of the Object Management Group (OMG) that aims to define a vendor-neutral model for representing production rules within the Unified Modeling Language (UML), specifically for use in for ...

, a proposed computing standard *

Proportional reporting ratio The proportional reporting ratio (PRR) is a statistic that is used to summarize the extent to which a particular adverse event is reported for individuals taking a specific drug A drug is any chemical substance other than a nutrient or an es ...

, a statistic used in data mining for health surveillance systems * Pseudo-response regulator, a group of genes that are important in the circadian oscillator of plants * Pure Reason Revolution, a British rock group formed in 2003 *

Rio-grandense Republican Party The Republican Party of Rio Grande do Sul (, PRR) was a Brazilian political party founded on February 23, 1882. It was dissolved in 1937 due to the Estado Novo. References Political parties of the First Brazilian Republic Defunct politi ...

(Portuguese: ''Partido Republicano Rio-Grandense''), a defunct Brazilian political party

See also