the IOC country code for Peru.

Per, the gender-neutral possessive pronoun used by the inhabitants of the future feminist and anarchist utopia in Marge Piercy's novel Woman on the Edge of Time.

the IATA code for Perth Airport in Western Australia.

PE ratio, price-to-earnings ratio, used in finance.

Perseus (constellation) (standard astronomical abbreviation)

Player Efficiency Rating, a basketball statistic.

Partial equivalence relation.

Per (storm), a storm in Sweden, in January 2007.

Packed Encoding Rules, a set of ASN.1 encoding rules for formatting data in binary.

Period (gene)

Protein efficiency ratio, a method used for evaluating the quality of protein in food.

the official abbreviation of the Western Australian Herbarium

a common first name in Scandinavia. A form of Peter which means "rock" or "cliff" in Latin.

Pér, a village in Hungary