Look up per in Wiktionary, the free dictionary.

Per or PER can refer to:

• a Scandinavian form of Peter (name)
• Per (storm), a storm in Sweden, in January 2007
• the IOC country code for Peru
• the IATA code for Perth Airport in Western Australia
• PE ratio, price-to-earnings ratio, used in finance
• Player Efficiency Rating, a basketball statistic
• Partial equivalence relation
• Packed Encoding Rules, a set of ASN.1 encoding rules for formatting data in binary
• Protein efficiency ratio, a method used for evaluating the quality of protein in food
• the official abbreviation of the Western Australian Herbarium
• Perseus (constellation) (standard astronomical abbreviation)
• the stock symbol for Perot Systems Corporation
• Period (gene)
• Pér, a village in Hungary

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