Per

Per or PER may refer to:

Places

• Peru (IOC country code)
• Pér, a village in Hungary
• Perthshire (Chapman code), historic county in Scotland

Science and technology

• Physics education research
• Packed Encoding Rules, in computing, an ASN.1 wire format
• Per (storm), a January 2007 storm in Sweden

Mathematics

• Rate (mathematics), ratio between quantities in different units
• Price–earnings ratio, in finance, a measure of growth in earnings
• Player efficiency rating, a measure of basketball player performance
• Partial equivalence relation, class of relations that are symmetric and transitive

Science

• Perseus (constellation) (standard astronomical abbreviation)
• Period (gene) or per, that regulates the biological clock and its corresponding protein PER
• Protein efficiency ratio, of food
• PER or peregrinibacteria, a candidate bacterial phylum

Media and entertainment

• PeR (band), a Latvian pop band
• Per (film), a 1975 Danish film

Transport

• Perth Airport (IATA code), in Western Australia
• Penrhiwceiber railway station (National Rail station code), Rhondda Cynon Taf, Wales
• Perambur railway station (Indian Railways station code), Chennai, India

Other uses

• Per (given name), a Scandinavian form of Peter
• Per sign (⅌), a symbol used to indicate a ratio

See also

• Per capita
• Perr (disambiguation)
• Pers (disambiguation)
• Purr (disambiguation)