PEM

PEM or Pem may refer to:

Science and technology

 * Photoelastic modulator, an optical device
 * Polyelectrolyte multilayer, thin films
 * Proton-exchange membrane, semipermeable
 * Porous European Mix, another name for asphalt concrete

Computing and electronics

 * Plastic encapsulated microcircuits, a method for packaging microcircuits
 * Power entry module, used in electrical appliances
 * PCI Express Mini, a computer bus standard
 * Privacy-Enhanced Mail, whose file format is also often used for X.509 certificates

Medicine

 * Polioencephalomalacia
 * Protein–energy malnutrition
 * Pediatric emergency medicine
 * Positron emission mammography, a nuclear medicine imaging modality
 * Post-exertional malaise

Places

 * Peabody Essex Museum, an art and historical museum located in Salem, Massachusetts, US
 * Padre Aldamiz International Airport (IATA code), Madre de Dios, Peru
 * Pemberton railway station (National Rail station code), England
 * Pembrokeshire (Chapman code), a county in Wales

People

 * Pem Sluijter (1939–2007), Dutch poet

Other uses

 * PEM nut or swage nut, a type of nut or threaded insert
 * Private electronic market, using the Internet to connect select parties in one market