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, neurological disease in ruminants Protein–energy malnutrition, malnutrition arising from insufficient protein or calories in one's diet Pediatric emergency medicine Positron emission mammography, a nuclear medicine imaging modality Post-exertional malaise, worsening of symptoms after a small amount of activity
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
See also