PEM

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

• 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

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

• 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

• Pem Sluijter (1939–2007), Dutch poet

• 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

{{canned search|pem}}

• {{srt}}
• {{lookfrom|pem}}

{{disambiguation|given name}}