Wikipedia
PEM
PEM may stand for:
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in science
- Photoelastic modulator
- Polyelectrolyte multilayer
- Positron emission mammography
- Proton exchange membrane or Polymer Electrolyte Membrane – as in "fuel cell", applications include use in proton-exchange fuel cells, used to manipulate hydrogen for energy conversion
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in engineering
- Professional Engineering Manager, a professional certification by the American Society for Engineering Management
- Professional Energy Manager, a professional certification by the Institute of Energy Professionals
- Power Entry Module
- PEM nut Self Clinching nut - commonly referred to as 'PEM'
- Porous European Mix – a type of asphalt used on roads and airport runways, commonly referred to as PEM
- Portable Emissions Measurement System (PEMS)
- Predictive Emission Monitoring System (PEMS)
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in computing
- PCI-Express mini, a computer bus standard
- Privacy Enhanced Mail, sometimes Privacy-Enhanced Electronic Mail
- The .pem filename extension is used for a Base64-encoded X.509 certificate
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in medicine
- Polioencephalomalacia
- Post-Exertion Malaise
- Protein-energy malnutrition
- Pediatric emergency medicine
- Peabody Essex Museum
- Professional Emergency Manager
- Principle of excluded middle
- The IATA code for the Padre Aldamiz International Airport in Puerto Maldonado, Madre de Dios, Peru
- Pemberton railway station, England; National Rail station code PEM
- Puritanical Euphoric Misanthropia