PEM or Pem may refer to:

People

* Pem Sluijter (1939–2007), Dutch poet

Science

Photoelastic modulator A photoelastic modulator (PEM) is an optical device used to modulate the polarization of a light source. The photoelastic effect is used to change the birefringence of the optical element in the photoelastic modulator. PEM was first invented by ...

Polyelectrolyte Polyelectrolytes are polymers whose repeating units bear an electrolyte group. Polycations and polyanions are polyelectrolytes. These groups dissociate in aqueous solutions (water), making the polymers charged. Polyelectrolyte properties are th ...

multilayer *

Positron emission mammography Positron emission mammography (PEM) is a nuclear medicine imaging modality used to detect or characterise breast cancer. Mammography typically refers to x-ray imaging of the breast, while PEM uses an injected positron emitting isotope and a dedica ...

Proton exchange membrane A proton-exchange membrane, or polymer-electrolyte membrane (PEM), is a semipermeable membrane generally made from ionomers and designed to conduct protons while acting as an electronic insulator and reactant barrier, e.g. to oxygen and hydrogen g ...

, semipermeable

Engineering

Plastic encapsulated microcircuits Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be moulded, extruded or pressed into solid objects of various shapes. This adaptab ...

, a method for packaging microcircuits *

Power entry module {{Unreferenced, date=March 2011 A power entry module (PEM) is an electromechanical component used in electrical appliances, integrating the appliance inlet with other components such as: * a switch, possibly including integrated or remote bowde ...

PEM nut PEM or Pem may refer to: People * Pem Sluijter (1939–2007), Dutch poet Science * Photoelastic modulator * Polyelectrolyte multilayer * Positron emission mammography * Proton exchange membrane, semipermeable Engineering *Plastic encapsulated m ...

or self-clinching nut

Computing

* PCI Express Mini, a computer bus standard *

Privacy-Enhanced Mail Privacy-Enhanced Mail (PEM) is a de facto file format for storing and sending cryptographic keys, certificates, and other data, based on a set of 1993 IETF standards defining "privacy-enhanced mail." While the original standards were never broadl ...

, whose file format is also often used for

X.509 In cryptography, X.509 is an International Telecommunication Union (ITU) standard defining the format of public key certificates. X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, the secur ...

certificates

Medicine

Polioencephalomalacia Polioencephalomalacia (PEM), also referred to as cerebrocortical necrosis (CCN), is a neurological disease seen in ruminants that is caused by multiple factors, one of which is thiamine depletion in the body. Thiamine (vitamin B1) is a key chemic ...

* Protein-energy malnutrition *

Pediatric emergency medicine Pediatric emergency medicine (PEM) is a medical subspecialty of both pediatrics and emergency medicine. It involves the care of undifferentiated, unscheduled children with acute illnesses or injuries that require immediate medical attention. While ...

Post-exertional malaise Post-exertional malaise (PEM) is a worsening of chronic fatigue syndrome Chronic fatigue syndrome (CFS), also called myalgic encephalomyelitis (ME) or ME/CFS, is a complex, debilitating, long-term medical condition. The Pathophysiology, caus ...

Other

* Parallel Economic Model, a theoretical dual economy model *

Peabody Essex Museum The Peabody Essex Museum (PEM) in Salem, Massachusetts, US, is a successor to the East India Marine Society, established in 1799. It combines the collections of the former Peabody Museum of Salem (which acquired the Society's collection) and the ...

, an art and historical museum located in Salem, Massachusetts, US *

Padre Aldamiz International Airport Padre Aldamiz International Airport , also known as Puerto Maldonado International Airport, is an airport serving the city of Puerto Maldonado in the Madre de Dios Region of Peru. The airport oversees a small number of domestic (national) comme ...

, Madre de Dios, Peru, IATA code *

Pemberton railway station Pemberton railway station serves the Pemberton area of Wigan in Greater Manchester, England. It is on the Kirkby branch line from Wigan Wallgate. The station was opened on 20 November 1848 by the Liverpool and Bury Railway. It on the A571 Bi ...

, England; National Rail station code * Pembrokeshire, county in Wales, Chapman code *