# PE

PE may refer to:

## Science and technology
### Computing and telecommunication

* P/E cycle of flash memory
* Phase encoding, another name for Manchester code
* Portable Executable, a computer file format
* Windows Preinstallation Environment, a lightweight version of Microsoft Windows
* Progressive enhancement, a strategy for web design
* Protocol encryption, a feature of some peer-to-peer file-sharing clients
* Provider edge router, a router between computer networks
* Project Euler, a problem solving website

### Medical conditions

* Pectus excavatum, a structural deformity of the anterior thoracic wall in which the sternum and rib cage are shaped abnormally
* Pleural effusion, excess fluid accumulation in the pleural cavity, the fluid-filled space surrounding the lungs
* Pre-eclampsia, a disorder of pregnancy
* Premature ejaculation
* Pulmonary embolism, a blockage of the pulmonary artery

### Medical interventions

* Penis enlargement
* Phenylephrine, a common over-the-counter decongestant
* Phenytoin equivalent, used to measure doses of fosphenytoin
* Physical exercise
* Prolonged exposure therapy, a form of behavior therapy designed to treat posttraumatic stress disorder

### Organic chemistry

* Pentaerythritol, a polyol
* Phenylephrine, a common over-the-counter decongestant
* Phenytoin equivalent, used to measure doses of fosphenytoin
* Phosphatidyl ethanolamine
* Phycoerythrin, a water-soluble protein used as a fluorescent marker in microscopy and flow cytometry
* Polyethylene, a common plastic polymer

### Physics

* Positron emission, a type of radioactive decay
* Potential energy, the energy stored in a body or in a system due to its position in a force field or due to its configuration
* Proton emission, a type of radioactive decay
* Protective earth, a type of electrical protective system
* Reduction potential, the negative logarithm of electron activity

### Other uses in science and technology

* AEG PE, a German World War I armored ground-attack aircraft
* Population equivalent, a concept used in sanitary engineering
* Present Era, a year numbering system commonly used in archaeology that uses 1950s as the epoch marker
* Professional Engineer, a post-nominal suffix indicating such a certification
* Primary energy, an energy form found in nature that has not been subjected to any human engineered conversion process
* A US Navy hull classification symbol: Patrol escort (PE)

## Arts and media

* "P.E." (Cow and Chicken), a 1998 television episode
* Parasite Eve (video game), on the original PlayStation
* Pineapple Express (film), a 2008 American action-comedy film starring Seth Rogen
* Power electronics (music), a type of noise music
* The Press-Enterprise, a newspaper serving the Inland Empire in Southern California
* Private eye, a character class in the MMORPG Neocron
* Public Enemy (group), a hip hop group from Long Island, New York
* Minecraft: Pocket Edition, the mobile version of the video game

## In business and economics

* P/E ratio, or price-to-earnings ratio
* Performance Evaluation, a journal
* Professional Engineer, a post-nominal suffix indicating such a certification
* Private equity, equity investments in companies that are not traded on a public stock exchange
* Permanent establishment, a fixed place of business establishing taxable presence of a business in a host country

## Businesses and organizations

* Air Europe Italy (IATA Code 1989–2008)
* People Express Airlines (1980s) (IATA Code 1981–1987)
* Pacific Electric, a defunct Los Angeles rail transit company
* PerkinElmer, an American technology company
* Army Police (Brazil), (Portuguese: Polícia do Exército) a Brazilian Army Police force
* Army Police (Portugal), (Portuguese: Polícia do Exército) a Portuguese Army Police force

## Places

* PE postcode area, UK, covering Peterborough
* Pernambuco, a state of Brazil
* Peru (ISO 3166-1 alpha-2 and NATO country code PE)
* Port Elizabeth, a city in South Africa
* Prince Edward Island, a Canadian province

## Other uses

* Pakistani English, the variant of English language spoken in Pakistan
* Physical education
* Princess Elizabeth Challenge Cup, a rowing event at Henley Royal Regatta