PE explained

PE may refer to:

Science and technology

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

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

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

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

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)

"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
, the mobile version of the video game

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

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