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Pacific Electric Railway

Air Europe Italy (IATA airline designator)

Peru (ISO 3166-1 alpha-2 country code, NATO country code)

Peterborough: PE is the British post code for the region in eastern England which is served by Peterborough postal sorting office. (See list of UK areas). This is sub-divided into numbered districts. (See list of UK districts). These are further sub-divided into individual premises or small groups of premises.

Prince Edward Island (Canadian Province/Territory Code)

AEG PE, a German World War I armored ground attack aircraft

Pain Easer, a rare weapon in MMORPG Neocron

Parasite Eve

Provider Edge router - in MPLS networking

PE ratio - price-to-earnings ratio (used in finance)

Physical education

Pixelated Empire * - Webcomic community

Polyethylene (PE) a common plastic polymer

Port Elizabeth, a city in South Africa

Portable Executable file format

Potential Energy

Private equity

Private Eye, a character class in the MMORPG Neocron

Practice of Engineering exam

Premature ejaculation

Processing Element -- see Parallel computing

Professional Engineer

Protocol encryption

Project Entropia, a MMORPG

Public Enemy (Rap group)

pulmonary embolism

phycoerythrin, a phycobiliprotein used as a fluorescent marker in microscopy and flow cytometry, as in PE-Goat antihuman IgG

One of the two ancient Egyptian towns which merged to become Buto

The letter Pe in many Semitic alphabets

The letter Pe (П) in the Cyrillic alphabet (derived from the Semitic letter via the Greek alphabet)

The letter $wp$ that appears in Mathematical literature, for example, the Weierstrass's elliptic functions $wp(z)$

Pe is one of the transliterations of the fourth syllable in Buddhist "Six syllable mantra" Om mani padme hum.

Pe, a text editor for the BeOS operating system

Pe, a town on the Tsangpo in Tibet.

A colloquial abbreviation of the name of Spanish actress Penélope Cruz.

Péclet number, in physics