PEP

PEP may refer to:

Computing

 * Packetized Ensemble Protocol, used by Telebit modems
 * pretty Easy privacy (pEp), encryption project
 * Python Enhancement Proposal, for the Python programming language
 * Packet Exchange Protocol in Xerox Network Systems
 * Performance-enhancing proxy, mechanisms to improve end-to-end TCP performance
 * Policy Enforcement Point in XACML

Organizations

 * Political and Economic Planning, a British think tank formed in 1931
 * Priority Enforcement Program, in US immigration enforcement
 * Promoting Enduring Peace, a UN organization
 * Propellants, Explosives, Pyrotechnics, a journal
 * Provincial Emergency Program (British Columbia), the former name of Ministry of Emergency Management and Climate Readiness

Biology and medicine

 * Polyestradiol phosphate, an estrogen used to treat prostate cancer
 * Polymorphic eruption of pregnancy or pruritic urticarial papules and plaques of pregnancy
 * Post-exposure prophylaxis, preventive medical treatment
 * post-ERCP pancreatitis, a complication after endoscopic retrograde cholangiopancreatography
 * Phosphoenolpyruvic acid, a biochemical compound

Physics and Technology

 * Pep reaction, proton–electron–proton reaction
 * Peak envelope power of a transmitter

Other uses

 * Pairwise error probability in digital communications
 * Passaporte Electrónico Português, Portuguese electronic passport
 * PEP, a studio album by musician Lights
 * New York Stock Exchange symbol for PepsiCo
 * Personal equity plan, a former UK account type
 * Philippine Entertainment Portal, a website operated by GMA New Media
 * Politically exposed person, a financial classification
 * Positron-Electron Projects at Stanford Linear Accelerator Center
 * Post – eCommerce – Parcel, Divisions of Deutsche Post
 * Primary Entry Point, a station of the US Emergency Alert System
 * Primate Equilibrium Platform, used in animal experimentation
 * Progressive except Palestine, a pro-Palestinian political phrase
 * Prototype Electro-Pneumatic family of trains, British Rail Classes 445 and 446
 * Pulsed energy projectile, a non-lethal weapon