PEP may refer to:

Computing and telecommunications Packetized Ensemble Protocol, used by Telebit modems Pairwise error probability, in digital communications Peak envelope power of a transmitter 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 Progressive Empowerment Party, political party in Trinidad Promoting Enduring Peace, a UN organization Pacific Equity Partners, a private equity investment firm Propellants, Explosives, Pyrotechnics, a journal Provincial Emergency Program (British Columbia), the former name of Ministry of Emergency Management and Climate Readiness

Natural science 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 Pep reaction, proton–electron–proton reaction

Economics and finance New York Stock Exchange symbol for PepsiCo Personal equity plan, a former UK account type Politically exposed person, a financial classification

Other uses Passaporte Electrónico Português, Portuguese electronic passport PEP, a studio album by musician Lights PEP, a website operated by GMA New Media 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 Psychoanalytic Electronic Publishing, academic publisher of psychoanalysis Prototype Electro-Pneumatic family of trains, British Rail Classes 445 and 446 Pulsed energy projectile, a non-lethal weapon

See also Pep (disambiguation)