PEP
- British Rail Classes 445 and 446
- Deutsche Post
- ERCP
- Emergency Alert System
- GMA New Media
- Lights (musician)
- Pacific Equity Partners
- Packetized Ensemble Protocol
- Pairwise error probability
- Peak envelope power
- Pep (album)
- Pep (disambiguation)
- PepsiCo
- Performance-enhancing proxy
- Personal equity plan
- Philippine Entertainment Portal
- Phosphoenolpyruvic acid
- Political and Economic Planning
- Politically exposed person
- Polyestradiol phosphate
- Portuguese passport
- Post-exposure prophylaxis
- Primate Equilibrium Platform
- Priority Enforcement Program
- Progressive Empowerment Party
- Progressive except Palestine
- Promoting Enduring Peace
- Propellants, Explosives, Pyrotechnics
- Proton–proton chain
- Provincial Emergency Program (British Columbia)
- Psychoanalytic Electronic Publishing
- Pulsed energy projectile
- Python Enhancement Proposal
- Stanford Linear Accelerator Center
- XACML
- Xerox Network Systems