PCG
- Conjugate gradient method
- Pacific Century Group
- Pacific Corporate Group
- Pacific Gas and Electric Company
- Parent company guarantee
- Penicillin G
- Pentecostal Church of God
- People's Consultative Group
- Permuted congruential generator
- Philadelphia Church of God
- Philippine Coast Guard
- Phonocardiogram
- Plan Comptable Général
- Poetae Comici Graeci
- Police Coast Guard
- Polycomb-group proteins
- Popular Combatants Group
- Positive Montenegro
- Procedural generation
- Professional Contractors Group
- Public Consulting Group
- Stack Exchange