| Acronym | Definition |
|---|
| P3 | Power of Three (Charmed) |
| P3 | Persona 3 (game) |
| P3 | Public-Private Partnership |
| P3 | Pentium III |
| P3 | Primary 3 (various schools) |
| P3 | Primavera Project Planner |
| P3 | Prue, Piper and Phoebe (TV show Charmed) |
| P3 | Platform for Privacy Preferences |
| P3 | People Planet Profit (Colorado Business for Social Responsibility) |
| P3 | Product, Price, Promotion (marketing analysis tool) |
| P3 | Parish Paths Partnership (UK) |
| P3 | Personalization Preparation Process |
| P3 | Preservation, Packaging and Packing |
| P3 | Pharmaceuticals Partnership Program (Australia) |
| P3 | Premeditated Personnel Parachuting |
| P3 | Preliminary Planning Process (US DoD) |
| P3 | Perception and Performance Prototyper |
| P3 | Past President, President, President-Elect (IEEE Computer Society) |
| P3 | MHS X.419 Remote UA Access Protocol |
| P3 | Program Prioritization Profile |
| P3 | Pre-Planning Package |
| P3 | Norsk Rikskringkasting Program 3 |
| P3 | Parallel Porting and Productizing |
| P3 | Precision Pulsed Plasma |