| Abbreviation | Definition |
|---|---|
| PORT | Photo-Optical Recorder Tracker |
| POS | Point Of Stress |
| POT | Power Over Time |
| PP | Physical Principle |
| PP | Plasma Physics |
| PPA | Particle Physics and Astrophysics |
| PPAP | Particle Physics Advisory Panel |
| PPCF | Plasma Physics and Controlled FusionTM |
| PPD | Particle Physics Division |
| PPM | Pure Permanent Magnet |
| PPN | Physics of Particles and Nuclei |
| PPNS | Particle Physics at Neutron Sources |
| PPOF | Probabilistic Physics of Failure |
| PPP | Physics for Paper and Print |
| PPU | Physics processing unit |
| PQ | Photon To Quark |
| PQL | Practical Quantitation Level |
| PQP | Physlet Quantum Physics |
| PQS | Parallel Quantum Solution |
| PR | PRobability of .... |