| Subject | English | Thesaurus |
| ecol., abbr. | Engineering Experimental Phase of Buoy Program | EEP |
| abbr., nucl.pow. | F-P phase transition | ferromagnetic-paramagnetic transition (MichaelBurov) |
| abbr., nucl.pow. | F-P phase transition | ferromagnetic-paramagnetic phase transition (MichaelBurov) |
| abbr., scottish | Japan Reconfiguration & Digitisation Program Phase III | JRD-3 (USA) |
| el., abbr. | Phase Shift Mask | PSM |
| comp., abbr. | Phase Transition | PT |
| abbr., scottish | Product Improvement Phase / Programme | PIP |
| NASA, abbr. | Program Definition and Risk Reduction life cycle phase | PDRR |
| abbr., scottish | Programme Definition Phase | PDP |
| phys., abbr. | Quantum Phase Transition | QPT |
