| Abbreviation | Definition |
|---|---|
| PRECA | Puerto Rico Electrical Contractors Association |
| PREED | Portal for Registration Electronic Enforcement and Display |
| PREL | Power Refrigeration And Electrical Laboratory |
| PREN | Pitting Resistance Equivalence Number |
| PRI | Pulse Repetition Interval |
| PRL | Physical Review Letters |
| PRML | Partial Response Maximum Likelihood |
| PRN | Pseudo-Random Noise |
| PROG | Progression |
| PROM | Programmable Read-Only Memory |
| PRPS | Pseudo Random PRF Stagger |
| PRS | Pseudo-Random Sequence |
| PRSC | Parametric Response Surface Control |
| PRT | Planar Resistor Technology |
| PRT | Platinum Resistance Thermometer |
| PRT | Purge Resonance Technology |
| PRTP | Private Rate of Time Preference |
| PS | Polar Stereographic |
| PS | Porous Silicon |
| PS | Pulse Shape |