| Abbreviation | Definition |
|---|---|
| PRACK | Provisional Response ACKnowledgement |
| PRBS | Pseudo-Random Binary Sequence |
| PRBT | Personal Ring Back Tone |
| PRD | Pseudo-Random Downstream |
| PRL | Preferred Roaming List |
| PRM | Performance Report Message |
| PRN | Pseudo-Range Node |
| PRS | Primary Reference Source |
| PRU | Pseudo-Random Upstream |
| PS | Phone Service |
| PSC | Packet Switched Call |
| PSDS | Public Switched Digital Service |
| PSELFEXT | Power Sum Equal Level Far End Cross Talk |
| PSK | Phase-Shift Keying |
| PSLV | Polar Satellite Launch Vehicle |
| PSN | Packet Switched Network |
| PSN | Personal Subscription Number |
| PSN | Public Switched Network |
| PSNEXT | Power Sum Near End Cross Talk |
| PSP | Payphone Service Provider |