| Abbreviation | Definition |
|---|---|
| PDN | Private Data Network |
| PDP | Packet Data Protocol |
| PDP | Parallel Distributed Processing |
| PDS | Parallel Directory Structure |
| PDS | Power and Download Station |
| PDS | Process Distribution System |
| PDS | Profile Directory Structure |
| PDSN | Policies for Distributed Systems and Networks |
| PDU | Packet Data Unit |
| PDU | Protocol Data Unit |
| PE | Provider Edge device |
| PEC | Peripheral Event Controller |
| PEF | Platform Event Filtering |
| PEL | Protocol Engineering Laboratory |
| PEOPLE | Public Employees Organized To Promote Legislative Equality |
| PER | Packet Encoding Rules |
| PERC | Portable Executive For Reliable Control |
| PERMALINK | PERMAnent LINK |
| PES | Packetized Elementary Stream |
| PES | Process Engineering Suite |