| Acronym | Meaning |
 | PDB | Performance Data Book |
| PDB | Power Distribution Box |
| PDC | Predefined Command |
| PDC | Procurement Document Change |
| PDCR | Proprietary Data Control Record |
| PDCS | Power Distribution And Control System (Subsystem) |
| PDF | Pocket Dosimeter FEMA |
| PDH | Pocket Dosimeter High |
| PDH | Pocket Dosimeter-High |
| PDI | Payload Data Interleaver |
| PDI | Payload DePloyment And Retrieval System |
| PDL | Pocket Dosimeter Low |
| PDL | Pocket Dosimeter-Low |
| PDL | Procedure Distribution List |
| PDL | Program Design Language |
| PDM | Processor Data Monitor |
| PDM | Pulse Duration Modulation |
| PDM/FM | Pulse Duration Modulation/Frequency Modulation |
| PDP | Plasma Diagnostics Package |
| PDP | Postinsertion Deorbit Preparation |
| PDP | Preliminary Definition Plan |
| PDP | Procurement Data Package |
| PDP | Program Development Plan |
| PDP | Project Definition Phase |
| PDR | Preliminary Data Requirements |
| PDR | Preliminary Design Review |
| PDR | Processed Data Recorder |
| PDR | Program Design Review |
| PDR | Program Director's Review |
| PDRD | Procurement Data Requirements Document |
| PDRL | Procurement Data Requirements List |
| PDRM | Payload Deployment And Retrieval Mechanism |
| PDRS | Payload Data And Retrieval System |
| PDRS | Payload Deployment And Retrieval System |
| PDRS | Payload Deployment And Retrieval System(s) |
| PDRSS | Payload Development And Retrieval System Simulator |
| PDRSTA | Payload Deployment And Retrieval System Test Article |
| PDS | Package Data System |
| PDS | Partitioned Data Set |
| PDS | Power Distribution System (Subsystem) |
| PDS | Problem Data System |
| PDU | Pilot Display Unit |
| PDU | Power Drive Unit |
| PDU | Power Drive Unit |
| PDU | Pressure Distribution Unit |
| PDU | Pulse Detection Unit |
| PDV | Pressure Disconnect Valve |
| PE | Project Engineer |
| PEAP | Personal Egress Air Pack |
| PEB | Performance Evaluation Board |
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