| Acronym | Meaning |
 | PAR | Parts Approved Request |
| PARM | Participating Manager |
| PAT | Preliminary Acceptance Trials |
| PAT | Process Action Team |
| PATT | Pattern |
| PAX | Passengers |
| PAX | Patuxent River |
| PB | Patrol Boat (coastal Patrol Combatants) |
| PBIT | Periodic Built-in Test |
| PBR | River Patrol Boat (river/roadstead Craft) |
| PCA | Physical Configuration Audit |
| PCB | Printed Circuit Board |
| PCC | Procurement Contracting Office |
| PCCL | Pre-contract Cost Letter |
| PCCN | Provisioning Contract Control Number |
| PCD | Program Change Decision |
| PCF | Patrol Craft (fast) (coastal Patrol Combatants) |
| PCI | Product Configuration Identification |
| PCIS | Portable Common Interface Set |
| PCL | Post Conference List |
| PCM | Power Converter Module |
| PCM | Pulse Code Modulation |
| PCN | Program Change Notice |
| PCO | Procurement Contracting Officer |
| PCOTES | Prototype Carrier Operational Test And Evaluation System |
| PCR | Program Change Request |
| PCSB | Pulse Coded Scanning Beam |
| PCTE | Portable Common Tools Environment |
| PCTL | Percentile |
| PD | Preliminary Design |
| PD | Program Director |
| PD | Project Director |
| PD | Position Description |
| PDA | Principal Development Activity |
| PDAG | Process Definition Advisory Group |
| PDD | Program Design Description |
| PDD | Program Description Document Udi-e-21251a/mod |
| PDE | Projected Operational Environment |
| PDES | Product Data Evolvement System |
| PDES | Product Data Exchange Specification |
| PDL | Preliminary Design Language |
| PDL | Program Design Language |
| PDM | Program Objectives Memorandum |
| PDMLR | Post Deployment Maintenance Logistic Review |
| PDP | Power Distribution System |
| PDP | Program Definition Phase |
| PDR | Preliminary Design Review |
| PDREP | Product Deficiency Reporting And Evaluation Program |
| PDS | Power Demand Signal |
| PDS | Program Design Spec Udi-e-21268b/mod |
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