| Acronym | Meaning |
 | PS | Pressure Switch Mpower Steering |
| PS | Probability Of Survival |
| PS/PC | Physical Security/pilferage Code |
| PSA | Problem Statement Analyzer |
| PSD | Power Demand Signal |
| PSDP | Preliminary System Design Plan |
| PSE | Peculiar Support Equipment |
| PSE | Project Support Environment |
| PSESWG | Programming Support Environment Software Working Group |
| PSI | Pounds Per Square Inch |
| PSIA | Pounds Per Square Inch Absolute |
| PSIC | Provisioning System Identifier Code |
| PSID | Pounds Per Square Inch Differential |
| PSIG | Pounds Per Square Inch Gauge |
| PSL | Problem Statement Language |
| PSL/PPL | Process Support Language/process Programming Language |
| PSM | Processor Support Module |
| PSMD | Preliminary Ship Manpower Document |
| PSO | Pressure Shut Off |
| PSO/NO-AIR | Pressure Shut Off No Air |
| PSP | Programmable Signal Processor (an/awg-9 Update) |
| PSTAT | Precipitation Static |
| PT | Part |
| PT | Plain Test |
| PT | Point |
| PT | Point Mode |
| PTA | Proposed Technical Approach |
| PTD | Provisioning Technical Documentation |
| PTEL | Prequalified Training Equipment List |
| PTEP | Prequalified Training Equipment Program |
| PTOR | Power Turn On Reset |
| PTP | Program Test Plans |
| PTPR | Program Test Procedures And Reports |
| PTR | Problem Trouble Report |
| PTT | Part Task Trainer |
| PTT | Plotting Team Trainer |
| PTT | Push To Talk |
| PTTI | Precise Time And Time Interval Dissemination And Distribution |
| PVC | Polyvinyl Chloride |
| PVS | Periscope View Simulators (associated With 21a Series) |
| PVSG | Periscope Visual Scene Generator |
| PW | Pulse Width |
| PWB | Printed Wiring Board |
| PWR | Power |
| PWR | Prepositioned War Reserves |
| PWR/GND | Power/ground |
| PY | Program Year |
| Q | Torque |
| Q/I | Question/issue |
| QA | Quality Assurance |
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