| Abbreviation | Definition |
|---|---|
| PSS | Payload Specialist Station |
| PSSA | Pad Safety Supervisor |
| PSSA | Presidents Social Service Award |
| PSSP | Payload Support Structural Assembly |
| PSST | Payload Specialist Station Panel |
| PSSU | Periodic Significant Scheduled Tasks |
| PSTF | Patch Survey and Switching Unit |
| PSTN | Public Switched Telephone Network |
| PSTS | Payload Spin Test Facility |
| PSU | Public sector Undertaking |
| PSU | Payload Module |
| PSU | Power Supply Unit |
| PSU | Power Switching Unit |
| PSV | Power Sensor Unit |
| PSVT | Paroxysmal Supra-Ventricular Tachycardia |
| PSW | Process Status Word |
| PSW | Personal Support Worker |
| PSW | Planetary Space Vehicle |
| PSY | Psychology |
| PT | Physical Training |
| PT | Perpetual Traveler |
| PT | Physical Therapist |
| PT | Physical Torturer |
| PT | Program Status Word |
| PT | Pressure Transducer |
| PT | Advanced Planning and Technology Office |
| PTA | Parent Teacher Association |
| PTA | Pilotless Target Aircraft |
| PTA | Parent-Teachers Association |
| PTA | Personal Travel Assistant |
| PTA | Propulsion Test Article |
| PTA | Potential Toxic Area |
| PTA | Post-Test Analysis |
| PTB | Payload Timing Buffer |
| PTBT | Partial Test Ban Treaty |
| PTC | Professional Technical And Clerical |
| PTC | Passive Thermal Control |
| PTC | Portable Temperature Controller |
| PTC | Payload Training Complex |
| PTC | Percutaneous Transhepatic Cholangiography |
| PTCA | Percutaneous Transluminal Coronary Angioplasty |
| PTCM | Purified Tumor Cell Membrane |
| PTCR | Pad Terminal Connection Room |
| PTCS | Payload Module Thermal Control Subsystem |
| PTCS | Propellant Tanking Computer System |
| PTCS | Payload Test and Checkout System |
| PTCS | Passive Thermal Control System |
| PTCS | Passive Thermal Control Section |
| PTD | Professional Technical Development |
| PTD | Provisioning Technical Documentation |