| Abbreviation | Definition |
|---|---|
| PSS | Payload Support System |
| PSS | Portable Spacecraft Simulator |
| PSS | Propellant Supply Subsystem |
| PSS | Propulsion Support System |
| PSSA | Payload Support Structural Assembly |
| PSSC | Pico-Satellite Solar Cell Experiment |
| PSSP | Payload Specialist Station Panel |
| PSST | Periodic Significant Scheduled Task |
| PSSU | Patch Survey and Switching Unit |
| PSTF | Payload Spin Test Facility |
| PSTS | Payload Module |
| PSU | Power Sensor Unit |
| PSU | Power Supply Unit |
| PSU | Power Switching Unit |
| PSV | Planetary Space Vehicle |
| PSW | Program Status Word |
| PT | Advanced Planning and Technology Office |
| PT | PinT |
| PT | Pitch Trim |
| PT | Pressure Transducer |