| Abbreviation | Definition |
|---|---|
| PS/FC | Power Supply/Fuel Cell |
| PSA | Payload Service Area |
| PSA | Payload Support Avionics |
| PSA | Power Servo Assembly |
| PSA | Preferred Storage Area |
| PSA | Pre-Sleep Activity |
| PSA | Pressure Switch Assembly |
| PSA | Provisions Stowage Assembly |
| PSAC | Presidential Scientific Advisory Committee |
| PSAV | Public Service Announcement Video |
| PSC | Parallel Switch Control |
| PSC | Program Schedule Chart |
| PSCL | Propellant Systems Cleaning Laboratory |
| PSCN | Preliminary Specification Change Notice |
| PSCN | Program Support Communications Network |
| PSD | Power Spectral Density |
| PSD | Program Support Document |
| PSDP | Payload Station Distribution Panel |
| PSDR | Planning and Scheduling Document Record |
| PSE | Payload Service Equipment |