| Acronym | Meaning |
![](file.png) | SSO | Space Shuttle Orbiter |
![](file.png) | SSO | Subsystem Operation (in Spacelab) |
![](file.png) | SSO | SuPport System For OEX |
![](file.png) | SSOP | Space Systems Operating Procedure(s) |
![](file.png) | SSP | Small Sortie Payload |
![](file.png) | SSP | Space Shuttle Program |
![](file.png) | SSP | Standard Switch Panel |
![](file.png) | SSPC | Spacelab Stored Program Command |
![](file.png) | SSPD | Shuttle System Payload Data |
![](file.png) | SSPD | Shuttle System Payload Definition (Study) |
![](file.png) | SSPD | Shuttle System Payload Description |
![](file.png) | SSPDA | Space Shuttle Payload Data Activity |
![](file.png) | SSPDB | Subsystem Power Distribution Box |
![](file.png) | SSPDS | Space Shuttle Payload Data Study |
![](file.png) | SSPGSE | Space Shuttle Program Ground Support Equipment |
![](file.png) | SSPM | Space Shuttle Program Manager |
![](file.png) | SSPO | Space Shuttle Program Office |
![](file.png) | SSPP | SYstem Safety Program Plan |
![](file.png) | SSPPSG | Space Shuttle Payload Planning Steering Group |
![](file.png) | SSPRO | Space Shuttle Program Resident Office |
![](file.png) | SSPS | Space Shuttle Program Schedule |
![](file.png) | SSPTF | Santa Susana Propulsion Test Facility (see SSFL) |
![](file.png) | SSR | Shop Support Request |
![](file.png) | SSR | Staff SuPport Room |
![](file.png) | SSR | Station Set Requirement |
![](file.png) | SSR | System Requirements Review |
![](file.png) | SSRD | Station Set Requirements Documents |
![](file.png) | SSRN | System Software Reference Number |
![](file.png) | SSRR | Station Set Requirements Review |
![](file.png) | SSS | Sound Suppression System |
![](file.png) | SSS | Space ShuttleSystem |
![](file.png) | SSS | Stage Separation Subsystem |
![](file.png) | SSS | Station Set Specification |
![](file.png) | SSS | Subsystem Segment |
![](file.png) | SSSS | Space Shuttle System Specification |
![](file.png) | SST | Single System Trainer |
![](file.png) | SST | SPacecraft Systems Test |
![](file.png) | SST | Structural Static Test |
![](file.png) | SST | Subsystem Terminal On Spacelab |
![](file.png) | SSTC | Space Shuttle Test Conductor |
![](file.png) | SSUS | Spinning Solid Upper Stage |
![](file.png) | SSUS-A | SSUS For Atlas-Centaur Class Spacecraft |
![](file.png) | SSUS-D | SSUS For Delta Class Spacecraft |
![](file.png) | SSUSP | Spinning Solid Upper Stage Project |
![](file.png) | SSV | Space Shuttle Vehicle |
![](file.png) | ST | Self Test |
![](file.png) | ST | Sequential Timer |
![](file.png) | ST | SimPlification Task |
![](file.png) | ST | SPace Telescope |
![](file.png) | ST | Spacelab Technology |