| Acronym | Meaning |
![](file.png) | THC | Translational Hand Controller |
![](file.png) | EMR | Engine Mixture Ratio |
![](file.png) | HSD | High Speed Data |
![](file.png) | PSIG | Propulsion Systems Integration Group |
![](file.png) | TTC | Tunnel Thermal Control |
![](file.png) | FPBOV | Fuel Preburner And Oxidizer Valve |
![](file.png) | USB | Unified S-Band |
![](file.png) | CLSO | Contingency Landing Support Officer |
![](file.png) | IMDB | Integrated Maintenance Data Base |
![](file.png) | SOM | Spares OPtimization Model |