| Acronym | Meaning |
| HS | Horizon Sensor |
| GOES | GeGOESGeostationary Operational Environment Satellite |
| NAM | National Association Of Manufacturers |
| NTO | NitrogenTetroxide |
| SPMS | Special Purpose Manipulator System |
| PFC | Performance Flight Certification |
| LST | Large SpaceTelescope |
| FDM | Frequency Division Multiplexing |
| SRD | Shuttle Requirements Definition |
| PEM | Plant Engineering And Maintenance |