| Acronym | Meaning |
 | SFC OR SFC | Surface |
| OT | Optical Techniques Group |
| API | Absolute Position Indication |
| AT | Accelerator Technology |
| GLRS | Geodynamics (or Geoscience) Laser Ranging System |
| SAS | Small Astronomy Satellite |
| AST | Algorithm Support Team |
| SIR | Shuttle Imaging Radar |
| C&DH | Command And Data Handling |
| ADDS | Aviation Digital Data Service |
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