| Acronym | Meaning |
 | SDR | Space Division Regulation |
| WBR | Work Bench Rack |
| DDI | Discrete Data Input |
| LM | Left Mid |
| FDM | Frequency Division Multiplexer |
| OSSA | Office Of Space Science And Applications |
| IAS | Integrated Avionics System |
| SAMTO | Space And Missi E Test Organization (VAFE3) |
| PTO | Participating Test Organizations |
| HDC | HYbrid Device Controller |
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