| Acronym | Meaning |
 | TVTA | Thermal Vacuum Test Article |
| VDD | Version Description Document |
| SP-PCO | Program Control Office (KSC Shuttle) |
| SCU | Service And Cooling Umbilical |
| RSD | Requirements And Specifications Document |
| ETA | Explosive Transfer Assembly |
| TR2 | Payload Furnished Mars Tape Recorder (2 Of 2) |
| CIR | Circle |
| MPG | Multiple Point Ground |
| SID | System Interface Document |
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