| Acronym | Meaning |
 | TBC | Terminal Buffer Controller |
| MMS | Multimission Modular Spacecraft |
| UPTLM | UPlink Telemetry |
| GPS | Ground Power Supply |
| HDST | Headset |
| GETIL | Ground Elapsed Time Of Landing (for TIG Of |
| OOS | On-Orbit Station |
| MRL | Manipulator Retention Lock |
| URA | Urine Receptacle Assembly |
| CIS | Communication Interface System |
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