| Acronym | Meaning |
 | BUOU | Backup Optical Unit |
| TRKR | Tracker |
| PBIC | Programmable Buffer Interface Card |
| IPS | IRD Information Requirements Document |
| IFA | In-FlightAnalyses |
| FSS | Fixed Service Structure |
| MPTA | Main Propulsion Test Article |
| HMP | Hydrozene Monopropeflant (RCS Propellant) |
| ITO | Integration And Test Order |
| CIS | Communications Interface System |
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