| Acronym | Meaning |
 | SB | Synchronization Bit |
| RSU | Remote ServiceUnit |
| ISC | Johnson Space Center (formerly MSC) |
| HD | Hoiddown |
| SUMS | Shuttle Upper-Atmosphere Mass Spectrometer |
| DDR | Design Development Record |
| LC | Intercom (Orbiter To Ground Via Hardline) |
| GML | GeGMLGeneral Measurement Loop |
| MATL | Material |
| RMC | Redundancy Management Control |
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