| Acronym | Meaning |
 | USBS | Unified S-Band System (Subsystem) |
| H | AlH AlAltitude Rate |
| NHA | NNHA Next Higher Assembly |
| BU | Backup |
| PAM-D | PAM |
| PRSD | Power Reactant Storage And Distribution |
| ORT | Operational Readiness Test |
| SRR | Site Readiness Review |
| SCDR | Shuttle Critical Design Review |
| TBF | Test De Bon Fonctionnement (Spacelab) |
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