| Acronym | Meaning |
 | TAP | Total Air Pressure |
| EA | Each |
| TOS | Test Operating System |
| SSPD | Shuttle System Payload Definition (Study) |
| EVSC | Extravehicular Suit Communications |
| DIR | Document Information Record |
| TO | Technical Order |
| DMS | Docking Mechanism System (Subsystem) |
| PBW | Proportional Band Width |
| MACDS | Monitor And Control Display System |
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