| Acronym | Meaning |
| DL | Downlink |
| LAIU | Launch Abort Interface Unit |
| EVCU | Extravehicular Communications Umbilical |
| IAD | Interface Agreement Document |
| DP&SS | Data Processing And Software Subsystem |
| USB | Upper Side Band |
| MU | Multiple Unit |
| PSDP | Payload Station Distribution Panel |
| VT | Vent |
| ECR | Engineering Change Request |