| Acronym | Meaning |
 | ROS | Removable Overhead Structure |
| ETS | External Tank System (Subsystem) |
| DYN | Dynamic |
| HDR | High Data Rate |
| SEA | Silicon Elastimeter Ablator |
| USBI | United Space Booster |
| SSM | BSpace Shuttle Maintenance Baseline |
| RSP | Rendezvous Station Panel |
| MMC | Martin Marietta Corporation |
| MET | Meteorological |
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