| Acronym | Meaning |
| HH | Hitchhiker |
| GDCLS | General Dynamics Commercial Launch Services |
| FBV | Fuel Bleed Valve |
| TSS | Targeted Search System / Tethered Satellite System |
| LANL | Los Alamos National Laboratory |
| IOBM | In Ocean By Mistake |
| MTFF | Columbus Man-Tended Free-Flyer |
| SSME | Space Shuttle Main Engine |
| PLSS | Portable Life Support System |
| ATCS | Active Thermal Control System |