| Acronym | Meaning |
| PBD | Payload Bay Door |
| CAU | Customer Acquisition Unit |
| CWS | Caution And Warning System |
| ESDAC | European Space Data Center (Darmstadt |
| MCM | MADS Control Module |
| FRSI | Flexible Reusable Surface Insulation |
| DFVLR | Deutsche Forschungs-und Versuchsanstalt Luft-u |
| MTBF | Mean Time Between Failure |
| EEH | EMU Electrical Harness |
| PCU | Pressure Control Unit |