| Acronym | Meaning |
| CRTG | Cartridge |
| HPOT | High-pressure Oxidizer Turbopump |
| PCEM | Propulsion Contamination Effects Module |
| FDM | Frequency Division Multiplexing |
| HSS | High Stress Strain |
| L | Lumen |
| EU | Experimental Unit |
| OSE | Orbiter Support Equipment |
| ELV | Electrically Operated Valve |
| OMR | Operations And Maintenance Requirements |