| Acronym | Meaning |
| TA | Travel Authorization |
| NGM | NNGM Nitrogen Generation Module |
| PPH | Pounds Per Hour |
| STG | Stage |
| PIA | Preinstallation Acceptance |
| D | LSC Defense Logistics Service Center |
| BP | Barber Pole |
| PORD | Performance And 0iperations Requirements Document |
| DCU | Digital Computer Unit |
| ICOU | Inertial Coupling Data Unit |