| Acronym | Meaning |
| HLC | Heavy Lift Capability |
| ISAS | Institute Of Space AND Astronautical Science |
| SIXA | Silicon X-ray Array |
| RPM | Retro Propulsion Module |
| FOLD | Federally-Owned LANDSAT Data |
| PMC | Permanently Manned Capability |
| RCS | Reaction Control System / Revision Control System |
| NIMS | Near Infrared Mapping Spectrometer |
| UTC | Coordinated Universal Time |
| BMDO | Ballistic Missile Defense Office |