| Acronym | Meaning |
| HLV | Heavy Lift Vehicle |
| ASEM | Assembly Of Station By EVA Methods |
| ERS | Earth Resources Satellite |
| STSCI | Space Telescope Science Institute |
| ICE | International Cometary Explorer |
| ACRV | Astronaut Crew Rescue Vehicle |
| PMC | Permanently Manned Capability |
| FPD | Flight Projects Directorate |
| TOS | Transfer Orbit Stage |
| NESDIS | National Environmental Satellite Data And Information Service. |