| Acronym | Meaning |
 | ISPM | International Solar Polar Mission |
| FQ | Flight Qualification |
| SR | Status Register |
| FCT | Fuel Cell Test |
| GOPG | GrGOPGGround Operations Planning Group |
| MV | Manual Valve |
| ACRV | Assured Crew Return Vehicle |
| OGS | Outer Glideslope |
| ECP | Engineering Change Program |
| PFRT | Preliminary Flight Rating Test |
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