| Acronym | Meaning |
 | M | Milli |
| IFD | In-flight Deployment |
| GPS | Global Positioning System |
| ATD | Atmospheric Technology Division |
| ISP | Internet Service Provider |
| GA | Billion Years Unit |
| IRR | Integrated Requirements Review |
| BOD | Beneficial Occupancy Date |
| AER | Advanced Electric Reactor |
| CCAA | Canadian Clean Air Act |
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