| Acronym | Meaning |
| UST | United States Testing (Company) |
| SPS | Samples Per Second |
| NAS | National Academy Of Sciences |
| IAL | International Algebraic Language |
| CH | Channel |
| MY | MMY Man Year |
| HEX | Heat Exchanger |
| PG | Power Generation |
| PIF | Payload Integration Facility |
| FCR | Final Configuration Review |