| Acronym | Meaning |
 | DDIS | Data Depository Index System |
| IH/SR | Integration Hardware And Software Review |
| U/M | Unscheduled Maintenance |
| TL | Time Latest |
| SHE | SuPercritical Helium |
| VSA | Verification Site Approval |
| ATE | Automated Test Equipment |
| NGM | NNGM Nitrogen Generation Module |
| EMEC | Electromagnetic Effects Compatibility |
| POP | Preflight Operations Procedures |
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