| Acronym | Meaning |
| PAD | ProgramApprovalDocument |
| VLF | Very Low Frequency |
| FCIM | Flight Control Interface Module |
| MDA | Main Distribution Assembly |
| OBS | Operational Bioinstrumentation System |
| KCAL | Kilocalorie |
| BM | Business (Branch) Manager |
| FMR | Field Modification Request |
| TRS | Top Right Side |
| DDS | Detailed Design Specification |