| Acronym | Meaning |
| BCE | Backup Control Electronics |
| CRDP | Computer Resources Development Plan |
| OCD | Operational Capability Development |
| TCS | Test Control System |
| HI | High |
| PR | PulseRate |
| GSI | Glide Slope Indicator |
| ATMOS | Atmospheric Trace Molecule Spectroscopy |
| SEB | Source Evaluation Board |
| LVLH | Local Vertical/local Horizontal |