| Acronym | Meaning |
| EPD | Electrical Power Distribution |
| OT | Operational Test |
| ES | Escape System |
| DP | Data Processing |
| E/C | Encoder/Coupler |
| DDP | Digital Data Processing (Processor) |
| HGVT | Horizontal Ground Vibration Test |
| MLP | Mobile Launch (Launcher) Platform |
| DAP | Digital Autopilot |
| EOP | Experiments Of Opportunity |