| Acronym | Meaning |
| FCO | Final Checkout |
| DIGI | Digital |
| SAM | SAMPShuttle Automated Mass Properties |
| VGOR | Vehicle Ground Operation Requirements |
| FITH | Fire-in-the-Hole |
| SBE | Sub-Bit Encoder |
| CDW | Command Data Word |
| ECA | Electronics Control Assembly |
| STS | RSystem Test Summary Report |
| TSLD | Troubleshooting Logic Diagram |