| Acronym | Meaning |
| DDS | Documentation Distribution System |
| RSO | Range Safety Officer |
| PDU | Power Drive Unit |
| MMU | Mass Memory Unit |
| I | DAC Integrated Digital-Analog Converter |
| RDP | Receiver And Data Processor |
| SP-OPI | Shuttle) |
| FTS | Functional Test Specifications |
| CHCS | Cabin Humidity Control Subsystem |
| BRKT | Bracket |