| Acronym | Meaning |
| FFBD | Functional Flow Block Diagram |
| CERT | Certification |
| CMC | Crew Module Computer |
| ESRO | European Space Research Organization |
| MHA | Multiple Headset Adapter |
| ECEP | Experiment Checkout Equipment Processor |
| IFOT | In-Flight Operations And Training |
| O/V-U/V | Over Voltage/Under Voltage |
| STBY | Standby |
| SL-SSS | Spacelab Subsystem(s) Segment |