| Acronym | Meaning |
| TTCA | Thrust Translation Controller Assembly |
| FUNC | Function |
| EWR | Engineering Work Request |
| OCO | Open-Close-Open |
| EIU | Engine Interface Unit |
| PETN | Petaerythrite Tetranitrate |
| SRS | Support Requirements System |
| CIS | Communications Interface System |
| RIDI | Receiving Inspection Detail Instruction |
| MFMR | Multifrequency Microwave Radiometer |