| Acronym | Meaning |
| SRS | Specification Revision Sheet |
| PTO | Participating Test Organizations |
| MCA | MotorControlAssembly |
| RSYS | ResponsibleSystem |
| E/C | Encoder/Coupler |
| MAEP | Minimum Autoland Entry Point |
| PCM | E Pulse-Code Modulation Event |
| KSA | Ku-band Single Access |
| CIU | Communication Interface Unit |
| LWR | Lower |