| Acronym | Meaning |
| PDSL | Power Demand Signal Left |
| SP | Space And Power |
| PPS | Program Performance Spec Udi-e-21269b/mod |
| STA | Station |
| MSDOS | Micro-soft Disk Operating System |
| MGTR | Measured Gas Temperature Right |
| STEP | Spec To Executable Program; |
| GR | Gear |
| NFOV | Narrow Field Of View |
| YF | Covered Lighter (self-propelled) |