| Acronym | Meaning |
 | DISTR | DIUDynamic Integrated Test |
| ISS | Inertial Subsystem |
| POI | Propellant Quantity Indicator |
| N&G | Navigation And Guidance (G&N Preferred) |
| MTBM | Mean Time Between Maintenance |
| MGA | Middle Gimbal Angle |
| ISI | Initial Systems Installation |
| PRN | Program Release Notice |
| RVR | Runway Visible (or Visual) Range |
| NO | Normally Open |
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