| Acronym | Meaning |
| ITO | Integration And Test Order |
| EADI | Electronic Attitude Director Indicator |
| LCU | Inertial Components Temperature Controller |
| SD | LSoftware Development Laboratory |
| CCMS | Checkout |
| NSP | NASA SupportPlan |
| MAPOLE | Magnetic Dipole Spark Transmitter |
| REI-N4 | REI-N4011ite Cation |
| RETRO | Retrofire Officer |
| MDT | Mean Down Time |