| Acronym | Meaning |
| GSCU | Ground Service Cooling Unit |
| MTO | Maximum Time Out |
| NRT | Near Real-Time |
| LM | Information Memory |
| MTEO | Optical Maintenance Test Equipment |
| LH2 | Liquid Hydrogen |
| VSD | Vertical Situation Display |
| F | Front |
| HLAL | High Level Assembler Language |
| VCM | Volatile Condensable Material |