| Acronym | Meaning |
| OFS | OrbiterFunctionalSimulator |
| UP | Upper |
| MODARI- | Methods Of Defeating Advanced Radar Threats |
| TAD | Temperature And Dewpoint |
| DISTR | DIUDynamic Integrated Test |
| CWEA | Caution And Warning Electronic Assembly |
| H | EPAHigh Efficiency Particle Air (Filter) |
| FMDM | Flex Multiplexer/Demultiplexer |
| SCFM | Standard Cubic Feet Per Minute |
| U/C | Under Current |