| Acronym | Meaning |
| GPC | Gel Permeation Chromatograph |
| SCDU | Signal Conditioning And Display Unit |
| FMR | Field Modification Request |
| EMR | Engine Mixture Ratio |
| LD | Lateral Direction |
| ECF | Equivalency Capability File |
| MIU | Multiplex Interface Unit |
| DDPC | Digital Data Processing Center (Complex) |
| ESOW | Engineering Statement Of Work |
| OAFD | Orbiter Air Flight Deck |