| Acronym | Meaning |
 | FCD | Flight Control Division (JSC) |
 | FDL | Flight Director Loop |
 | RJEC | Reaction Jet Engine Control |
 | VATA | Vibro-Acoustic Test Article |
 | CUDS | Cumulative Data Statistics |
 | SPA | Signal Processor Assembly |
 | MRF | Maintenance Responsibility File |
 | ERTS | Earth Resources Technology Satellite |
 | MAC | Maximum Allowable Concentration |
 | HPRV | Hydrogen Pressure Relief Valve |