| Acronym | Meaning |
| DAP | Digital Autopilot |
| ORCHIS | Oak Ridge Computerized Hierarchical Information |
| MPD | Main Dc Power Distributor Assembly |
| FAC | Facility |
| SF | Signaling Frequency |
| ORIDE | Override |
| FSS | Field Spectrometer System |
| OAST | Office Of Aeronautics And Space Technology |
| PRD | ProcurementRequirementsDocument |
| EPT | Emergency Procedure Trainer |