| Acronym | Meaning |
| RJ/EC | Reaction Jet/Engine Control |
| LPS | Launch Processing (Processor) System |
| TNL | Tunnel |
| CCU | Communications Carrier Umbilical |
| LD | Lateral Direction |
| TPF | Terminal Phase Finalization (Braking) |
| IFRU | In-Flight Replacement Unit |
| TMB | Transportation Management Bulletin |
| LMS | Inventory Management System |
| D/A | Digital To Analog |