| Acronym | Meaning |
| LESS | Leading Edge Structure Subsystem |
| MT | Mount |
| FCO | Functional Checkout |
| EPWG | Environmental Projects Working Group |
| ROS | Removable Overhead Structure |
| CB/AC | Circuit Breaker (ac Only) |
| O&P | Operations And Procedures |
| SDG | Supplier Documentation Group |
| TDD | Task Description Document |
| PMR | Program Manager's Review |