| Acronym | Meaning |
| ABU | Analog Backup |
| NDI | Non Developmental Item |
| DIM | Discrete Interface Module |
| EE (E2) | Exponential Elevation |
| NUD | Non-update |
| CAM | Computer Aided Manufacturing |
| CDWG | Controls And Displays Working Group |
| URT | Universal Remote Terminal |
| CPI | Contractor Preliminary Inspection |
| PCO | Procurement Contracting Officer |