| Acronym | Meaning |
| RTN | Return |
| HCP | Hardness Critical Process |
| MFD | Multifunction Display |
| ECI | Electronic Conversion Interface |
| SPF | Single Point Failure |
| FFRDC | Federally Funded Research & Development Center |
| SSS | System/segment Specification |
| ALOAF | Asset Library Open Architecture Framework |
| AIB | Action Item Browser |
| ARD | Arinc And Discrete Circuit Card |