| Acronym | Meaning |
| CICU | Communication Interface Control Unit |
| HRDR | High Rate Digital Recorder |
| RIL | Recoverable Item(s) List(s) |
| VFR | Visual Flight Rules |
| MMU | Manned Maneuvering Unit |
| EGRET | Energetic Gamma Ray Explorer Telescope |
| CTI | Critical Transportation Item |
| CICU | Computer Interface Conditioning Unit |
| DIP | Designated Inspection Point |
| OHA | Operational Hazard Analysis |