| Acronym | Meaning |
| ED | Edge Distance |
| IOQE | Input/Output C)ueue Element |
| MCS | Maintenance And Checkout Station |
| SE/FAC | Support Eq Uipm Ent/Facility |
| RGAL | Rate Gyro Assembly-Left SRB |
| RAAB | Remote Application And Advisory Box |
| SSM | Subsystem Manager |
| FCE | Flight Crew Equipment |
| GNCS | GuGNCSGuidance And Navi-oation Control System |
| PHA | Preliminary Hazard Analyses |