| Acronym | Meaning |
| E | East |
| MS | Machine Steel |
| PCI | Product Configuration Identification |
| ODDS | Operational Data Delivery Services |
| HDP | Holddown Post |
| MAC | Maintenance Advisory Committee |
| END | EFF End Effector |
| H/L | Hardline |
| HEAO | High Energy Astronomy Observatory |
| CDDT | Countdown Demonstration Test |