| Acronym | Meaning |
| FF | Flight Forward |
| EGUN | Fast Pulse Electron Gun |
| SSPD | Shuttle System Payload Definition (Study) |
| HEM | Hitchhike Experiment Module |
| CPCR | Computer Program Change Request |
| R/W | Read/Write |
| GSSI | Ground Support System Integration |
| FC | Flight Computer |
| TSP | Twisted Shielded Pairs (Cables) |
| EOMF | End Of Minor Frame |