| Acronym | Meaning |
| SSRT | Single Stage Rocket Technology |
| AOCS | Attitude And Orbit Control System |
| CBR | Cosmic Background Radiation |
| UPPP | Union Pour La Promotion De La Propulsion Photonique |
| A&A | Astronomy And Astrophysics |
| SSBUV | Shuttle Solar Backscatter Ultraviolet Experiment |
| MRO | Memory Read-Out |
| HB | Horizontal Branch |
| PSR | PulSaR |
| FRR | Flight-Readiness Review |