| Acronym | Meaning |
| SSPD | Shuttle System Payload Definition (Study) |
| NDT | Nondestructive Test |
| MDCS | Maintenance Data Collection System |
| DD/HH:MM:SS | Day/Hour:Minute:Second |
| EHOT | External Hydrogen/Oxygen Tank |
| VR | Video Recorder |
| CDSC | Communications Distribution And Switching Center |
| SCIM | Standard Cubic Inches Per Minute |
| OPGUID | OPtimum Guidance (Technique) |
| OOS | Orbit-to-Orbit Shuttle |