| Acronym | Meaning |
| MDCA | Main Distribution Control Assembly |
| NDE | Nondestructive Evaluation |
| DOI | Descent Orbit Insertion |
| RC | Rate Command |
| PBK | Payload Bay Kit |
| OCF | Orbiter Computational Facilities |
| PSID | Pounds Per Square Inch Differential |
| GSIU | Ground Standard Interface Unit |
| GCL | Ground Control Landing |
| FTOH | Flight Test Operations Handbook |