| Acronym | Meaning |
 | MCL | Mass Change Log |
| MPS | Materials Processing In Space |
| SWAA | SPacelab Window Adapte |
| TPI | Terminal Phase Initiation |
| STA | Shuttle Training Aircraft |
| PSI | Pounds Per Square Inch (Static Pressure) |
| QSS | Quindar Scanning System |
| STLOS | Star Line Of Sight |
| MRL | Material Requirements List |
| SCIU | Spacecraft Interface Unit |
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