| Acronym | Meaning |
 | MA | Multiple Access |
| HF | Hydrogen Fill |
| VEH | ID Vehicle Identification |
| FXD | Fixed |
| CID | Computer Interface Device |
| URA | Urine Receptacle Assembly |
| MTEC | Maintenance Test Equipment Catalog |
| ECP | Engineering Change Proposal |
| SPL | System Programming Language |
| FSO | Functional Supplementary Objective |
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