| Acronym | Meaning |
 | FDLN | Feedline |
| LBNPD | Lower Body Negative Pressure Device |
| MTGW | Maximum Total Gross Weight |
| M-KG | Meter-Kilogram |
| FVMS | Fluid Volume Measurement System |
| PUV | Propellant Utilization Valve |
| MTEEC | Electronic Maintenance Test Equipment |
| OCS | Onboard Checkout System |
| MECF | Main Engine Computational Facilities |
| MSS | Multispectral Scanner System |
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