| Acronym | Meaning |
| MSS | Mechanical Support Systems |
| WWMS | Waste Water Management System |
| DCS | Digital Command System (Subsystem) |
| FLN | Fuel Line |
| IDS | Item Description Sheet |
| VDD | Version Description Document |
| REFRIG | Refrigerate |
| UV | Under Voltage (U/V Preferred) |
| IAV | Inventory Adjustment Voucher |
| PIGA | Pendulous Integrating Gyro Accelerometer |