Acronym |
Definition |
| YR | Year |
| YRO | Year-Round Operations |
| YS | Y-axis of SRB (Solid Rocket Booster) |
| YS | Yield Strength |
| YSC | Yearly Spares Cost |
| YT | Y-axis of external Tank |
| YV | Deputy for Space Launch Systems |
| YVC | Directorate of Configuration and Information Management |
| YVCB | Configuration/Data Management Division, Directorate of Configuration and Information Management |
| YVGF | Financial Management Division, Directorate of Configuration and Information Management |
| YVGR | Requirements and Analysis Division, Directorate of Configuration and Information Management |
| YVV | Directorate of Launch Base Operations |
| YVV-1 | Program Safety Office, Directorate of Launch Base Operations |
| YVVE | Directorate of Launch Base Operations, Engineering Division |
| YVVI | Directorate of Launch Base Operations, Inertial Upper Stage Division |
| YVVL | Directorate of Launch Base Operations, Integrated Logistics Support Division |
| YVVO | Directorate of Launch Base Operations, Operations Division |
| YVVS | Directorate of Launch Base Operations, DOD Mission Support Division |
| YY | Two-digit year date |
| YYYY | Four-digit year date |
| Z | Aircraft Symbol prefix – Planning |
| Z | Impedance |
| Z | Normal Acceleration (Load Factor) |
| Z | Z-axis direction |
| Z | Zone |
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