| Acronym | Meaning |
 | Y | Yotta - Yttrium |
| CAE | Canadian Aviation Electronics (originally) - Certificate In Advanced English |
| ISDN | Integrated Services Digital Network |
| FG | Fog (METAR Code) - French Guiana (FIPS 10-4 Territory Code) |
| SIMPLE | Satellite Interactive Multimedia Platform For Low-cost Earth Stations - Savings Incentive Match Plan For Employees (as Used In SIMPLE IRA) - Standard Interface For Multiple Platform Link Evaluation (NATO STANAG 5602) |
| WVR | Women's Volunteer Reserve (WWII UK) |
| SDP | Social Democratic Party (European Politics) |
| EM | ElectroMagnetism/ElectroMagnetic |
| VLBA | Very Long Baseline Array |
| DLSA | (U.S.) Defense Legal Services Agency |
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