| Acronym | Meaning |
 | YS | Yoctosecond |
| AWD | Many |
| FORTRAN | The IBM Mathematical FORmula TRANslating System (programming Language) |
| NA | Namibia (ISO 3166 Digram) -National Archives - Negative Acknowledge |
| AFRRI | (U.S.) Armed Forces Radiobiology Research Institute |
| HIPPARCOS | HIgh Precision Parallax COllecting Satellite |
| NNSA | U.S. National Nuclear Security Administration |
| EASA | European Aviation Safety Agency |
| AST | Atlantic Standard Time (UTC-4 Hours) |
| HAT | Highest Astronomical Tide (nautical Charts) -Hungarian Automated Telescope |
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