| Acronym | Meaning |
| EWSD | Elektronisches W?hlsystem Digital (German |
| SHSN | Snow Showers (METAR Code) |
| FSF | Free Software Foundation |
| HO | Holmium |
| MBTI | Myers-Briggs Type Indicator |
| 4D | Four-dimensional (usually Three Spatial Plus One Temporal Dimension |
| NBT | Nitroblue Tetrazolium (assay) |
| HG | Mercury (Latin Hydrargyrum) |
| OCFS2 | Oracle Cluster File System Release 2 |
| CWC | Chemical Weapons Convention |