| Acronym | Meaning |
 | SASE | Self-Addressed Stamped Envelope |
| STAG | (U.S.) Strategy And Tactics Group |
| VFW | Veterans Of Foreign Wars |
| GTM | Guatemala (ISO 3166 Trigram) |
| LIGO | Laser Interferometer Gravitational Wave Observatory |
| SEDRIS | Synthetic Environment Data Representation And Interchange Specification |
| SLAN | Sine Loco |
| BYS | Byelorussian Soviet Socialist Republic (ISO 3166 Trigram; Obsolete Since 1992) |
| FHI | Family Health International |
| HEPA | High-Efficiency Particulate Air (filter) |
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