| Acronym | Meaning |
 | PLM | Polarized Light Microscope/Microscopy |
| JSAF | Joint Semi-Automated Forces (jay-saff) |
| GNB | Guinea-Bissau (ISO 3166 Trigram) |
| F&SF | (The Magazine Of) Fantasy & Science Fiction |
| KATUSA | Korean Augmentation To United States Army |
| TWE | Trans World Entertainment |
| MCDL | Model Composition Definition Language |
| AF | Afghanistan (FIPS 10-4 Country Code; ISO 3166 Digram) -Air Force |
| YK | Yoctokelvin |
| ZM | Zeptometre |
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