| Acronym | Meaning |
 | ATB | Active Time Battle -British Antarctic Territory (ISO 3166 Trigram; Merged With AQ In 1979) |
| FL | Femtolitre |
| IANA | Internet Assigned Numbers Authority |
| PIB | PolyIsoButylene |
| FOIA | Freedom Of Information Act |
| ILS | Israeli Shekel (ISO 4217 Currency Code) |
| INDIGO | (U.S.) INtelligence DIvision Gaming Operation |
| WM | Wehrmacht Marine (German WW2 Navy Vehicle Licence Plate Code) |
| ADTB | Army Doctrine And Training Bulletin |
| MA | Megaannum |
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