| Acronym | Meaning |
 | GU | Guam (postal Symbol; ISO 3166 Digram) |
| MISSI | Multilevel Information System Security Initiative |
| GNOME | GNU Network Object Model Environment |
| DSS | Digitized Sky Survey - Discarding-Sabot Shell (ammunition) |
| BSF | British Standard Fine (screw Thread) |
| ORD | Office Of Research And Development - Operational Requirements Document |
| NSG | National System For Geospatial-Intelligence |
| FAB | Feline Advisory Bureau (UK Feline Charity) |
| IIT | Illinois Institute Of Technology - Indian Institutes Of Technology - Indiana Institute Of Technology |
| UHF | Ultra High Frequency |
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