| Acronym | Meaning |
| ATA | Advanced Technology Attachment (IBM Personal Computer) - Afghan Transitional Authority - Allen Telescope Array -Antarctica (ISO 3166 Trigram) |
| HGF | Human Growth Factor |
| USNA | United States National Arboretum - United States Naval Academy |
| OPCON | Operational Control |
| AG | Attogram |
| NAGPRA | Native American Graves Protection And Repatriation Act |
| RU | Russia (ISO 3166 Digram) |
| LUG | Luganda Language (ISO 639-2 Code) |
| GTM | Guatemala (ISO 3166 Trigram) |
| OOAD | Object Oriented Analysis And Design |