| Acronym | Meaning |
 | POR | Portuguese Language (ISO 639-2 Code) |
| GDR | General Distribution Release (Microsoft Term For A Software Service Release; Between Hotfix And Service Pack) |
| AET. | Aetatis (Latin |
| AAAI | American Association For Artificial Intelligence |
| ZS | Zeptosecond |
| MH | Millihenry |
| PDD | Past Due Date - Presidential Decision Directive |
| UDT | Underwater Demolition Team |
| OS | Osmium |
| AOA | Argonne National Laboratory -Angolan Kwanza (ISO 4217 Currency Code) -Award Of Arms (heraldry) |
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