| Acronym | Meaning |
| ISL | Iceland (ISO 3166 Trigram) |
| GIGO | Garbage In Garbage Out (computing) |
| PI | P?li Language (ISO 639-1 Code) |
| DK | Denmark (ISO 3166 Digram) |
| LTC | Long Term Costing |
| UMI | U.S. Minor Outlying Islands (ISO 3166 Trigram) |
| NVG | Night Vision Goggles |
| UA | Ukraine (ISO 3166 Digram)Unit Of Action |
| DAWN | (U.S.) Drug Abuse Warning Network |
| DL | Dexter's Laboratory |