| Acronym | Meaning |
 | CK | Cocos (Keeling) Islands (FIPS 10-4 Country Code) - Cook Islands (ISO 3166 Digram) |
| EFF | Electronic Frontier Foundation |
| TC | Teracoulomb - Turks And Caicos (ISO 3166 Digram) - United Arab Emirates (FIPS 10-4 Country Code; From Trucial Coast States) |
| NARDIC | U.S. Navy Acquisition Research And Development Information Center |
| CU | Old Church Slavonic Language (ISO 639-1 Code) |
| PR | Praseodymium |
| HE | High Explosive |
| EE | Estonia (ISO 3166 Digram) -Electrical Engineering - Electrical Engineer |
| IAEA | International Atomic Energy Agency |
| VOC | Vereenigde Oostindische Compagnie (Dutch East India Company) - Volatile Organic Compounds |
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