| Acronym | Meaning |
| ESO | European Southern Observatory |
| DEA | Drug Enforcement Agency |
| NIC | Network Interface Card -Nicaragua (ISO 3166 Trigram) |
| ACDA | Arms Control & Disarmament Agency |
| HP | IL -Hewlett-Packard Interface Loop (serial Bus Used With Some HP Calculators And Computers |
| LRU | Line-Replaceable Unit |
| KA | Kamov Design Bureau |
| TUV | Tuvalu (ISO 3166 Trigram) |
| EE | Estonia (ISO 3166 Digram) -Electrical Engineering - Electrical Engineer |
| DSTL | British Defence Science And Technology Laboratory |