| Acronym | Meaning |
| RATELO | Radiotelephone Operator |
| UNDP | United Nations Development Programme |
| IWC | International Whaling Commission |
| MOW | Maintenance Of Way (also MW) |
| NWFZ | Nuclear-Weapon-Free Zone |
| SUD | Subject Under Discussion |
| RDD | Radiological Dispersion Device |
| UM | U.S. Minor Outlying Islands (postal Symbol; ISO 3166 Digram) |
| XHR | EXtra High Image Resolution - XMLHTTPRequest |
| MOH | Medal Of Honor - Music On Hold |