| Acronym | Meaning |
 | OSS | Ossetic Language (ISO 639-2 Code) |
| CGIG | Cross-Government Implementation Group |
| UNDE | Union Of National Defence Employees (Canada) |
| RHO | Southern Rhodesia (ISO 3166 Trigram; Obsolete 1980) |
| FRY | West Frisian Language (ISO 639-2 Code) |
| KUW | Kuwait (UNDP Country Code) |
| RDO | Rapid |
| AMO | Atlantic Multidecadal Oscillation |
| CIS | Canadian Interuniversity Sport - Commonwealth Of Independent States - Command And Information System - Communication And Information System |
| WOS | Wilson Ornithological Society |
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