| Acronym | Meaning |
| GBR | United Kingdom Of Great Britain And Northern Ireland (ISO 3166 Trigram) |
| YK | Yoctokelvin |
| JFTX | Joint Field Training Exercise |
| CEI | Competitive Enterprise Institute |
| INCITS | InterNational Committee For Information Technology Standards |
| WRT | World Rally Team |
| PCIE | Peripheral Component Interconnect Express (computer Bus) |
| COIN | Counter-Insurgency (military) |
| UR | Soviet Union (NATO Country Code |
| PUS | United States Miscellaneous Pacific Islands (ISO 3166 Trigram; Obsolete 1986) |