| uniquement | only |
| Uniquement grâce au travail | By sheer hard work |
| unir | connect |
| Unirally | Uniracers |
| Uniramia | Uniramia |
| unisexe | unisex |
| unissez-vous! | unite |
| unisson | unison |
| Unisurf | CAx |
| Unisys Corporation | Unisys |
| unitaire | unitarian |
| Unitairien | Unitarian |
| unitarien | unitarian |
| unitarienne | unitarian |
| unitarisme | Unitarianism |
| unitarisme-universalisme | Unitarian Universalism |
| Unitatis Redintegratio | Unitatis Redintegratio |
| Unite astronomique | Astronomical unit |
| United Airlines | United Airlines |
| United Auto Workers | United Auto Workers |
| United Center | United Center |
| United for Intercultural Action | UNITED for Intercultural Action |
| United Fruit Company | United Fruit Company |
| United Hockey League | International Hockey League |
| United Liberation Front of Asom | United Liberation Front of Asom |
| United Overseas Bank Plaza One | UOB Plaza |
| United Paramount Network | UPN |
| United Parcel Service | United Parcel Service |
| United States | SS United States |
| United States Africa Command | United States Africa Command |
| United States Air Force | United States Air Force |
| United States Air Forces in Europe | United States Air Forces in Europe |
| United States Army | United States Army |
| United States Army Air Corps | United States Army Air Corps |
| United States Army Air Forces | United States Army Air Forces |
| United States Army Rangers | United States Army Rangers |
| United States Central Command | United States Central Command |
| United States Department of Transportation | United States Department of Transportation |
| United States European Command | United States European Command |
| United States Geological Survey | United States Geological Survey |
| United States Holocaust Memorial Museum | United States Holocaust Memorial Museum |
| United States Joint Forces Command | United States Joint Forces Command |
| United States Marine Corps | United States Marine Corps |
| United States Marshals Service | United States Marshals Service |
| United States National Library of Medicine | United States National Library of Medicine |
| United States Navy | United States Navy |
| United States Northern Command | United States Northern Command |
| United States Pacific Command | United States Pacific Command |
| United States Patent and Trademark Office | United States Patent and Trademark Office |
| United States Postal Service | United States Postal Service |
| United States Secret Service | United States Secret Service |
| United States Southern Command | United States Southern Command |
| United States Special Operations Command | United States Special Operations Command |
| United States Strategic Command | United States Strategic Command |
| United States Transportation Command | United States Transportation Command |
| United Technologies Corporation | United Technologies Corporation |
| United World Chart | United World Chart |
| Unity | Unity Module |
| unité | unit |
| Unité allemande | Unification of Germany |
| unité astronomique | astronomical unit |
| unité centrale | central processing unit |
| unité centrale de traitement | CPU |
| Unité de base du système international | SI base unit |
| unité de calcul en virgule flottante | floating-point unit |
| Unité de combat en environnement hostile | Hazardous Environment Combat Unit |
| Unité de disques | Direct access storage |
| Unité de masse atomique | Atomic mass unit |
| Unité de mesure anglo-saxonne | Imperial unit |
| Unité de mesure de japonaise | Japanese units of measurement |
| Unité de mémoire à accès dire | Direct access storage |
| Unité de mémoire à accès séle | Direct access storage |
| Unité de répétition | Repeat unit |
| Unité de stockage à accès dir | Direct access storage |
