| UAR | Ultimate Aspect Ratio 
| Others |
| UAR | Ultimate Augmented Reality
| Others |
| UAR | Unclaimed Asset Register
| Others |
| UAR | Unclaimed Assets Register
| Others |
| UAR | Unconventional Assisted Recovery
| Others |
| UAR | Undergraduate Advising and Research
| Others |
| UAR | Underground Access Remote
| Others |
| UAR | Understanding Animal Research
| Others |
| UAR | Unforecasted Ammunition request
| Others |
| UAR | Unidades Antiterroristas Rurales
| Others |
| UAR | Uniformly At Random
| Others |
| UAR | Unio Atletica Rubi
| Others |
| UAR | Union Africaine de Radiodiffusion
| Others |
| UAR | Union Annual Report
| Others |
| UAR | Union of African Railways
| Others |
| UAR | Unique Application Reseller
| Others |
| UAR | United Arab Republic
| Others |
| UAR | United Auto Recovery
| Others |
| UAR | Universal Army Rifle
| Others |
| UAR | Universal Assault Rifle
| Others |
| UAR | Universidad Alfonso Reyes
| Others |
| UAR | University Accounts Receivable
| Others |
| UAR | University Administrative Regulations
| Others |
| UAR | University Admission Rank
| Others |
| UAR | Unweighted Average Recall
| Others |
| UAR | Up and Running
| Others |
| UAR | Upper Atmosphere Research
| Others |
| UAR | Upper Austrian Research
| Others |
| UAR | Urban Affairs Review
| Others |
| UAR | Urban Augmented Reality
| Others |
| UAR | Usage And Retention
| Others |
| UAR | User Access Region
| Others |
| UAR | User Access Review
| Others |
| UAR | User Access Rights
| Others |
| UAR | User Authorization Request
| Others |
| UAR | Utah Association of REALTORS
| Others |