| University Auxiliary Services | Academic & Science |
| University Accounting Service | Academic & Science |
| Uzbekistan Academy of Sciences | Academic & Science |
| Academy of Sciences of Uzbekistan | Academic & Science |
| Akademiâ Nauk Respubliki Uzbekistan | Academic & Science |
| O'zbekiston Respublikasi Fanlar Akademiyasi | Academic & Science |
| Ukrainian Academy of Sciences | Academic & Science |
| University of Alaska Southeast | Academic & Science |
| University of Arizona South | Academic & Science |
| Samburu | Airport Code |
| University Accounting Services, Llc. | Business |
| United Armored Services | Business |
| United Auto Service | Business |
| Union Argentina De Sordomudos | Community |
| United Armenian Students | Community |
| Unavailable Seconds (Rec. G.997.1) | Computer and Networking |
| Uniform Access Solution | Computing |
| User Agent Server | Computing |
| Universal Application Server | Computing |
| Universal Automation Systems | Computing |
| Universal Authentication Server | Computing |
| Universal Access Server | Computing |
| Ubuntu Advantage Storage | Computing |
| Unifi Application Server | Computing |
| User Agent Switcher | Computing |
| Upper Memory Address Strobe | Computing |
| User Accounts Security | Computing |
| Unmanned Aerial System | General |
| Universidad Autónoma de Sinaloa | General |
| Upstream Activating Sequences | General |
| Upstream Activating System | General |
| United Air Specialists | General |
| Universal Atlantic Systems | General |
| Unmanned Aerial Systems | General |
| Upstream Activating Sequence | General |
| Umanned Aircraft Systems | General |
| Under Armour Sportswear | General |
| Understanding of Alcoholism Scale | General |
| Unmanned aerial | General |
| United Autosports | General |
| Unmanned Aircraft Systems | General |
| Universal Anchorage System | Governmental |
| Upstream Activation Site | Governmental |
| University of Agricultural Sciences | Karnataka State University |
| Urticaria Activity Score | Medical |
| Upstream Activator Sequence | Medical |
| Unmanned Aircraft System | Military and Defence |
| Unicenter Autosys Starter | Softwares |
| Universal Accounting Software | Softwares |
| Un-available Seconds | Telecommunication |
