| Acronym | Definition |
|---|
| UAS | Ujian Akhir Semester (Indonesian: Semester Final Exams) |
| UAS | Unmanned Aircraft System (US DoD) |
| UAS | Universidad Autónoma de Sinaloa (Sinaloa, México) |
| UAS | University of Alaska Southeast |
| UAS | Unmanned Aerial System |
| UAS | University of Applied Sciences |
| UAS | Unaccompanied Asylum Seeker (UK) |
| UAS | User Agent Server |
| UAS | Universal Automation Systems |
| UAS | Universal Application Server |
| UAS | Unavailable Seconds |
| UAS | Uniform Access Solution |
| UAS | Unassigned (Telabs) |
| UAS | Ukulele Acquisition Syndrome |
| UAS | Unavailable Seconds (Sprint) |
| UAS | Undergraduate Ambassadors Scheme (UK) |
| UAS | University Air Squadron (part of the British RAF) |
| UAS | User Agent String |
| UAS | User Authentication Service |
| UAS | University of Agricultural Sciences, Bangalore |
| UAS | User Adaptive System |
| UAS | Unmanned Aerial Surveillance |
| UAS | University Administrative Services (various locations) |
| UAS | User Application Software |
| UAS | Ukrainian Academy of Sciences |
| UAS | Upstream Activation Sequence |
| UAS | User Account System |
| UAS | Upflow Anaerobic Sludge |
| UAS | Urban Airshed |
| UAS | Uniformed Army Scientists |
| UAS | User Adoption Services (Oracle) |
| UAS | Uniform Asymptotic Solution |
| UAS | Urea-Ammonium Sulfate |
| UAS | Urgent Action Survey |
| UAS | Unloading Auger System |
| UAS | Upper Atmosphere Sensor |
| UAS | United Agro Society (Sri Lanka) |