UAS
- Abdul Somad
- Session Initiation Protocol
- UAR (disambiguation)
- USB Attached SCSI
- Undergraduate Ambassadors Scheme
- United Arab States
- Unity (game engine)
- Universal Animation Studios
- Universidad Autónoma de Sinaloa
- University Air Squadron
- University of Agricultural Sciences (disambiguation)
- University of Agricultural Sciences, Dharwad
- University of Alabama System
- University of Alaska Southeast
- University of Applied Sciences
- Unmanned aircraft system
- Upstream activating sequence
- Uruguayan American School
- User agent