Universal Documentation System 
Uniform Data System 
Universal Data Systems 
Ugly Domestic Scene 
universal data system 
Universal Drone System 
Unscheduled DNA synthesis 
urine drug screen 
Urodynamic study 
User and Data Services 
Utility Distribution System 
UAV Delivered Sensor 
ultimate damage state 
ULTRAMAR DIAMOND SHAMROCK CORP. 
Ultrasonic Distance Sensor 
ultrasound Doppler sonography 
Ulysses Data System 
uncomplicated diverticulitis of the si… 
Unfalldatenspeicher 
Uniform Data Systems 
Uniform Droplet Spray 
Uniform-Droplet Spray 
Uniscope Display System 
Unit Data System 
Unit for Disaster Studies 
Universal Distributed System 
Universal Document System 
University Dining Services 
Unix Domain Socket 
Unix Domain Sockets