USS
USS most often stands for the United States Senate, the upper chamber of the U.S. Congress, though it is also seen in medical imaging (ultrasound scan), industry (United States Steel), sports (U.S. Swimming), and computing (Unix System Services).
Medical
ultrasound scan
Universal Spine System
Upshaw-Schulman syndrome
Uptake Signal Sequence
Ureterosigmoidostomy
Miscellaneous
The United States Of Saturn
United Star Ship
Uncorrected Sum Of Squares
User Submissions System
United Space Ship
United States Starship
Universal Star Ship
United Ship Of Stacey
United Solar Systems
United States Spaceship
Uniformly Spaced Subcarriers
United States Standard
Unites States Ship
Community
Governmental
United States Senate
Under Seat Steering
Ultimate Short Shifter
United States Ships
Utility Support Structure