U
U is a shorthand for 'you' in informal digital communication and is also used as an abbreviation for uninstall, update, or user(s) in technical contexts.
Medical
Miscellaneous
Ursula
United
Underwear
Ugly
Units
Unplasticised
Unhappy
Upbuilding
The Uncompensated
The Usual
Uncommon
Community
Governmental
Uncommitted
Uncompromising
Unit
Unlucky
Unsigned
Unmodified
Upper
Uphill
Uninduced
Unreliable
Unidentified
Unterseeboot
Unclassified
Unredacted
Unlicensed
Unavailable
Underfloor
International
Academic & Science
Uranium
Undergirding
Unexcelled
Unsatisfactory
Undetectable
Undergraduate
Undecided
Upsilon
Uninterpretable
Integrated circuit (circuit diagram marking)
Computing
Subsampled raw YUV file Bitmap graphics
You
Uninstall
Update
Unconditional
Undefined
User
Unicode
Users
Userid
Up
Unlocked
Unwind tape