U.S.C.
United States Code
UAV
Unmanned Aerial Vehicle
UCNI
Unclassified Controlled Nuclear Information (USA)
UK-C
United Kingdom-CONFIDENTIAL
UK-R
United Kingdom-RESTRICTED
UKUSA
UK-USA Vereinbarung
UOP
Urzad Ochrony Panstwa. Polnischer Auslandsnachrichtendienst.
USCIB
United States Communications Intelligence Board, 1946-58
USIB
United States Intelligence Board
USML
United States Munitions List (USA)
USSAN
U.S. Security Authority for NATO (USA)
USSID
United States Signals Intelligence Directive
USSS
United States Sigint System
UV
Untervertretung