A | B | C | D | E | F | G | H | I | J K L | M | N | O | P | Q |
R | S | T | U | V | W | X Y Z #
UART universal asynchronous receiver transmitter
UAV unmanned aerial vehicles
UBM under bump metallization
UC-PBG uniplanar compact photonic bandgap
UDM user-defined models
UFMOP unintentional frequency modulation on pulse
UIM uniform impedance resonator
UM unintentional modulation
UMTS Universal Mobile Telecommunications System (Europe)
U-NII Unlicensed National Information Infrastructure
UPH units per hour
UPS uninterruptible power supply
UPT universal personal telecommunications
URE user range error
USAT ultra-small aperture terminals
USB Universal Serial Bus
USB upper sideband
USML Untied States Munitions List
UTC Universal Time, Coordinated
UWB ultrawideband