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U unit
(EN)
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U Spannung
(DE)
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U_Port universal port
(EN)
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U-frame unnumbered frame
(EN)
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U-TDOA uplink time difference of arrival (UMTS) (EN)
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U/C up converter (EN)
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U/f Spannungs-Frequenz-Wandler
(DE)
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U/FTP unshielded foiled twisted pair (EN)
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U/M user/message (Slot) (EN)
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U/STP unscreened shielded twisted pair (EN)
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U/UTP unshielded unshielded twisted pair
(EN)
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U2F universal second factor (2FA)
(EN)
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UA unnumbered acknowledgement (HDLC)
(EN)
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UA user agent
(EN)
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UAA universally administrated address
(EN)
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UAA unified audio architecture (Microsoft) (EN)
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UAC universal access control (EN)
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UAC user agent client (H.323)
(EN)
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UAC user access control (EN)
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UAC unbalanced asynchronous class (HDLC) (EN)
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UAD user account database (EN)
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UADSL universal ADSL (EN)
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UAE user agent entity (X.400)
(EN)
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UAE unexpected application error (EN)
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UAF user authorization file (EN)
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UAF universal authentication framework (FIDO)
(EN)
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UAI Unternehmensanwendungsintegration
(DE)
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UAL user access line (X.25)
(EN)
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UAL user agent layer (X.400)
(EN)
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UAM user authentication module (EN)
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UAM universal access method (WLAN)
(EN)
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UAN universe area network (EN)
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UAN universal access number (CS, IN) (EN)
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UAP user account protection (Windows) (EN)
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UAP upper address part (Bluetooth) (EN)
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UAPDU user agent protocol data unit (MHS) (EN)
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UART universal asynchronous receiver/transmitter
(EN)
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UAS unmanned aircraft system (drone) (EN)
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UAS unavailable second (EN)
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UAS ultrasonic alarm system (automotive) (EN)
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UAS user agent server (H.323)
(EN)
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UAT user acceptance test (EN)
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UAV unmanned aerial vehicle (drone)
(EN)
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UAWG universal ADSL working group (EN)
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