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UI user interface
(en)
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UI unnumbered information (HDLC)
(en)
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UICC universal integrated chip card (USIM)
(en)
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UID user ID
(en)
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UID unique identifier
(en)
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UIFN universal international freephone number (ITU)
(en)
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UIML user interface markup language (XML)
(en)
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UIN unique identification number
(en)
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UIN universal Internet number
(en)
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UKW Ultra Kurzwelle
(de)
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UKW Ultra Kurzwelle
(de)
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UL uplink
(en)
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UL underwriter laboratory
(en)
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UL-ToA uplink time of arrival (location)
(en)
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ULE ultra lightweight encapsulation (IP)
(en)
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ULF ultra low frequency
(en)
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ULH ultra long haul
(en)
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ULL ultra low latency (5G)
(en)
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ULP upper level protocol (FC)
(en)
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ULP upper layer protocol (OSI)
(en)
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ULP ultra low power Bluetooth
(en)
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ULSI ultra large scale integration (IC)
(en)
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ULV ultra low voltage
(en)
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UMA upper memory area (memory)
(en)
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UMA unlicensed mobile access (GPRS)
(en)
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UMA uniform memory access (memory)
(en)
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UMB upper memory block
(en)
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UMB ultra mobile broadband (3GPP2)
(en)
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UMD universal media disc (Sony)
(en)
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UME UNI management entity (ATM)
(en)
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UMG universal media gateway (NGN)
(en)
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UML unified modelling language (Internet)
(en)
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UMPC ultra mobile personal computer
(en)
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UMS unified messaging service
(en)
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uMTC ultra-reliability machine-type communication (5G)
(en)
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UMTS universal mobile telecommunications system (mobile communications)
(en)
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