| UA |
User agent
|
| UADSL |
Universal ADSL
|
| UAK |
User-authentication key
|
| UART |
Universal Asynchronous Receiver Transmitter
|
| UAV |
Unmanned Aerial Vehicle
|
| UAWG |
Universal ADSL Working Group
|
| UBR |
Unspecified bit rate
|
| UBT |
Ubiquitous bus technology
|
| UCC |
Uniform Code Council
|
| UCD |
Uplink Channel Descriptor
|
| UCP |
Universal computer protocol
|
| UCS |
Uniform communication standard
|
| UDP |
User Datagram Protocol
|
| UE |
User Equipment
|
| UGS |
Unsolicited Frant Service
|
| UHF |
Ultra High Frequency
|
| UI |
User interface
|
| UIM |
User Identity Module
|
| ULC |
Ultra Low Cost
|
| ULH |
Ultra-long-haul
|
| ULP |
Ultra Low Power
|
| ULS |
Universal Licensing System
|
| UM |
Unlicensed Mobile Access
|
| UMB |
Ultra Mobile Broadband
|
| UML |
Unified modeling language
|
| UMTS |
Universal Mobile Telecommunications System
|
| UMTS |
Universal Mobile Telecommunications Service
|
| UMTS |
Universal Mobile Telecommunications System
|
| UN |
United Nations
|
| UNE |
Unbundled network element
|
| UNH-IOL |
University of New Hampshire-Interoperability Laboratory
|
| UNI |
User network interface
|
| UNII |
Unlicensed National Information Infrastructure
|
| UOL |
Unbundled optical loop
|
| UPC |
Uplink Power Control /Usage parameter control
|
| UPI |
User personal identification
|
| UPSR |
Unidirectional Path-Switched Ring
|
| URI |
Uniform Resource Identifier
|
| URL |
Universal Resource Locator
|
| USART |
Universal Synchronous/asynchronous Receiver/Transmitter
|
| USB |
Universal Serial Bus
|
| USIF |
Universal Serial Interface
|
| USTA |
United States Telephone Association
|
| Utopia |
Universal Test and Operations Interface for ATM
|
| UTRA |
UMTS Terrestrial Radio Access
|
| UTS |
Universal Telephone Service
|
| UWB |
Ultra-Wideband
|
| UWB SRR |
Ultra Wideband Short Range Radar
|