Avionics Magazine presents the third edition of our comprehensive Aerospace Acronym Guide. Since we started compiling the list in 2002, the number of acronyms and abbreviations has grown by 660 entries, from 2,306 to 2,966.
Though it is not an exhaustive list, we trust it will serve you well.
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UA unmanned aircraft
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UA unnumbered acknowledgment
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UART universal asynchronous receiver transmitter
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UAS unmanned aircraft systems
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UAT universal access transceiver
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UAT universal access transponder
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UATP universal air travel plan
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UAV unmanned air vehicle
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UBI uplink block identifier
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UCD universal cockpit display
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UCI user computer interface
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UD user data
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UDF unducted fan
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UDP user datagram protocol
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UHF ultra-high frequency
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UI unnumbered information
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UIR upper information region
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UL uplink
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ULV ultra-low voltage
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ULWG upper layer working group
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UML unified modeling language
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UMTS universal mobile telecommunications system
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UP universal platform
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UPRM universal platform resource management
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UPS uninterruptible power supply
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UPS United Parcel Service
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UPSMS UPS management supply
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URET user request evaluation tool
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URL universal resource locator
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USB universal serial bus
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USC United States code
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USCG U.S. Coast Guard
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UTC universal time coordinated
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UTP unshielded twisted pair
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UV ultraviolet
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UUT unit under test
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UWB ultra wide-band
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