Always under construction By Hugh Stegman nv6H

TRI-TAC Joint Tactical Communications

trmt Treatment

TRSA Terminal Radar Service Area

TRT Tropical RadioTelegraph, once owned by United Fruit Co

TRUEX Training in Urban Environment Exercise (USMC)

TS (1) thunderstorm

(2) Tropical Storm

(3) top secret

(4) time slot

(5)Telecommunications Standard (Europe)

TSA Transportation Security Administration

TSB Technical Support Branch (TPC)

TSC (1) Tactical Service Center (US Navy)

(2) TRICARE Service Center (US Navy medical)

(3) Terrorist Screening Center

(4) Technical Subcommittee (of IRAC)

(5) Training Systems Contract

(6) Training Support Center

TSCC (1) Tactical Surveillance Control Center (US Navy)

(2) Transportation Security Control Center (TSA)

(3) Trauma Symptom Checklist for Children

(4) Telemetry Standards Control Committee

(5) Telemetering Standards Coordination Committee

(6) Tracking Signal Corrections Counter

TSCM Technical surveillance countermeasures (antibugging)

TSGT Technical Sergeant

TSNO thunderstorm information not available

TSOP Thin Small Outline Package

TSP (1) Telecommunications Support Plan (NCS)

(2) Telecommunications Service Priority (NCS)

TSR Terminate and Stay Resident (IBM programming)

TSS Tangential Signal Sensitivity

TSSR Tropospheric Scatter (TROPO)-Satellite Support Radio

TTD True Time Delay

TTL (1) Transistor-Transistor Logic

(2) Time To Live (of Internet packets or DNS records)

(3) Talk To ya Later

(4) Through The Lens

TTP Trusted Third Party (for authentication of public keys)

TTT CW prefix: Distress call follows

TTWCS Tactical Tomahawk Weapon Control System

TTY Teletype

TTYL Talk (Type) To You Later (Internet)

TU (1) CW brevity: Thank you

(2) Terminal unit (old current-loop RTTY)

TUBA TCP and UDP with Bigger Addresses (possible Internet extension)

TUNES Spanish group callsign: Todos las Unidades y Establecimientos navales

TV Television

TVA Tennessee Valley Authority (big dam operator)

TVC Televisió de Catalunya (Catelan TV, Barcelona)

TVI Television interference

TVNZ Television New Zealand

TWA (1) Trailing-wire antenna (USN ELF/Tacamo)

(2) Tilt Whip Adaptor (US Army)

(3) Trans World Airways, obsolete

TWAIN (1) Toolkit Without An Important Name (Standard graphic scanner

interface)

(2) Technology Without An Interesting Name

TWAS This Was (ALE)

TWEB Transcribed Weather Broadcast

Twinplex Four-frequency duplex teleprinter system

TWLU Terminal Wireless Local area network Unit

TWR (1) tower

(2) Trans World Radio

TWT Traveling Wave Tube

TWTA Traveling Wave Tube Amplifier

TWX Teletype Wide-area eXchange

tx Transmitter, transmit, talk

TX Transmitter, transmit

TXD Transmitted Data (Serial I/O modem line)

txt (1) Extension: file is unformatted ASCII text (computers)

(2) Text

U CW brevity code: "You"

U Up

U/L (1) Uplink

(2) Upload

UA (1) Packet control frame: Unnumbered Acknowledgement

(2) User Agent (Internet)

uA Microamp

UART Universal Asynchronous Receiver/Transmitter (computer)

UAS Unmanned Aerial Systems (USCG)

UAT (1) Universal Access Transceiver

UAT (2) Until Advised (by the) Tower

U-ATA Ultra-AT Attachment

UAV Unmanned Aerial Vehicle (USAF)

UCVE Unconfined Vapor Cloud Explosion

UDP User Datagram Protocol, (streaming)

UDRE User Differential Range Error (GPS)

UDT (1) Universal Dataflow and Telecommunications

(2) Underwater Demolition Team, crack USN WWII unit

UDXF Utility DXers Forum (replaced WUN)

UEJ Unattended Expendable Jammer

uf Microfarad

UFMOP Unintentional Frequency Modulation On Pulse

UFN Until Further Notice

UFO (1) Unidentified Flying Object

(2) UHF Follow On, Navy COMSAT

UGR Unitized group ration

UHF Ultra High Frequency (300-3000 MHz)

UHS Ultra High Speed (in cards, UHS-1 & UHS-2))

UI (1) User Interface

(2) Packet designator: Unnumbered Information

(3) User Initiated

UICC Universal Integrated Circuit Card

UID User Identification

UIDL User Initiated Download

UIM Uniform Impedance Resonator

UIN Universal Internet Number (ICQ)

UK United Kingdom

UKADGE UK Air Defense Ground Environment

UKCC United Kingdom Control Center

UKMACCS United Kingdom Maritime Coastal Communications System

UKMET United Kingdom Office of Meteorology (also a model)

UKNET UK network for UUCP

UKSOF UK Satellite operations facility, part of NATO

UL (1) Upload

(2) Unauthorized launch

(3) Underwriters' Laboratories

ULS Universal Licensing System (FCC)

UM Unintentional Modulation

UMT Unit ministry team

UMTS Universal Mobile Telecommunications System (Europe)

UN United Nations

UNB Universal Magnetic Balun

uncl unclassified

UNCLASS Message is not classified [~]

UNCLOS United Nations Convention on the Law of the Sea

UNF (1) UN Forces

(2) Unformatted

UNHCR UN High Commission for Refugees

UNI User Network Interface

Unid Unidentified

Uniden Unidentified

UNIFIL UN Interim Forces, Lebanon

U-NII Unlicensed National Information Infrastructure

Univac Universal Automatic Computer, once IBM's main competition

Unix Not an acronym; computer op-system derived from MULTICS [~]

Unk Unknown

UNO United Nations Organization

UNPROFOR UN Provisional Forces

UNSCOM UN Special Commission (Iraq inspectors)

UP (1) CW prosign: "change to working frequency"

(2) unknown precipitation

UPnP Universal Plug and Play

UPS (1) Uninterruptible Power Supply

(2) United Parcel Service

UPT Universal Personal Telecommunications

UR CW brevity code: "Your"

URE Unión de Radioaficionados Españoles

Ureq User request (computer return code)

URL Universal Resource Locator (World Wide Web)

URSI International Union of Radio Science

URSIGRAM Coded solar-terrestrial report, originally from URSI

US (1) United States

(2) Unit Separator (ASCII)

USA (1) United States of America

(2) US Army

(3) Underground Service Alert ("dial before you dig")

(4) Unit self-assessment

USAAF United States Army Air Forces (WWII)

USACE US Army Corps of Engineers

USADA US Department of the Army

USAF US Air Force

USAFA US Air Force Academy

USAFAWC US Air Force Air Warfare Center

USAFE US Air Forces, Europe

USAIS US Army Intelligence and Security Command, VA

USAMMA US Army Medical Materiel Agency

USANG (1) US Army National Guard

(2) US Air National Guard

USAR (1) Urban Search & Rescue

(2) US Army Reserve

USAREUR US Army, Europe

USARSPACE US Army Space Command, part of USSPACECOM

USART Universal Synchronous/Asynchronous Receiver/Transmitter

USASC US Army Signal Command

USASCH US Army Support Command Hawaii

USASDC US Army Strategic Defense Command, now USASSDC

USASI US Army Space Institute

USASSDC US Army Space and Strategic Defense Command, formerly USASDC

USAT Ultra-Small Aperture Terminals

USAV US Army Vessel

USAWC US Army War College

USB (1) Upper Sideband

(2) Universal Serial Bus

USC (1) United States Codes (Federal statute law)

(2) Unified Space Command, now USSPACECOM

(3) Up S[pit] Creek

USCENTCOM US Central Command

USCG US Coast Guard

USCGA US Coast Guard Auxiliary

USCGC US Coast Guard Cutter

USCGR US Coast Guard Reserve

USCS US Customs Service (now CBP and ICE)

USCSIS United States Space Command Space Intelligence System

USD US Dollars

USDA US Department of Agriculture

USDOT US Department Of Transportation

USELMNORAD US element, North American Aerospace Defense Command

USENET "User Network," huge volunteer organization that propagates "News,"

not necessarily over Internet

USEUCOM US European Command

USFJ US Forces, Japan

USFS US Forest Service

USFWS US Fish and Wildlife Service

USG (1) US Gallons (about 4 liters)

(2) US Government

USGS (1) US Coast & Geodetic Survey

(2) US Geological Survey

USIA US Information Agency

USKA Union Schweizerischer Kurzwellen-Amateure (Swiss ham assn)

USLANTCOM US Atlantic Command

USM US Marshal

USMA US Military Academy

USMC US Marine Corps

USMCR US Marine Corps Reserve

USMS US Marshals Service

USMTF United States Message Text Format

USN US Navy

USNA US Naval Academy

USNG US National Guard

USNO US Naval Observatory

USNR (1) US Naval Reserve

(2) US Navy, Retired

USNS US Naval Ship

USO United Service Organizations

USOS Unshift On Space

USP University of the South Pacific (Fiji, classes by radio)

USPACOM United States Pacific Command

USPHS United States Public Health Service

USPS (1) United States Postal Service

(2) US Power Squadrons

USR (1) User

(2) US Robotics (old modem mfgr)

USS United States Ship

USSOCOM US Special Operations Command

USSOUTHCOM U.S. Southern Command

USSPACECOM U.S. Space Command

USSS United States Secret Service

USSTRATCOM U.S. Strategic Command

USTA United States Total Army

USTRANSCOM United States Transportation Command

USVI US Virgin Islands

UT (UT0 - UT3) Universal Time scales (corrected constantly)

UTB Utility Boat

UTC (1) Universal Time, Co-ordinated (corrected with leap sec.)

(2) Coordinated Universal Time

uTLD Unsponsored Top Level Domain (.biz, etc)

UTP Unshielded Twisted Pair (hardwired networks)

UUCP Unix-to-Unix Copy Program (Unix file transfer s/w)

Uudecode Unix program, converts uuencoded files back to binaries

Uuencode Unix program, converts binary files to ASCII for transfer

uuf Micro-microfarad, now pf (picofarad)

uV Microvolt

UV Ultraviolet

uW Microwatt

UWB Ultra Wideband

UWC Universal Wireless Communications consortium

UX User eXperience

UXB Unexploded Bomb

UXO Unexploded Ordnance

V (1) Voltage (electromotive force)

(2) Variable

(3) Verification

v Velocity

VA (1) CW prosign: "End of transmission"

(2) Volt-amps (as in a power supply)

(3) Veteran's Affairs (US)

VA Volcanic ash

VAAA Voice Activated Auto Attendant (telco)

VAAT Voice Activated Audio Text (telco)

VAB Vehicle Assembly Building (NASA)

VABP Voice Activated Blue Pages (telco)

VAC Volts Alternating Current

VAD Voice-Activated Dialing (telco)

VADM Vice-Admiral

VAFB Vandenberg Air Force Base (CA)

VAIVR Voice Activated Interactive Voice Response (telco)

VAL Visiting Aircraft Line

VANC Voice-Activated Network Control (telco)

VAPD Voice Activated Premier Dialing (telco)

VAS VOLMET Automation System

VASI Visual Approach Slope Indicator

VAX (1) Variable Address Extension (old DEC Computer)

(2) English vacuum cleaner brand : )

VAX/VMS VAX Virtual Memory System, op-system for above

VBI Vertical Blanking Interval (TV)

vBNS Very high speed Backbone service (US)

VBR Variable Bit Rate

VBS Visual Basic Scripting (Microsoft security nightmare)

VC (1) in the vicinity

(2) Viet Cong, obsolete

VC01 Voice Chip #1, robotic Chinese numbers station

Vcc Collector voltage

VCO Voltage-Controlled Oscillator

VDC Volts Direct Current

VDE Video Display Editor, at one time standard freeware CP/M & PC text

editor

VDL VHF Data Link (ARINC)

VDL2 VHF Data Link 2

VDLC Virtual Data Link Capability

VDLM2 VDL, Mode 2

VDSL Very high-data-rate Digital Subscriber Line

VDSL Very-high-bit-rate Digital Subscriber Line

VDT Video Display Terminal

VDU Video Display Unit

VE Volunteer Examiner (Amateur)

VEC Volunteer Examiner Coordinator (Amateur)

VENONA Old US codeword for its USSR decryption program 1943-1980 [~]

Veronica Very Easy Rodent-Oriented Net-wide Index to Computer Archives,

obsolete Gopher search engine

Veronica-2 Current Veronica database, uses Gopher, still extant

VESA Video Equipment Standards Association, computer displays

VESREP Standard report from commercial fishing vessel

VEUR European Volmet

VF (1) Voice frequency

(2) Velocity Factor

(3) Fighter squadron (USN)

VFAT Virtual File Allocation Table (MS-Windows)

VFO Variable Frequency Oscillator

VFR Visual Flight Rules

VFT Voice Frequency Telegraphy (multiplex RTTY)

VFCT Voice Frequency Carrier Telegraphy

VHF Very High Frequency (30-300 MHz)

vi Visual Editor, full-screen text editor for Unix

VICS Vehicle Information Communication System

VIN Vehicle Identification Number

VIP Very Important Person

VIS visibility

VISA Virtual Instrument Software Architecture

VISNO visibility at secondary location not available

VKO Voyska Vozdushno-Kosmicheskoy Oborony (Russian Aerospace Defense Forces), now part of VKS

VKS Vozdushno-Kosmicheskiye Sily (Russian Aerospace Forces)

VLB VESA Local Bus; PC display bus, now usually done by the PCI

VLF Very Low Frequency (3-30 kHz)

VLM Virtual Loadable Module (Novell)

VLR Visitor Location Register

VLSI Very Large-Scale Integration

VM (1) Voice mirror

(2) Virtual memory

VMC Visual Meteorological Conditions

VMEbus Versa Module Eurocard bus (computer architecture)

VMS Virtual Memory System, good but obsolete DEC OS

VNA Vietnam News Agency

VNAV Vertical Navigation

Vne Absolute top speed of an aircraft; "never exceed"

VOA Voice Of America

Vocoder Voice coder

VOH Voice Of Hope (KVOH, religious broadcaster)

VoIP Voice Over Internet Protocol

VOLMET Flight weather transmission, for planes in route

Volt Unit of electrical potential, named for Alessandro Volta

VOM Volt-Ohm Meter

VOMUX Voice Multiplexer

VOR (1) VHF Omnidirectional Ranging (Aircraft NAVAID)

(2) Voice Of Russia, off air

VORTAC Ground station combining VOR and TACAN

VOX Voice operated switching

VPEN Voyage Planning and Electronic Navigation

VPF Vertical Processing Facility (NASA)

VPN Virtual Private Network

VR (1) Voltage regulator

(2) Visual Route (air training route)

VRAM Video RAM

VRB Variable wind

VRC (1) Vehicular Radio Communications (AN/VRC-xxx)

(2) Vehicular radio configuration (Army)

(3) Vertical Redundancy Check, fancy name for parity (computers)

VRML Virtual Reality Modeling Language

VROC Vertical rate of climb

VRT Vlaamse Radio- en Televiseomroep (Belgian)

VSAT Very Small Aperture (Antenna) Terminal

VSB Vestigial SideBand (modulation)

VSC Vertical Service Code (telco features - start with *)

VSFC Virginia Space Flight Center, Wallops Island

vsh Visual Shell, clunky full-screen command interpreter for Unix

VSO Vessel Security Officer

VSWR Voltage standing wave ratio

VT (1) Vertical Tab (ASCII)

(2) Valid Time (wx forecasts)

VTnnn Series of old DEC terminals, still a popular emulation code

VTP Virtual Terminal Protocol

VTS Vessel Traffic Services

VTVM Vacuum-tube voltmeter

VU Volume Units

VUFER VHF/UHF Frequency Experimental Radio

VUSB Vestigial Upper Sideband

VUSB Vestigial Upper Sideband Television (analog TV mode)

VV Vertical Visibility (of obscured sky)

VVV CW test group

VVS Voyenno-Vozdushnye Sily Rossii, Russian Air Force

VWS Virtual Warning System

VxD Virtual Device Driver (MS-Windows)

VXO Variable Crystal Oscillator

VY CW brevity code: "Very"

W (1) Power, in watts

(2) west

(3) Position, said as "Whiskey" ("Benchmark Whiskey" is USN offset)

W3C World Wide Web Consortium

WA (1) CW prosign: word after

(2) Work Authority (railroad orders)

WAAS Wide Area Augmentation System (GPS ground enhancement)

WABNRES Worldwide Airborne Resources (command a/c)

WAC (1) Worked All Continents (amateur award)

(2) Women's Army Corps, obsolete

(3) World Aeronautical Chart

WACN Wide Area Communications Network

WAD Wide-Area Domain (computer games)

WADSP Wideband Acquisition Digital Signal Processing

WAFS World Area Forecast System, satellite delivered air wx

WAGB USCG designation for icebreaker

WAIS Wide-Area Information Server

WAM Wide Area Multilateration

WAMS Wide Area Master Station

WAN (1) Wide-Area Network

(2) Wide-Area Network Station

WAP (1) Wireless Application Protocol

(2) Wireless Access Point

WARC World Administrative Radio Conference

WARN Weather Amateur Radio Network, see SKYWARN

WARP Weather and Radar Processor

WAS (1) Wide-Area Surveillance

(2) Worked All States (US amateur award)

WAS/MTI Wide Area Surveillance/Moving Target Identification

WATS Wide Area Telephone Service

WAZ Worked All Zones (amateur award)

WB (1) Wideband

(2) CW prosign: word before

(3) Welcome Back (Internet)

(4) Warner Bros (Good movie studio, lousy TV network)

WBFM Wideband frequency modulation

WBU World Broadcasting Unions

WBU-ISOG WBU Inter-Union Satellite Operations Group

WBU-TC World Broadcasting Unions Training Centers

WCDMA Wideband Code Division Multiple Access

WCRP World Climate Research Program

WCS (1) Wireless Communications Service

(2) Waste Collection System (Space shuttle potty)

WDC World Data Center, any of several for solar-terrestrial obs

WDM Wavelength Division Multiplexing

WDDM Wavelength Division Demultiplexing

WE Western Electric

WEFAX Weather Facsimile

WEMA Work Equipment Movement Authority (railroad orders)

WEMF World Electronic Media Forum

WEP Wired Equivalent Privacy (wireless LANs; insecure)

WFAS Wildland Fire Assessment System (USFS)

WFM Wideband FM

WFN War Fighter Net

WFO Weather Forecast Office

WFU Withdrawn From Use (aircraft)

WG Working Group (ITU)

WG/SO Working Group for Surface Observations

WGI World Geophysical Interval (research observation period)

WGS-84 World Geodetic System, 1984

WHCA White House Communications Agency

WHEC High-Endurance Cutter (USCG)

WHISC Western Hemisphere Institute for Security Cooperation (see SOA)

whoami Returns name you are logged in under (Unix) [~]

whois Internet lookup program and the database [~]

WIE With Immediate Effect

WIFCOM Wirefree communications (US Navy)

Wi-Fi Wireless Fidelity, 802.11 standard interface; originally 802.11b

Wilco Voice prosign: Will comply

WIMAX Worldwide Interoperability for Microwave Access

WIMP (1) Window, Icon, Mouse, Pointer (graphical interface)

(2) Weakly Interacting Massive Particle

WINS Windows Internet Naming Service

WINSOCK Windows Sockets API, used for networking from Microsoft s/w

WISE Web-Integrated Software metrics Environment

WIU Wayside Interface Unit (railroad)

WIX USCG designation for training barque Eagle

Wkg Working

WL Wordlength, size of basic data group (computing)

WLAN Wireless Local Area Network (computing)

WLB Seagoing Buoy Tender (USCG)

WLI Inland Buoy Tender (USCG)

WLIC Inland Construction Tender (USCG)

WLIS We Love Interval Signals (Pirate broadcaster)

WLL wireless local loop

WLM Coastal Buoy Tender (Medium Endurance USCG vessel)

WLR River Buoy Tender (USCG)

WMD (1) Weapons of Mass Destruction

(2) Weapons of Mass Distraction (psyops tongue-in-cheek)

WMD-CST Weapons of Mass Destruction Civil Support Team

WMEC Medium-Endurance Cutter (USCG)

WMM (1) Wi-Fi Multimedia

(2) World Magnetic Model

WMO World Meteorological Organization

WMR World Music Radio

WMSCR Weather Message Switching Center Replacement

WMTS Wireless Medical Telemetry Service

WMV Windows Media Video

WND wind

WNW West-northwest

WO Work order

WORM Write-Once Read-Many (CD-R, allows making own CD-ROMs)

Wouff Hong Scary wooden device supposedly used on posteriors of hams

causing QRM (ARRL lore) [~]

WPA Wi-Fi Protected Access (Also WPA2)

WPB Patrol Boat (USCG)

WPC Weather Prediction Center (US)

WPM Words per minute

WPS Wi-Fi Protected Setup

WRAPA Work Restricted Authority/Protect Against (railroad orders)

WRC World Radio (Communications) Conference

WRCC Western Regional Climate Center (NOAA)

WRF Weather Research and Forecasting (model)

WRTH World Radio TV Handbook

WRU Who Are You? (RTTY)

WSHFT Wind shift

WSJT Program: Weak Signal (mode suite by) Joe Taylor

WSJT-X Latest WSJT version, includes JT9 (see JT9)

WSL Weapons Survivability Lab

WSM Weapon system manager

WSMR White Sands Missile Range (NM)

WSPR Weak-Signal Propagation Reporter (ham mode)

WSPRnet WSPR mode that uploads to a propagation database

WSO Weapon Systems Officer ("Whizzo")

WSQ Weak Signal QSO (Amateur MFSK mode; usually WSQ2)

WSRO Weapon system replacement operations

WST Weather Station

WSTF White Sands Test Facility (NM)

WSW West-southwest

WT (1) Walkie-talkie

(2) Wireless Telegraph (Morse or RTTY)

WTB (1) Wireless Telecommunications Bureau (FCC)

(2) Want To Buy (radio swap ads)

WTDD Wayside Train Defect Detector (hotbox/dragger detector)

WTGB 140' Icebreaking Tug (USCG)

WTLD Wayside Train Length Detector

WTMD Walk-Through Metal Detector

WTWW "We Transmit World Wide" (callsign)

WU Western Union

WUAN Wireless Universe Area Network

WUN World Utility News, former Internet e-mail list, now UDXF

WVDC Working Voltage, DC (capacitors)

WW Weather Warning

WWABNCPP Worldwide Airborne National Command Post Program

WWCR (1) World Wide Christian Radio (callsign)

(2) World Wide Conspiracy Radio (facetious)

WWMCCS Worldwide Military Command and Control System, obsolescent

WWNWS World Wide Navigational Warning Service

WWRB World Wide Religious Broadcasters (callsign)

WWV NIST standard frequency & time station, Boulder, CO

WWVB NIST Boulder, CO, low frequency standard broadcast

WWVH NIST standard frequency & time station, Kekaha, HI