Acronyms & Abbreviations: T - Z

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T
T-BGA	tape ball grid array
T/H	track and hold
T/R	transmit and receive
TAB	tape automated bonding
TAC	Technical Activity Committee
TACS	Total Access Communication System (British cellular)
tan	tangent
TAP	test access part
TAPI	telephone application program interface
TAT	transatlantic telephone (cable)
TAV	transverse acoustic-wave voltage
Tbit	terabit
Tbit/sec	terabits per second
TC	temperature coefficient
TCAP	transaction capabilities application part
TCC	temperature coefficient of capacitance
TCE	temperature coefficient of expansion
TCE	Technical Computing Environment
TCE	thermal coefficient of expansion
TCIF	Telecommunications Industry Forum
TCM	thermal conduction module
TCM	trellis-coded modulation
TCO	total cost of ownership
TCP	tape carrier package
TCP/IP	Transmission Control Protocol/Internet Protocol
TCR	tape carrier ring
TCR	temperature coefficient of resistance
TCXO	temperature compensated crystal oscillators
TDAC	time-domain alias cancellation (synonymous with MDCT)
TDD	time-division duplex
TDDS	time-division duplex system (communications)
TDM	time-division multiplexing (communications)
TDMA	time-division multiple access (communications)
TDR	time domain reflectometer
TE	transverse electric
TEC	thermal electrical cooler
TEGFET	2-D electron-gas field effect transistor
TEM	transverse electromagnetic
TF	transfer function
TFF	thin-film filter
TFI	transport format indicator
TFP	thin flat package
TFT	thin-film transistor
TFT-LCD	thin-film transistor liquid crystal display
THB	temperature humidity bias
THD	total harmonic distortion
THHN	Thermoplastic high heat-resistant coated nylon
3D	three-dimensional
TIA	Telecommunications Industry Association (Washington, DC)
TIA	time-interval analyzer
TIC	tape-automated bond in cap
TIFF	tagged image format file (computer graphics)
TIGA	Texas Instruments' Graphics Architecture
TiN	titanium nitride
TIR	total indicated reading
TISSS	Tester Independent Software Support System (DOD program)
TL1	Transaction Language 1
TLB	translation-look-aside buffer
TLC	thin-layer chromatography
TLIM	transmission-line model
TLM	transmission line matrix
TLM	triple-layer metal
TM	traffic management
TMC	transfer mode converter/switch port termination
TMN	Traffic Management Network
TMRC	Technology Marketing and Research Council
TMSL	test and measurement systems language
Tn	digital carrier, type n
TN	twister nematic (LC display)
TO	transistor outline package
TOP	thin outline package
TPC	Transaction Processing Council (standard)
TPC	transmit power control
tpi	tracks per inch
TPQFP	test-pad quad flat pack
TPU	time processor unit
TQC	total quality control
TQFP	tape quad flat pack
TQFP	thin quad flat pack
TQM	total quality management
Tr	transition time
TRAM	transputer random access memory (module)
triac	triac bidirectional rectifier (two SCRs used in antiparallel)
TRP	Technology-Reinvestment Program
TSB	Telecommunications Standardization Bureau
TSOP	thin small outline package
TSP	temperature-sensitive parameter
TSSOP	thin-scaled small-outline package
TSSOP	thin-shrink small-outline package
TST	time-space-time
TTC	Telecommunications Technology Committee (Japan)
TTC	time-to-collection (data acquisition)
TTL	transistor-transistor logic
TTY	teletypewriter
TUV	Technische Uberwachungs-Verein (German test lab)
TVI	TV interface
TVRO	television receive-only (DBS)
TVS	transient-voltage suppressor
TwinVQ	transform-domain-weighted interleaved vector quantization
2-D	two-dimensional
TXCO	temperature compensated oscillator
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U
uA	microampere
UART	universal asynchronous receiver-transmitter (communications)
UBR	unspecified bit rate
UBS	uninterruptible battery system
uC	microcomputer
uC	microcontroller
UCOM	Users' Committee of Foreign Semiconductors
UDI	Universal Digital Interface
UDP	User Datagram Protocol (Internet)
UDPs	user-defined primitives
UDWDM	ultradense-wavelength-division multiplexing
uF	microfarad
ug	microgram
uH	microhenry
UHF	ultrahigh frequency
UHV	ultrahigh vacuum
UIL	User Interface Language (Open Software Foundation)
UJT	unijunction transistor
UL	Underwriters' Laboratory
ULSI	ultra large-scale integration
um	micron
UMTS	Universal Mobile Telecommunication System
UN	United Nations
UNEP	United Nations Environment Program
UNI	User Network Interface (standard)
uP	microprocessor
UPnP	Universal Plug and Play (www.upnp.org)
UPC	universal product code
UPS	uninterruptible power source
UPSR	unifine pitch
US	Upstream
USART	transmitter
USAT	ultrasmall aperture terminal
USB	Universal Serial Bus
USDC	US Display Consortium
USE/DA	Users Society for Electronic Design Automation
usec	microsecond
USTA	US Telephone Association
UTC	Universal Coordinated Time
UTOPIA	Universal Test and Operations Physical Interface for Asynchronous Transfer Mode
UTP	unshielded twisted pair
UTQFP	ultrathin quad flat pack
UTRA	UMTS Terrestrial Radio Access
UTSOP	ultrathin small-outline package
UUT	unit under test
uV	microvolt
UV	ultraviolet
UV-PROM	ultraviolet-erasable PROM
UVLO	undervoltage lockout (thresholds)
uW	microwatt
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V
V	volt
V ac	volts alternating current
V dc	volts direct current
V-MOS	v-groove MOS
V/F	voltage to frequency
VA	volt-ampere
VAFC	VESA Advanced Feature Connection
VAR	value-added reseller
VAR	volt-ampere, reactive
VB	visual Basic (multimedia software)
VBI	vertical blanking interval (TV)
VBR	variable bit rate (networking) (nrt - non-real time; rt - real time)
VBX	Visual Basic extension
VC	virtual channel
VCA	voltage-controlled amplifier
VCD	variable center distance
VCI	virtual channel indicator/identifier (network)
VCIF	VESA Display Information Format
VCO	voltage-controlled oscillator
VCPU	video compression processor unit
VCR	videocassette recorder
VCSEL	vertical-cavity surface-emitting laser
VCVA	voltage-controlled variable attenuator
VCXO	voltage-controlled crystal oscillator
VDE	visual development environment
VDE	video-decompression engine
VDSL	very high-rate digital subscriber line (40 Mbps downstream)
VESA	Video Electronics Standards Association
VF	vacuum fluorescent (display)
VF	voice frequency (300 to 3400 Hz)
VFC	voltage-to-frequency converter
VFD	vacuum fluorescent display
VFEA	VMEbus Futurebus + Extended Architecture
VFO	variable-frequency oscillator
VGA	video-graphics adapter
VGA	video-graphics array
VGA	video graphic accelerator (circuit)
VGA	Video Graphics Adapter
VHADSL	very-high-bit-rate asymmetric digital subscriber line
VHDL	very-high-density logic
VHDL	very-high-speed integrated-circuit hardware-description language
VHDSL	very-high-bit rate digital subscriber line
VHF	very high-frequency (30 kHz to 300 MHz)
VHSIC	very high-speed IC
VIL	vertical in-line
VISA	virtual instrument software architecture
VISA	VXI System Alliance (standard)
VITA	VMEbus International Trade Association
Vital	VHDL Initiative Toward ASIC Libraries (organization)
VLAN	virtual local-area network
VL Bus	VESA local bus
VLC/VLD	variable length coding, variable length decoding
VLF	very low frequency (below 30 kHz)
VLIW	very long instruction word (computer architecture)
VLS	virtual library system
VLSI	very-large-scale integration
VMC	VESA Media Channel (bus)
VME	versa module eurocard
VME	virtual machine environment
VMEbus	versatile modular E-bus (from former VERSAbus-E)
VMTP	Versatile Message Transaction Protocol (communications)
VNA	vector network analyzer
VOD	video-on-demand
VoIP	voice over Internet Protocol
VOST	VESA Open Set Top (group)
VOX	voice-operated threshold (communications)
VP	virtual path
VP	video processor
VPAK	vertical package
VPCI	virtual path connection identifier
VPD	vapor phase dissolution
VPE	vapor phase epitaxy
VPEC	Virginia Power Electronics Center (Blacksburg, VA)
VPI	virtual path indicator/identifier (network)
VPM	vertical package module
VPN	virtual private network
VPP	VXI Plug-and-Play (systems alliance)
VPS	vapor phase soldering
VQ	vector quantization
VQFP	very-fine-pitch quad flat pack
VR	virtual reality
VRAM	video random-access memory
VRD	virtual retina display
VRM	voice recognition module
VROOMM	Virtual Runtime Object-Oriented Memory Manager
versus	versus
vs	versus
VSAT	very small aperature terminal (satellite transceiver with 30-40cm disk)
VSB	vestigial sideband
VSB	VME Subsystem bus
VSELP	vector-sum excited linear-predictive (speech coding)
VSIM	virtual surface image memory
VSO	very small-outline
VSOP	very small outline package (Japanese MFP)
VSS	VHDL system simulator
VSWR	voltage standing-wave ratio (RF and microwave)
VTCO	voltage-temperature cutoff (battery charging)
VTVM	vacuum tube Voltmeter
VU	volume unit (meter)
VXCO	voltage-controlled crystal oscillator
VXI	VME eXtensions for Instrumentation
VXIbus	VMEbus eXtension for Instrumentation
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W
W	watt
WAIS	wide-area information server (Internet)
WAN	wide-area network
WAP	Wireless Application Protocol
WB	wire bonded
WDM	wavelength-division multiplexing
WFQ	weighted fair queuing
Whr	watthour
WLAN	wireless local area network
WLL	wireless local loop
WMA	Windows Media Audio
WML	Wireless Markup Language
WORM	write once, read many (optical desk)
wPKI	wireless public-key infrastructure)
wpm	words per minute
WRAM	window RAM
WRED	weighted random early discard
WRR	weighted round robin
WSI	wafer scale integration
WTLS	wireless transport-layer security
WUT	wafer under test
WWW	World Wide Web of the Internet
WYSIWYG	what you see is what you get
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X
X-MOS	high-speed metal-oxide semiconductor
XA	extended architecture (CD-ROM)
XDR	external data representation
xDSL	Digital Subscriber Line
XGA	extended graphics adapter
XIP	execute-in-place
XIWT	Cross-Industry Working Team (information transmission)
XML	eXtensible Markup Language
XPG	X/Open Portability Guide (standard group)
XRF	x-ray fluorescence (spectroscopy)
XTP	Express Transfer Protocol (communications)
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Y
YAG	ytrrium-aluminum garnet
YIG	yttrium iron garnet (microwave device material)
YTD	year to date
YUV	luminance/chrominance
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Z
ZCS	zero-current switching
ZIF	zero insertion force
ZIP	zigzag-in-line package
ZnO	zinc oxide
ZVS	zero-voltage switching
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