Z

ZBR         Zero Bug Release

ZD          Zero Defects

ZF          Zero Flag 

Y

Y2K         Year 2000

YIQ         (color components in NTSC color space)

YUV         (color components in SECAM and PAL color spaces)

X

XA          EXtended Architecture

XIP         Execute In Place

XLT         Transaction List Table

XMS         Extended Memory Specification

XT          eXtended Technology

W

W3          World Wide Web

W4WG        Windows for Workgroups

WABI        Windows Application Binary Interface

WAIS        Wide Area Information Service

WAN         Wide Area Network

WATM        Wireless ATM

WATS        Wide Area Telecommunications Service

WHAT        Wireless Hybrid Asynchronous Time-bounded

WIMP        Windows, Icons, Mice and Pointers

WINS        Windows Internet Name Service

WMAC        Wireless Media Access Control

WMF         Windows metafile

WORM        Write Once, Read Many times

WOSA        Windows Open Services/Systems Architecture

WRED        Wrong Reading Emulsion Down

WREU        Wrong Reading Emulsion Up

WS          WorkStation

WTO         Write To Operator

WUS         Word Underscore

WWW         World Wide Web

WXTRN       Weak External Reference

WYSIWYG     What You See Is What You Get

V

VAD         Value Added Dealer

VAN         Value Added Network

VAP         Value Added Process

VAR         Value Added Reseller

VAST        Virtual Archive Storage Technology

VB          Visual Basic

VBA         Visual Basic for Applications

VBR         Variable Bit Rate

VBN         Vermitteltes Breitbandnetz

VC          Virtual Circuit

VC-SDRAM    Virtual Channel SDRAM

VCC         Virtual Circuit Connection

VCI         Virtual Circuit Identifier

VCNA        Vtam Communication Network Application

VCPI        Virtual Control Program Interface

VDAC        Video Digital Analog Converter

VDI         Video Display Interface

VDT         Video Display Terminal

VDU         Visual Display Unit

VERONICA    Very Easy Rodent-Oriented Netwide Index to Computerized Archives

VGA         Video Graphics Array

VGC         Video Graphics Controller

VGM         Video Graphics Monitor

VHDSL       Very High-bit rate Digital Subscriber Loop

VHLL        Very High-Level Language

VHS         Video Home System

VIO         Video Input/Output

VIO         Virtual Input/Output

VIPA        Virtual IP Addressing

VLAN        Virtual LAN

VLSI        Very Large Scale Integration

VM          Virtual Machine

VM/SP       Virtual Machine / System Product

VMMAP       VM Monitor Analysis Program

VMOS        Vertical MOS

VMPPF       VM Performance Planning Facility

VMPRF       VM Performance Reporting Facility

VMS         Virtual Management System

VOD         Video On Demand

VPD         Vital Product Data

VPDN        Virtual Private Data Network

VPI         Virtual Path Identifier

VPN         Virtual Private Network

VR          Virtual Reality

VRAM        Video RAM

VRML        Virtual Reality Modeling Language

VRC         Vertical Redundancy Checking

VS          Virtual Storage

VSAM        Virtual Storage Access Method

VSAT        Very Small Aperture Terminal

VSM         Virtual Storage Management

VSN         Volume Serial Number

VT          Vertical Tab

VTAM        Virtual Telecommunications Access Method

VTOC        Volume Table of Contents

VTP         Virtual Terminal Protocol

VTP         Virtual Terminal Program

VTX         VideoTeXt

VVDS        VSAM Volume Data Set

U

UA          User Agent

UAE         Unrecoverable Application error

UART        Universal Asynchronous Receiver/Transmitter

UBR         Undefined Bit Rate

UBS         Unit Backspace

UCB         Unit Control Block

UCR         Undercolor removal

UCS         Universal Character Set

UCSB        Universal Character Set Buffer

UCW         Unit Control Word

UDP         User Datagram Protocol

UI          User Interface

UID         User ID

UMB         Upper Memory Block

UNC         Universal Naming Convention

UNC         Universal Network Convention

UPC         Universal Product Code

UPS         Uninterruptible Power Supply

UPSI        User Program Switch Indicator

UR          Unit Record

URL         Uniform Resource Locator

US          Unit Separator

USART       Universal Synchronous/Asynchronous Receiver/Transmitter

USENET      USEr NETwork

USM         UnSharp Masking

USRT        Universal Synchronous Receiver/Transmitter

USV         Unterbrechungsfreie StromVersorgung

UTP         Unshielded Twisted Pair

UUCP        Unix-to-Unix Copy Program

T

T1          1.544 Mbit/s

T3          45 Mbit/s

TARGA       Truevision Advanced Raster Graphics Adapter

TB          TeraByte (1,099,511,627,776 bytes)

TC          Terminal Control

TCA         Task Control Area

TCAM        Telecommunications Access Method

TCB         Task Control Block

TCL         Tool Command Language

TCM         Thermal Conduction Module

TCO         Triple Capacity Option

TCP         Terminal Control Program

TCP         Transmission Control Protocol

TCP/IP      Transmission Control Protocol/Internet Protocol

TCT         Terminal Control Table

TCTTE       Terminal Control Table Terminal Entry

TCU         Transmission Control Unit

TD          Transient Data

TDIA        Transient Data Input Area

TDM         Time-Division Multiplexing

TDOA        Transient Data Output Area

TDP         Transient Data Program

TEO         Technical Electronic Office

TF          Trap Flag

TIC         Technical Integrity Check

TIFF        Tagged Image File Format

TIOA        Terminal Input/Output Area

TLB         Translation Lookaside Buffer

TLBL        Tape Label

TMO         Thermo-Magneto-Optic technology

TNEF        Transport-Neutral Encapsulation Format

TOC         Table Of Contents

TOP         Technical Office Protocol

TPDU        Transport Protocol Data Unit

TPF         Transaction Processing Facility

TPI         Tracks Per Inch

TPM         Third-Party Maintenance

TPS         Transactions Per Second

TRN         Transparent

TS          Telecommunication System

TS          Temporary Storage

TSIOA       Temporary Storage Input/Output Area

TSO         Time Sharing Option

TSP         Temporary Storage Program

TSR         Terminate and Stay Resident

TTA         Teletex Attachment (Teletexzusatz)

TTL         Transistor Transistor Logic

TTR         Track Record

TTY         TeleTYpe

TWA         Transaction Work Area

TWA         Two-Way Alternate

TWS         Two-Way Simultaneous

TX          Telex

TXT         Text