CIW Certification/Acronyms

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This is a glossary of acronyms commonly used when studying for any of the ProSoft CIW Certification Exams

To add new definitions, please use the format:

;item
: the item's definition and explanation paragraph, if any
Contents: Top - 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A[edit]

AADS 
Ameritech Advanced Data Systems

Ameritech (NYSE: AIT) serves millions of customers in 50 states and 40 countries. Ameritech provides a full range of communications services including local and long-distance telephone and data, cellular, paging, security, cable TV, Internet and more. One of the world's 100 largest companies, Ameritech (www.ameritech.com) has 70,500 employees, 1 million shareowners and more than $30 billion in assets. Ameritech also operates the Internet Network Access Point (NAP) in Chicago, the largest Asynchronous Transfer Mode (ATM) access point in the world. Ameritech has also been selected by the National Science Foundation as the global NAP for the next generation Internet initiative. iCAIR Press Release February 1999

ACH 
Automated Clearing House

Automated Clearing House (ACH) is the name of an electronic network for financial transactions in the United States. ACH processes large volumes of both credit and debit transactions which are originated in batches.- More From Wikipedia -

ACL 
Access Control List

In computer security, an access control list (ACL) is a list of permissions attached to an object. The list specifies who or what is allowed to access the object and what operations are allowed to be performed on the object. - More From Wikipedia -

AD 
Active Directory

Active Directory (AD) is an implementation of LDAP directory services by Microsoft for use primarily in Windows environments. The main purpose of Active Directory is to provide central authentication and authorization services for Windows based computers. - More From Wikipedia -

ADO 
ActiveX Data Object

Microsoft ActiveX Data Objects (ADO) is a set of Component Object Model objects for accessing data sources. It provides a layer between programming languages and OLE DB (a means of accessing data stores in a uniform manner), which allows a developer to write programs which access data, without knowing how the database is implemented. - More From Wikipedia -

ADOdb 
ActiveX Data Object Database

ADOdb is a database abstraction library for PHP and Python based on the same concept as Microsoft's ActiveX Data Objects. It allows developers to write applications in a fairly consistent way regardless of the underlying database storing the information. The advantage is that the database can be changed without re-writing every call to it in the application. - More From Wikipedia -

ADR 
Advanced Data Recording
ADSL 
Asymmetric Digital Subscriber Line

Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. - More From Wikipedia -

AFP 
Apple File Protocol

The Apple Filing Protocol (AFP) is a layer 6 (presentation layer) network protocol that offers file services for Mac OS X and Classic Mac OS. - More From Wikipedia -

AH 
Authentication Header

AH is a protocol that provides authentication of either all or part of the contents of a datagram through the addition of a header that is calculated based on the values in the datagram. - More From TCP/IP Guide -

AM 
Amplitude Modulation

Amplitude modulation (AM) is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. - More From Wikipedia -

AMI 
Alternate Mark Inversion

When used on a T-carrier, bipolar encoding is known as Alternate Mark Inversion because, in this context, a binary 1 is referred to as a "mark", while a binary 0 is called a "space".[2] The coding was used extensively in first-generation PCM networks, and is still commonly seen on older multiplexing equipment today. - More From Wikipedia -

ANS 
Advanced Network Services
ANSI 
American National Standards Institute

The American National Standards Institute or ANSI (IPA pronunciation: [ænsiː]) is a private nonprofit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States. - More From Wikipedia -

AP 
Access Point

In computer networking, a wireless access point (WAP or AP) is a device that connects wireless communication devices together to form a wireless network. - More From Wikipedia -

API 
Application Program Interface

An application programming interface (API) is a source code interface that a computer application, operating system or library provides to support requests for services to be made of it by a computer program. - More From Wikipedia -

APIPA 
Automatic Private IP Addressing

Zeroconf or Zero Configuration Networking is a set of techniques that automatically create a usable IP network without configuration or special servers. (Redirected from APIPA) - More From Wikipedia -

ARP 
Address Resolution Protocol

In computer networking, the Address Resolution Protocol (ARP) is the standard method for finding a host's hardware address when only its network layer address is known. - More From Wikipedia -

ARPA 
Advanced Research Projects Agency

The Defense Advanced Research Projects Agency (DARPA) is an agency of the United States Department of Defense responsible for the development of new technology for use by the military. (Redirected from Advanced Research Projects Agency) - More From Wikipedia -

ARPANET 
Advanced Research Projects Agency Network

The Advanced Research Projects Agency Network (ARPANET) developed by DARPA of the United States Department of Defense was the world's first operational packet switching network, and the predecessor of the global Internet. - More From Wikipedia -

ASCII 
American Standard Code for Information Interchange

American Standard Code for Information Interchange (ASCII) is a character encoding based on the English alphabet. ASCII codes represent text in computers, communications equipment, and other devices that work with text. - More From Wikipedia -

ASF 
Advanced Streaming Format

Advanced Systems Format (formerly Advanced Streaming Format) is Microsoft's proprietary digital audio/digital video container format, especially meant for streaming media. - More From Wikipedia -

ASP 
Active Server Pages / Application Service Provider

Active Server Pages (ASP) is Microsoft's server-side script engine for dynamically-generated web pages. It is marketed as an add-on to Internet Information Services (IIS). - More From Wikipedia - An application service provider (ASP) is a business that provides computer-based services to customers over a network. - More From Wikipedia -

ATM 
Asynchronous Transfer Mode

Asynchronous Transfer Mode (ATM) is a cell relay, packet switching network and data link layer protocol which encodes data traffic into small (53 bytes; 48 bytes of data and 5 bytes of header information) fixed-sized cells. ATM provides data link layer services that run over Layer 1 links. [Asynchronous Transfer Mode (ATM) is a cell relay, packet switching network and data link layer protocol which encodes data traffic into small (53 bytes; 48 bytes of data and 5 bytes of header information) fixed-sized cells. ATM provides data link layer services that run over Layer 1 links. - More From Wikipedia -

ATVEF 
Advanced Television Enhancement Forum
AU 
Unix Audio
AV 
Anti-Virus

Antivirus software consists of computer programs that attempt to identify, thwart and eliminate computer viruses and other malicious software (malware). - More From Wikipedia -


AVI 
Audio Visual Interleaved

Audio Video Interleave, known by its acronym AVI, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows technology. AVI files can contain both audio and video data in a standard container that allows synchronous audio-with-video playback. - More From Wikipedia -

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B[edit]

B2B 
Business to Business

Business-to-business or B2B is a term commonly used to describe the transaction of goods or services between businesses. - More from Wikipedia -

B2E 
Business to Employee

Business-to-employee (B2E) electronic commerce uses an intrabusiness network which allows companies to provide products and/or services to their employees. - More from Wikipedia -

B2G 
Business to Government

Business-to-government e-commerce (B2G) networks allow businesses to bid on government RFPs in a reverse auction fashion. Public sector organizations (PSO's) post tenders in the form of RFP's, RFI's, RFQ's etc. and suppliers respond to them. - More from Wikipedia -

BASH 
Bourne Again Shell

Bash is a Unix shell written for the GNU Project. The name of the actual executable is bash. Its name is an acronym for Bourne-again shell. - More from Wikipedia -

BDC 
Backup Domain Controller

In Windows NT 4 server domains, the Backup Domain Controller (BDC) is a computer that has a copy of the user accounts database. - More from Wikipedia -

BERT 
Bit-Error Rate Test
BGP 
Border Gateway Protocol

The Border Gateway Protocol (BGP) is the core routing protocol of the Internet. It works by maintaining a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). - More from Wikipedia -

BIND 
Berkeley Internet Name Domain

BIND (Berkeley Internet Name Domain) is the most commonly used DNS server on the Internet, especially on Unix-like systems, where it is a de facto standard. - More from Wikipedia -

BLOB 
Binary Large Object

A binary large object, also known as a blob, is a collection of binary data stored as a single entity in a database management system. - More from Wikipedia -

BMP 
Bitmapped

The BMP file format, sometimes called bitmap or DIB file format (for device-independent bitmap), is an image file format used to store bitmap digital images, especially on Microsoft Windows and OS/2 operating systems. - More from Wikipedia -

BNC 
Bayonet Nut Connector / Bayonet Neill Concelman / British Naval Connector

The BNC connector is used for RF signal (typically pro-video) connections, both for analog and Serial Digital Interface video signals. - More from Wikipedia -

BPS 
Bits per second

In telecommunications and computing, bitrate is the number of bits that are conveyed or processed per unit of time. - More from Wikipedia -

BRI 
Basic Rate Interface

Basic rate interface (BRI, 2B+D, 2B1D) is an Integrated Services Digital Network (ISDN) configuration defined in the physical layer standard I.430 produced by the ITU. - More from Wikipedia -

BSD 
Berkeley Software Distribution

Berkeley Software Distribution (BSD, sometimes called Berkeley Unix) is the UNIX derivative distributed by the University of California, Berkeley, starting in the 1970s. - More from Wikipedia -

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C[edit]

C2B 
Consumer to Business

Consumer-to-business (C2B ) is an electronic commerce business model in which consumers (individuals) offer products and services to companies and the companies pay them. This business model is a complete reversal of traditional business model where companies offer goods and services to consumers (business-to-consumer = B2C). - More from Wikipedia -

C2C 
Consumer to Consumer

Consumer-to-consumer (or C2C) electronic commerce involves the electronically-facilitated transactions between consumers through some third party. A common example is the online auction, in which a consumer posts an item for sale and other consumers bid to purchase it; the third party generally charges a flat fee or commission. - More from Wikipedia -

CA 
Certification Authority

In cryptography, a certificate authority or certification authority (CA) is an entity which issues digital certificates for use by other parties. It is an example of a trusted third party. CAs are characteristic of many public key infrastructure (PKI) schemes. There are many commercial CAs that charge for their services. Institutions and governments may have their own CAs, and there are also free CAs. - More from Wikipedia -


CAN 
Campus Area Network

A campus area network (CAN) is a computer network made up of an interconnection of local area networks (LANs) within a limited geographical area. It can be considered one form of a metropolitan area network, specific to an academic setting. - More from Wikipedia -

CAU 
Controlled Access Unit
CDF 
Channel Definition Format

Channel Definition Format (CDF) is an XML standard used in conjunction with Microsoft Active Channel and Smart Offline Favorites technologies. Its use is to define a website's content and structure. - More from Wikipedia -

CGI 
Common Gateway Interface

The Common Gateway Interface (CGI) is a standard protocol for interfacing external application software with an information server, commonly a web server. This allows the server to pass requests from a client web browser to the external application. The web server can then return the output from the application to the web browser. - More from Wikipedia -

CHAP 
Challenge Handshake Authentication Protocol

CHAP is an authentication scheme used by Point to Point Protocol (PPP) servers to validate the identity of remote clients. - More from Wikipedia -

CIDR 
Classless Inter-Domain Routing

Classless Inter-Domain Routing (CIDR, pronounced "cider") was introduced in 1993 and is the latest refinement to the way IP addresses are interpreted. - More from Wikipedia -

CIR 
Committed Information Rate

Committed Information Rate or CIR in a Frame relay network is the average bandwidth for a virtual circuit guaranteed by an ISP to work under normal conditions. At any given time the bandwidth should not fall below this committed figure. It is usually expressed in kilobits per second (kbit/s). - More from Wikipedia -

CNAME 
Canonical Name
CO 
Central Office
CODEC 
Compressor/Decompressor / Coder/Decoder

A codec is a device or program capable of performing encoding and decoding on a digital data stream or signal. The word codec may be a combination of any of the following: 'Compressor-Decompressor', 'Coder-Decoder', or 'Compression/Decompression algorithm'. - More from Wikipedia -

COM 
Common Object Model

Component Object Model (COM) is a platform for software componentry introduced by Microsoft in 1993. It is used to enable interprocess communication and dynamic object creation in any programming language that supports the technology. - More from Wikipedia -

CORBA 
Common Object Request Broker Architecture

The Common Object Request Broker Architecture (CORBA) is a standard defined by the Object Management Group (OMG) that enables software components written in multiple computer languages and running on multiple computers to work together. - More from Wikipedia -

CPAN 
Comprehensive Perl Archive Network

CPAN is an acronym standing for Comprehensive Perl Archive Network, an archive of over 12,200 modules of software written in Perl, as well as documentation for it. - More from Wikipedia -

CPU 
Central Processing Unit

A central processing unit (CPU), or sometimes simply processor, is the component in a digital computer capable of executing a program. - More from Wikipedia -

CRC 
Cyclical Redundancy Check

A cyclic redundancy check (CRC) is a type of function that takes as input a data stream of any length and produces as output a value of a certain fixed size. The term CRC is often used to denote either the function or the function's output. - More from Wikipedia -

CSMA/CA 
Carrier Sense Multiple Access / Collision Avoidance

In computer networking, CSMA/CA belongs to a class of protocols called multiple access methods. CSMA/CA stands for: Carrier Sense Multiple Access With Collision Avoidance. In CSMA, a station wishing to transmit has to first listen to the channel for a predetermined amount of time so as to check for any activity on the channel. If the channel is sensed "idle" then the station is permitted to transmit. If the channel is sensed as "busy" the station has to defer its transmission. - More from Wikipedia -

CSMA/CD 
Carrier Sense Multiple Access / Collision Detection

Carrier Sense Multiple Access With Collision Detection (CSMA/CD) is a network control protocol in which a carrier sensing scheme is used. A transmitting data station that detects another signal while transmitting a frame, stops transmitting that frame, transmits a jam signal, and then waits for a random time interval before trying to send that frame again. - More from Wikipedia -

CSNW 
Client Services for NetWare
CSS 
Cascading Style Sheet

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML and XHTML. - More from Wikipedia -

CSU 
Channel Service Unit

In telecommunications, a channel service unit (CSU) is a line bridging device for use with T-carrier. - More from Wikipedia -

CSU/DSU 
Channel Service Unit/Data Service Unit

A CSU/DSU (Channel Service Unit/Data Service Unit) is a digital-interface device used to connect a router to a digital circuit such as a T1 or T3 line. A CSU/DSU operates at the physical layer (layer 1) of the OSI model. - More from Wikipedia -

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D[edit]

DARPA 
Defense Advanced Research Projects Agency
DBMS 
Database Management Systems
DC 
Domain Controller
DCE 
Data Communication Equipment
DCOM 
Distributed Component Object Model
DDS 
Dataphone Digital Service / Digital Data Storage / Digital Data Service
DES 
Data Encryption Service
DHCP 
Dynamic Host Configuration Protocol
DHTML 
Dynamic HTML
DLC 
Data Link Control
DLL 
Data Link Library / Dynamic Linked Library
DMZ 
Demilitarized Zone
DNS 
Domain Name Service / Domain Name Server / Domain Name System
DOD 
Department of Defense
DOS 
Denial of Service
DPN 
Dedicated Private Network
DSL 
Digital Subscriber Line
DSU
Data Service Unit / Digital Service Unit
DSSS 
Direct Sequence Spread Spectrum
DTD 
Document Type Definition
DTE 
Data Terminal Equipment
DUN 
Dial-Up Network
DVD 
Digital Versatile Disk / Digital Video Disk
DVMRP 
Distance Vector Multicast Routing Protocol

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E[edit]

EAP 
Extensible Authentication Protocol
EBT 
Electronic Benefits Transfer
ECMAScript 
European Computer Manufacturers Association Scripting
EDI 
Electronic Data Interchange
EFS 
Encrypting File System
EGP 
Exterior Gateway Protocol
EMI 
ElectroMagnetic Interference
EPS 
Encapsulated PostScript
ERP 
Enterprise Resource Planning
ESD 
Electrostatic Discharge
EULA 
End-User License Agreement

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F[edit]

FAT 
File Allocation Table
FDDI 
Fiber Distributed Data Interface
FDM 
Frequency Division Multiplexing
FHSS 
Frequency Hopping Spread Spectrum
FM 
Frequency Modulation
FQDN 
Fully Qualified Domain Name
FTP 
File Transfer Protocol
FTPd 
File Transfer Protocol Daemon

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G[edit]

G2B 
Government to Business
G2C 
Government to Consumer
GBIC 
Gigabit Interface Converter
GIF 
Graphics Interchange Format
GPO 
Group Policy Object
GUI 
Graphical User Interface
GSNW 
Gateway Services for NetWare

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H[edit]

HDLC 
High-Level Data Link Control
HDML 
Handheld Device Markup Language
HDSL 
High Data Rate Digital Subscriber Line
HP 
Hewlett-Packard
HTML 
Hypertext Markup Language
HTTP 
Hypertext Transfer Protocol
HTTPd 
Hypertext Transfer Protocol Daemon
HTTPS 
Hypertext Transfer Protocol Secure

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I[edit]

IAB 
Internet Architecture Board
IANA 
Internet Assigned Numbers Authority
IBM 
International Business Machines
ICA 
Independent Computer Architecture
ICANN 
Internet Corporation for Assigned Names and Numbers
ICMP 
Internet Control Message Protocol
ICS 
Internet Connection Sharing
IE 
Internet Explorer
IEEE 
Institute of Electrical and Electronics Engineers
IETF 
Internet Engineering Task Force
IGMP 
Internet Group Multicast Protocol
IHL 
Internet Header Length
IIS 
Internet Information Server
IKE 
Internet Key Exchange
IMAP 
Internet Message Access Protocol
IMAP4 
Internet Message Access Protocol version 4
INI (file) 
Initialization File
INND 
Internet News Daemon
IOTP 
Internet Open Trading Protocol
IP 
Internet Protocol
IPP 
Internet Printing Protocol
IPSec 
Internet Protocol Security
IPv4 
Internet Protocol version 4
IPv6 
Internet Protocol version 6
IPX 
Internetwork Packet Exchange
IPX/SPX 
Internetwork Packet Exchange / Sequence Packet Exchange
IRC 
Internet Relay Chat
IRQ 
Interrupt Request
IRTF 
Internet Research Task Force
ISA 
Industry Standard Architecture
ISAPI 
Internet Server Application Programming Interface
ISDN 
Integrated Services Digital Network
ISM 
Industrial, Scientific, and Medical
ISO 
International Organization for Standardization
ISP 
Internet Service Provider
IT 
Information Technology
ITSP 
Internet Telephony Service Provider
ITU 
International Telecommunications Union

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J[edit]

JDBC 
Java Database Connectivity
JPEG 
Joint Photographics Experts Group
JSAPI 
Java Speech API
JSML 
Java Speech Markup Language
JSP 
Java Server Pages
JVM 
Java Virtual Machine

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K[edit]

Kbps
Kilobits per second

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L[edit]

L2F 
Layer 2 Forwarding
L2TP 
Layer 2 Tunneling Protocol
LAN 
Local Area Network
LC 
Local Connector
LCP 
Link Control Protocol
LDAP 
Lightweight Directory Access Protocol
LLC 
Logical Link Control
LPD 
Line Printer Daemon
LPQ 
Line Printer Queue
LPR 
Line Printer Remote

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M[edit]

MAC 
Media Access Control / Medium Access Control
MAPI 
Message Application Programming Interface
MAU 
Multistation Access Unit
MD5 
Message Digest 5
MDI 
Media Dependent Interface
MDIX 
Media Dependent Interface Crossover
MIB 
Management Information Base
MIDI 
Musical Instrument Digital Interface
MIME 
Multipurpose Internet Mail Extension
MMF 
MultiMode Fiber
MPEG 
Moving Picture Experts Group
MSAU 
MultiStation Access Unit
MX 
Mail Exchange

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N[edit]

NADN 
Nearest Active Downstream Neighbor
NAP 
Network Access Point
NAT 
Network Address Translation
NAUN 
Nearest Active Upstream Neighbor
NCP 
NetWare Core Protocol
NCSA 
National Center for Supercomputing Applications
NES 
Netscape Enterprise Server
NDS 
Novell Directory Services / NetWare Directory Services
NetBEUI 
NetBIOS Enhanced User Interface
NetBIOS 
Network Basic Input Output System
NFS 
Network File System
NIC 
Network Interface Card
NIS 
Network Information Service
NLM 
NetWare Loadable Modulue
NLSP 
NetWare Link Services Protocol
NNTP 
Network News Transfer Protocol
NOS 
Network Operating System
NT 
New Technology
NT1 
Network Terminator 1
NTFS 
New Technology File System
NTP 
Network Time Protocol

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O[edit]

OBI 
Open Buying on the Internet
ODBC 
Open Database Connectivity
OEM 
Original Equipment Manufacturer
OLAP 
Online Analytical Processing
OLTP 
Online Transition Processing
OODB 
Object-Oriented Database
ORB 
Object Request Broker
OS 
Operating Systems
OSI 
Open Systems Interconnect
OSPF 
Open Shortest Path First
OTDR 
Optical Time Domain Reflectometer
OTP 
Open Trading Protocol
OU 
Organizational Unit
OUI 
Organizationally Unique Identifier

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P[edit]

PAD 
Packet Assembler/Disassembler
PAP
Password Authentication Protocol
PBX 
Private Branch Exchange
PC 
Personal Computer
PCI 
Peripheral Component Interconnect
PCMC 
IA Personal Computer Memory Card International Association
PERL 
Practical Extraction and Report Language
PDC 
Primary Domain Controller
PDF 
Portable Document Format
PDL 
Page Description Language
PGP 
Pretty Good Privacy
PHP 
Hypertext Processing
PICS 
Platform for Internet Content Selection
PKI 
Public Key Infrastructure
PNG 
Portable Network Graphics
POP 
Post Office Protocol / Point of Presence
POP3 
Post Office Protocol version 3
POTS 
Plain Old Telephone Service
ppi 
Pixels Per Inch
PPP 
Point-to-Point Protocol
PPPoE 
Point-to-Point Protocol over Ethernet
PPTP 
Point-to-Point Tunneling Protocol
PRI 
Primary Rate Interface
PSTN 
Public Switched Telephone Network
PVC 
Permanent Virtual Circuit

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Q[edit]

QoS 
Quality of Service
QTVR 
QuickTime Virtual Reality

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R[edit]

RADIUS 
Remote Authentication Dial-In User Service
RAID 
Redundant Array of Independent Disks / Redundant Array of Inexpensive Disks
RAM 
Random Access Memory
RARP 
Reverse Address Resolution Protocol
RAS 
Remote Access Service
RDBMS 
Relational Database Management System
RDP 
Remote Desktop Protocol
RFC 
Request for Comment
RFI 
Radio Frequency Interface
RG 
Radio Grade
RIP 
Routing Information Protocol
RISC 
Reduced Instruction Set Computing
RJ 
Registered Jack
RMF 
Rich Music Format
RTF 
Rich Text Format
RTP 
Realtime Transport Protocol
RTSP 
Real Time Streaming Protocol

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S[edit]

S/MIME 
Secure Multipurpose Internet Mail Extensions
SAM 
Security Accounts Manager
SAPI 
Speech Application Programming Interface
SC 
Standard Connector / Subscriber Connector
SCP 
Secure Copy Protocol
SCSI 
Small Computer System Interface
SDH
Synchronous Digital Hierarchy
SDSL 
Single Line Digital Subscriber Line
SET 
Secure Electronic Transaction
SFF 
Small Form Factor
SFTP 
Secure File Transfer Protocol
SGML 
Standard Generalized Markup Language
SHA-1 
Secure Hash Algorithm 1
SLIP 
Serial Line Internet Protocol
SMAU 
Smart Multistation Access Unit
SMB 
Server Message Block
SMF 
Single Mode Fiber
SMS 
Storage Management Services
SMTP 
Simple Mail Transfer Protocol
SNMP 
Simple Network Management Protocol
SOA 
Start of Authority
SOHO 
Small Office / Home Office
SONET 
Synchronous Optical Network
SOP 
Standard Operating Procedures
SPARC 
Scalable Processor Architecture
SPS 
Standby Power Supply
SPX 
Sequence Packet Exchange
SQL 
Structured Query Language
SSH 
Secure Shell
SSI 
Server Side Include
SSID 
Service Set Identifier
SSL 
Secure Sockets Layer
ST 
Straight Tip
STP 
Shielded Twisted Pair
SVC 
Switched Virtual Circuit

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T[edit]

T1 
T-Carrier Level 1
TA 
Terminal Adapter
TCL 
Terminal Control Language / Tool Command Language
TCP 
Transmission Control Protocol
TCP/IP 
Transmission Control Protocol/Internet Protocol
TDM 
Time Division Multiplexing
TDR 
Time-Domain Reflectometer
TELNET 
Terminal Emulation for Networks
TFTP 
Trivial File Transfer Protocol
TIFF 
Tagged Image File Format
TM 
Trademark
TOS 
Type of Service
TP 
Transaction Processing
TTL 
Time to Live

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U[edit]

UDP 
User Datagram Protocol
UID 
User ID
UNC 
Universal Naming Convention
UPS 
Uninterruptible Power Supply
URL 
Uniform Resource Locator
USB 
Universal Serial Bus
USPTO 
United States Patent and Trademark Office
UTP 
Unshielded Twisted Pair
UUCP 
Unix to Unix Copy

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V[edit]

VAN 
Value Added Network
VB 
Visual Basic
VBI 
Vertical Banking Interval
VDSL 
Very High Data Rate Digital Subscriber Line
VLAN 
Virtual LAN
VoIP 
Voice Over IP
VPN 
Virtual Private Network
VRML 
Virtual Reality Modeling Language

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W[edit]

W3 
World Wide Web
W3C 
World Wide Web Consortium
WAN 
Wide Area Network
WAP 
Wireless Access Point / Wireless Application Protocol
WAV 
Wave File
WEP 
Wired Equivalent Privacy
WINS 
Windows Internet Naming Service
WinSock 
Windows Socket
WMA 
Windows Media Audio
WML 
Wireless Markup Language
WPA 
Wi-Fi Protected Access
VRML 
Virtual Reality Modeling Language
WSH 
Windows Script Host
WTS 
Windows Terminal Server
WWW 
World Wide Web

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X[edit]

XHTML 
Extensible TyperText Markup Language
XML 
Extensible Markup Language
XMS 
Extended Memory Services
XSL 
Extensible Style Language

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Y[edit]

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Z[edit]

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