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

A
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
 * AADS :Ameritech Advanced Data Systems

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 -
 * ACH :Automated Clearing House

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 -
 * ACL :Access Control List

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 -
 * AD :Active Directory

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 -
 * ADO :ActiveX Data Object

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 -
 * ADOdb :ActiveX Data Object Database


 * ADR :Advanced Data Recording

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 -
 * ADSL :Asymmetric Digital Subscriber Line

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 -
 * AFP :Apple File Protocol

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 -
 * AH :Authentication Header

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

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 -
 * AMI :Alternate Mark Inversion


 * ANS :Advanced Network Services

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 -
 * ANSI :American National Standards Institute

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 -
 * AP :Access Point

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 -
 * API :Application Program Interface

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 -
 * APIPA :Automatic Private IP Addressing

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 -
 * ARP :Address Resolution Protocol

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 -
 * ARPA :Advanced Research Projects Agency

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 -
 * ARPANET :Advanced Research Projects Agency Network

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 -
 * ASCII :American Standard Code for Information Interchange

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 -
 * ASF :Advanced Streaming Format

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 -
 * ASP :Active Server Pages / Application Service Provider

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 -
 * ATM :Asynchronous Transfer Mode


 * ATVEF :Advanced Television Enhancement Forum


 * AU :Unix Audio

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

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 -
 * AVI :Audio Visual Interleaved

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

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 -
 * B2E :Business to Employee

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 -
 * B2G :Business to Government

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 -
 * BASH :Bourne Again Shell

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 -
 * BDC :Backup Domain Controller


 * BERT :Bit-Error Rate Test

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 -
 * BGP :Border Gateway Protocol

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 -
 * BIND :Berkeley Internet Name Domain

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 -
 * BLOB :Binary Large Object

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 -
 * BMP :Bitmapped

The BNC connector is used for RF signal (typically pro-video) connections, both for analog and Serial Digital Interface video signals. - More from Wikipedia -
 * BNC :Bayonet Nut Connector / Bayonet Neill Concelman / British Naval Connector

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

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 -
 * BRI :Basic Rate Interface

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 -
 * BSD :Berkeley Software Distribution

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C
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 - 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 - 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 -
 * C2B :Consumer to Business
 * C2C :Consumer to Consumer
 * CA :Certification Authority

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 -
 * CAN :Campus Area Network


 * CAU :Controlled Access Unit

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 -
 * CDF :Channel Definition Format

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 -
 * CGI :Common Gateway Interface

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

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 -
 * CIDR :Classless Inter-Domain Routing

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 -
 * CIR :Committed Information Rate
 * CNAME :Canonical Name


 * CO :Central Office

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 - 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 -
 * CODEC :Compressor/Decompressor / Coder/Decoder
 * COM :Common Object Model

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 -
 * CORBA :Common Object Request Broker Architecture

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 - A central processing unit (CPU), or sometimes simply processor, is the component in a digital computer capable of executing a program. - More from Wikipedia - 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 - 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 -
 * CPAN :Comprehensive Perl Archive Network
 * CPU :Central Processing Unit
 * CRC :Cyclical Redundancy Check
 * CSMA/CA :Carrier Sense Multiple Access / Collision Avoidance

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 -
 * CSMA/CD :Carrier Sense Multiple Access / Collision Detection


 * CSNW :Client Services for NetWare

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 - In telecommunications, a channel service unit (CSU) is a line bridging device for use with T-carrier. - More from Wikipedia - 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 -
 * CSS :Cascading Style Sheet
 * CSU :Channel Service Unit
 * CSU/DSU :Channel Service Unit/Data Service Unit

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D

 * 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

 * 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

 * 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

 * 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

 * 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

 * 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

 * 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

 * Kbps: Kilobits per second

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L

 * 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

 * 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

 * 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

 * 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

 * 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

 * QoS :Quality of Service
 * QTVR :QuickTime Virtual Reality

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R

 * 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

 * 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

 * 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

 * 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

 * 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

 * 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

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

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Y
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Z
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