Glossary from My Workside – My Compilation

In my work-area, I have used the following terms. It was updated finally by Aug, 2012 and it is yet to be updated as per latest technology and trends. The same is available as a PDF file in the following link and can be opened and saved in your PC for your perusal.

Glossary of Terms in IT and Telecom

Any suggestions are verified, accepted and updated.

	Address (Example)	:		http:\\www.Someones.homepage/default.html
	Address (Example)	:		ftp://ftp.server.somewhere/ftp.file
	CGI	:		Common Gateway Interface
D	DDLC			Document Development Life Cycle
D	DITA	:		Darwin Information Typing Architecture is an XML-based format
D	RFI/RFP			Request for Information / Request for Proposal
D	RFP			Request For Proposal
D	SDLC			Software Development Cycle
D	SME			Subject Matter Expert
G	1Hz	:		Hertz   Ref. Kbase Comm. File for Hz Measurement
G	2KHz	:		Kilo Hertz
G	3MHz	:		Mega Hertz
G	4GHz	:		Giga Hertz
G	5THz	:		Tera Hertz
G	6pHz	:		Pico Hertz
G	7PHz	:		Peta Hertz
G	8EHz	:		Exa Hertz
G	APA	:		American Psychological Association
G	BIOS	:		Basic Input/Output System, Binary Input/Output System, Basic Integrated Operating System, & Built In Operating System
G	CMOS	:		Complementary Metal Oxide Semi-conductor
G	GIMP			GNU Image Manipulation Program
G	IEEE	:		Institute of Electrical and Electronics Engineers,
G	LHC			Large Hadron Collider  (CERN- European Organization for Nuclear Research (French: Organisation européenne pour la recherche nucléaire))
G	MLA	:		Modern Language Association
G	SVG	:		Scalable Vector Graphics
G	U	:		U is the standard unit of measure for designating the vertical usable space, or height of racks (metal frame designed to hold hardware devices) and cabinets (enclosures with one or more doors). This unit of measurement refers to the space between shelves on a rack. 1U is equal to 1.75 inches. For example, a rack designated as 20U, has 20 rack spaces for equipment and has 35 (20 x 1.75.) inches of vertical usable space. Rack and cabinet spaces and the equipment which fit into them are all measured in U.
G	VRLA	:		Valve Regulated Lead-Acid
I	AIDC	:		. Automatic Identification and Data Capture
I	AJAX	:		Asynchronous JavaScript and XML
I	API	:		Application Programming Interface
I	ASP	:		Active Server Pages
I	BBS	:		Bulletin Board System – A computerized meeting and announcement system that allows people to carry on discussions, upload and download files, and make announcements without the people being connected to the computer at the same time. In the early 1990’s there were many thousands (millions?) of BBS’s around the world, most are very small, running on a single IBM clone PC with 1 or 2 phone lines. Some are very large and the line between a BBS and a system like AOL gets crossed at some point, but it is not clearly drawn.
I	Binary	:		Information consisting entirely of 1s and 0s. Also, commonly used to refer to files that are not simply text files, e.g. images.
I	Bit	:		Binary DigIT – A single digit number in base-2, in other words, either a 1 or a zero. The smallest unit of computerized data. Bandwidth is usually measured in bits-per-second.
I	bookmark	:		Also called a hot-list entry or favorite place, a saved link to a Web address.
I	browser	:		A program, such as a Web browser, that connects to a centralised server program and obtains information from it.
I	CHM	:		Compiled Windows HTML Help files
I	client/server model	:		A method of sharing computer and network resources by centralizing some functions with a server and allowing individual clients to connect to the server to perform those functions.
I	Cookie	:		The most common meaning of “Cookie” on the Internet refers to a piece of information sent by a Web Server to a Web Browser that the Browser software is expected to save and to send back to the Server whenever the browser makes additional requests from the Server.
I	CSS	:		Cascading Style Sheet – A standard for specifying the appearance of text and other elements. CSS was developed for use with HTML in Web pages but is also used in other situations, notably in applications built using XPFE. CSS is typically used to provide a single “library” of styles that are used over and over throughout a large number of related documents, as in a web site. A CSS file might specify that all numbered lists are to appear in italics. By changing that single specification the look of a large number of documents can be easily changed.
I	Cyberspace	:		Term originated by author William Gibson in his novel Neuromancer the word Cyberspace is currently used to describe the whole range of information resources available through computer networks.
I	DDR SDRAM	:		Double-Data-Rate Synchronous Dynamic Random Access Memory is a class of memory integrated circuit used in computers defined by Joint Electron Device Engineering Council (JEDEC)
I	DHCP	:		Dynamic Host Control Protocol (Protocol for the allocation and delivery of network IP Addresses to entities on an IP Network)
I	DHTML	:		Dynamic HyperText Markup Language – DHTML refers to web pages that use a combination of HTML, JavaScript, and CSS to create features such as letting the user drag items around on the web page, some simple kinds of animation, and many more.
I	DNS	:		Domain Name System
I	DOM	:		Document Object Model
I	Download	:		Transferring data (usually a file) from a any computer to the computer your are using. The opposite of upload.
I	DPC	:	Dynamic Power Control
I	DSR	:	Digital Standard Run-off
I	DTD	:	Document Type Definition
I	DVD	:	Digital Video Disc
I	EAN / UCC	:	European Article Numbering / Uniform Code Council
I	Email	:	Electronic Mail – Messages, usually text, sent from one person to another using & through computer.
I	Ethernet	:	A very common method of networking computers in a LAN.
I	Extranet	:	An intranet that is accessible to computers that are not physically part of a company’s own private network, but that is not accessible to the general public, for example to allow vendors and business partners to access a company web site.Often an intranet will make use of a Virtual Private Network. (VPN.)
I	FAT	:	File Allocation Table
I	FH	:	Frequency Hopping
I	ftp	:	File Transfer Protocol (ftp://xxx.xxx.xx.xx )
I	GPU	:	Graphics Processing Unit
I	GUI	:	Graphical User Interface
I	home page	:	A major or central document at a World Wide Web site.
I	html	:	Hyper Text Markup Language
I	http	:	Hyper Text Transfer Protocol (http://www.  )
I	HWFL	:	Hardware Fractional Loading
I	hyper	:	Nonlinear, capable of branching off in many directions. (Can be used alone or as a prefix.)
I	Hyperlinks	:	A tool provided by the Web protocol to link text or picture from one file location to other file.
I	IC	:	Interference Cancellation
I	ICANN	:	Internet Corporation for Assigned Names and Numbers
I	ICMP	:	Internet Control Message Protocol
I	IDE	:	Integrated Drive Electronics (ATA/66 Cable )
I	IIS	:	Internet Information Services
I	image map	:	A Click-able image that connects to different URLs depending on which part of the image is clicked.
I	IMAP	:	Internet Message Access Protocol
I	Information Superhighway, Infoway, Infobahn, Info Highway, etc.	:	The terms correspond to nothing in the real world. The Internet is not a superhighway. The terms were coined to describe a possible information infrastructure, using coaxial or fibre-optic cables, which would upgrade the existing system.
I	Internet	:	Worldwide network of thousands of computer / computer networks and millions of Commercial, Educational, Government and Personal Computers. Internet is an electronic city with virtual Libraries, Storefronts, Business offices, Art Galleries and so on. Tim Berners Lee and Robert Cailiau – inventers of Internet.
I	Intranet	:	A network within organizations that uses Internet technologies (such as HTTP or FTP protocols). We can use intranet to move between Objects, Documents Pages and other destinations using hyperlinks.
I	IP	:	Internet Protocol
I	ISP	:	Internet Service Provider
I	JPEG	:	Joint Photographic Experts Group
I	LASER	:	Light Amplification by Simulated Emission of Radiation
I	LDAP	:	Lightweight Directory Access Protocol (®IMAP, SNMP, NNTP, POP3, HTTP, COM )
I	LDIF	:	LDAP Data Interchange Format
I	link	:	A specially designated word or image that, when selected, takes a Web browser to new page or other destination (an embedded Web address).
I	LMDS	:	Local Multi-point Distribution Service
I	MAC	:	Media Access Control
I	MAPI	:	Messaging Application Programming Interface
I	MCVD	:	Modified Chemical Vapor Deposition
I	MIME	:	Multipurpose Internet Mail Extensions
I	MOS	:	Mean Opinion Score
I	MSI	:	Microsoft Windows Installer (format)
I	Multimedia	:	Incorporating many different media, often-including text, pictures, sounds, video, animations, and so on.
I	MVA	:	Multi-domain Vertical Alignment
I	Net	:	A loosely defined term meant to suggest the loose association of all or most computers on the planet. Generally refers to a more inclusive set of linked networks than just the Internet, but also corresponds roughly to the Internet.
I	NLE	:	NLE Mode – Non Linear Editing
I	NLOS	:	Non Line Of Sight
I	NTFS	:	N T File System (Windows N T Operating System (OS) )
I	OEM	:	Original Equipment Manufacturer
I	page	:	On the World Wide Web, and HTML document.
I	PCMCIA	:	Personal Computer Memory Card International Association
I	PHP	:	Hypertext PreProcessor
I	Pixel	:	Picture Element (640×480; 800×600; 1024×768; 1152×864; 1280×720 . . .)
I	PNCP	:	Point and Click Provisioning
I	PNG	:	Portable Network Graphics
I	PnP	:	Plug and Play
I	PPP	:	Point-to-Point Protocol
I	RAVE	:	Real Animated Vector Effects
I	RSS	:	Really Simple Syndication / Rich Site Summary / Rockdale, Sandow, and Southern (Railroad)
I	SAPI	:	Server Application Programming InterfaceISAPI – Internet Server Application Programming Interface
I	SATA	:	Serial Advanced Technology Attachment (other one is PATA – Parallel ATA)
I	SD & DD RAM		SDR and DDR stand for Single Data Rate and Double Data Rate (Random Access Memory)
I	server	:	A piece of software or machine that acts as a centralized source of information or computing resources (such as Web sites, Gopher menus, FTP achieves, and so on), available to clients.
I	SGML	:	Standard Generalized Markup Language
I	SHDSL	:	Single-line High-speed Digital Subscriber Line
I	Site	:	A location on Internet, often the host of one or more servers, or a set of related Web pages, also sometimes called a web space.
I	SLAT	:	Second Level Address Translation
I	SLI	:	Scalable Link Interface
I	SMPS	:	Switch Mode Power Supply
I	SMTP	:	Simple Mail Transfer Protocol
I	SNMP	:	Simple Network Management Protocol
I	SOAP	:	Simple Object Access Protocol
I	SO-DIMM	:	Small Outline Dual In-Line Memory Module
I	SPVA	:	Super Patterned Vertical Alignment
I	SWF	:	Shock Wave Format (Macromedia Flash File Format)
I	TCP	:	Transmission Control Protocol
I	TFT	:	Thin Film Transister
I	TN	:	TN+Film Twisted Nematic
I	UML	:	Unified Modeling Language
I	UMPC	:	Ultra Mobile PC
I	URL	:	Universal Resource Locator
I	USO	:	Universal Services Obligation
I	VCR	:	Video Cassette Recorder
I	VHS	:	Video Home System
I	Web	:	The World Wide Web
I	Web-Browser	:	Software that interprets the markup of HTML files posted on the WWW, formats them into Web pages and displays them to the user. Some Browsers can also open special programs to play sound or video files in web documents, if you have the necessary hardware.
I	WEP	:	Wired Equivalency Privacy
I	WPA	:	WiFi Protected Access
I	WWW	:	World Wide Web is also called as ‘W3C’,  a system for exploring the Internet by using hyperlinks. When you use a Web browser, the web appears as a collection of Text, Pictures, Sounds and Digital Movies.
I	XML / XSL	:	Extensible Stylesheet Language
I	XPS	:	XML Paper Specifications (Microsoft Windows –Vista)
T	10 Base-T	:	An Institute of Electrical & Electronic Engineers (IEEE 802.3) specification for 10Mbit/s CSMA/CD base band local area networking (LAN) transmission commonly called Ethernet over twisted-pair wiring.
T	1xEV-DO	:	1X Evolution Data Optimized
T	1xEV-DV	:	1X Evolution Data and Voice
T	30 – 300 MHz	:	Very High Frequency (VHF) ()
T	300 – 3000 MHz	:	Ultra High Frequency (UHF)
T	3G	:	Third Generation (Wideband Code Division Multiple Access (WCDMA is the 3G technology choice)
T	4GV	:	4G Vocoder
T	AAC	:	Advanced Audio Coding
T	ADPCM	:	Adaptive Differential Pulse Code Modulation
T	AMA	:	Automatic Message Accounting
T	AMR	:	Adaptive Multi Rate
T	ARPANET	:	Advanced Research Projects Agency Network
T	ARPU	:	Average Revenue Per User
T	ATM	:	Asynchronous Transport Module
T	BGAN	:	Broadband Geographical Area Network
T	BNC	:	Bayonet Neill-Concelman
T	B-RAS	:	Broadband Access Systems
T	BREW	:	Binary Run time Environment for Wireless (BDS-BREW Distribution System)
T	BTS	:	Base Station Transceiver
T	BWA	:	Broadband Wireless Access
T	CCITT	:	Comité Consultif International de Telegraphique et Teleponique
T	CDMA	:	Code Division Multiple Access
T	CDMA2000	:	Third Generation CDMA2000 System
T	CLI	:	Call Level Interface
T	CNR	:	Carrier-to-Noise Ratio
T	Code Limit	:	UMTS has only 256 orthogonal codes per sector in 5 MHz
T	CS1 – CS4	:	GPRS Modulation Schemes
T	CSMA/CA		Carrier Sense Multiple Access/Collision Avoidance (by Macintosh)
T	CSMA/CD	:	Carrier Sense Multiple Access/Collision Detection)
T	CSO	:	Composite Second Order distortion
T	CT-2	:	Cordless Telephony-2
T	CWDM	:	Coarse Wave Division Multiplexing
T	DAMA	:	Demand Assigned Multiple Access
T	D-AMPS	:	Digital Advanced Mobile Phone Service
T	DECT	:	Digital Enhanced Cordless Telecommunications
T	DLC	:	Digital Loop Carrier
T	DMB	:	Digital Multimedia Broadcasting
T	DSCH	:	Downlink Shared Channel
T	DSL	:	Digital Subscriber Line
T	DSLAM	:	Digital Subscriber Line Access Multiplexers
T	DSSS	:	Direct Sequence Spread Spectrum
T	DTMF	:	Dual-tone Multi-Frequency
T	DTX	:	Discontinuous Transmission
T	DVB	:	Digital Video Broadcasting
T	DWDM	:	Dense Wave Division Multiplexing
T	EDGE	:	Enhanced Data-rates for GSM Evolution
T	EED	:	Electro Explosive Device
T	EFR	:	Enhanced Full Rate Vocoder
T	EGPRS	:	Enhanced GPRS (General Packet Radio Service)
T	EMS	:	Enhanced Messaging Services
T	ESN	:	Electronic Serial Number
T	ETSI	:	European Telecommunications Standards Institute
T	EVDO	:	Evolution, Data Only or Evolution, Data Optimized. Official name is CDMA2000 defined by Telecom Industry Association. EVDO is known as EV-DO, 1xEvDO and 1x EV-DO is a standard for a High-Speed Wireless Broadband.
T	EVDV	:	EVolution for Data and Voice
T	EVRC	:	Enhanced Variable Rate Coder
T	EWSD	:	Electronic Worldwide Switch Digital, or, in German, Elektronisches WaehlSystem Digital
T	FDD	:	Frequency Division Duplexing
T	FDDI	:	Fiber Distributed Data Interface
T	FDM	:	Frequency Division Multiplexing
T	FTTx	:	Fiber to the Something (such as Home, Premises, Building, Business, Curb, Node) – or FTTx.
T	FWA	:	Fixed Wireless Access
T	FWT	:	Fixed Wireless Terminal
T	GMSK	:	Gaussian Minimum Shift Keying
T	GPRS	:	General Packet Radio Service
T	GPS	:	Global Positioning System
T	GSM	:	Global System for Mobile communications (Global System of Messaging)
T	HDSL	:	High-Bit-Rate Digital Subscriber Line
T	HSCSD	:	High Speed Circuit Switched Data
T	HSDPA	:	High Speed Downlink Packet Access
T	IMSI	:	International Mobile Subscriber Identity
T	INMARSAT	:	INternational MARitime SATellite
T	IPDSLAM	:	Internet Protocol Digital Subscriber Line Access Multiplexers
T	IS	:	Interim Standard
T	ISDN	:	Integrated Services Digital Network
T	ITU	:	International Telecommunications Union
T	IVD	:	Inside Vapor Deposition
T	LEC	:	Local Exchange Carrier
T	LOS	:	Line Of Sight
T	MBMS	:	Multimedia Broadcast and Multicast Services
T	MCPC	:	Multiple Channel Per Carrier
T	MFD	:	Mode-Field Diameter
T	MIB	:	Management Information Base
T	MMDS	:	Multi-channel Multi-point Distribution Service
T	MMS	:	Multimedia Messaging Service
T	MS	:	Mobile Station
T	MTBF	:	Mean Time Between Failures
T	NZ-DSF	:	Non-Zero Dispersion Shifted Fiber
T	OFDM	:	Orthogonal Frequency-Division Multiplexing
T	OSI	:	Open System Interconnection
T	OTD	:	Orthogonal Transmit Diversity
T	P2P	:	Peer-to-Peer
T	PCS	:	Personal Communication Service
T	PDA	:	Personal Digital Assistant
T	PDH	:	Plesiochronous Digital Hierarchy
T	PHS	:	Portable Handy phone System
T	POP3	:	Post Office Protocol Version 3
T	PSP	:	Play Station Portable
T	PTT	:	Push To Talk
T	QCELP	:	Qualcomm Code Excited Linear Prediction
T	Rel. A	:	Release A of CDMA2000 1X
T	RF	:	Radio Frequency
T	RJ45	:	Registered Jack 45
T	RPR	:	Resilient Packet Ring
T	RUIM	:	Removable User Identity Module
T	RxD	:	Receive Diversity
T	SAIC	:	Single Antenna Interference Cancellation
T	SCDMA	:	Synchronous Code Division Multiple Access
T	SCPC	:	Single Channel Per Carrier
T	SCSI	:	Small Computer System Interface
T	SDCA	:	Short Distance Charging Area
T	SDH	:	Synchronous Digital Hierarchy (SDH)
T	SHDSL	:	Symmetric High-speed Digital Subscriber Line
T	SHF	:	Super High Frequency
T	SIM	:	Subscriber Identity Module.
T	SMS	:	Short Messaging Service
T	SMV	:	Selectable Mode Vocoder
T	SNCP	:	Single Node Control Point
T	SOHO	:	Small Office Home Office
T	SONET	:	Synchronous Optical NETwork
T	SSA	:	Secondary Switching Area
T	SSPA	:	Solid State Power Amplifier
T	STM	:	Synchronous Transport Module
T	STS	:	Space Time Spreading
T	T1	:	A specification for a transmission line, details the input and output characteristics and the bandwidth. T1 lines run at 1.544Mbit/s and provide for 24 data channels. In common usage, the term ‘T1’ is used interchangeably with ‘DS-1.’
T	TCP	:	Transmission Control Protocol
T	TD	:	Transmit Diversity
T	TDMA	:	Time Division Multiple Access
T	UDP	:	User Datagram Protocol
T	UMTS	:	Universal Mobile Telecommunications System (3 G in Europe)
T	UTRA	:	UMTS/Universal Terrestrial Radio Access
T	UTRAN	:	UTRA Network
T	VDSL	:	Very high bit-rate Digital Subscriber Line
T	VOD	:	Voice On Demand
T	VPN	:	Virtual Private Network
T	VSAT	:	Very Small Aperture Terminal
T	WAP	:	Wireless Application Protocol
T	W-CDMA	:	Wideband Code Division Multiple Access
T	WDM	:	Wave Division Multiplexing
T	WiMAX	:	Worldwide Interoperability for Microwave Access
T	WLL	:	Wireless in Local Loop
T-Cards	ADSL	:	Asynchronous Digital Subscriber Line
T-Cards	BRI	:	Basic Rate Interface
T-Cards	E1	:	Basic primary multiplexer 2.048Mb/s trunks were joined together by adding bits (bit stuffing), which synchronized the trunks at each level of the PDH. 2.048Mb/s was called E1 and the hierarchy is based on multiples of 4 E1s.
T-Cards	FXS	:	Foreign Exchange Subscriber
T-Cards	HDLC	:	High Level Data Link Control
T-Cards	POTS	:	Plain Old Telephone Service
T-Cards	PRI	:	Primary Rate Interface (ISDN)
T-Cards	PSTN	:	Public Switched Telephone Network
T-Cards	PSU	:	Power Supply Unit
T-Cards	SCM	:	System Control Module
T-Cards	STM	:	Synchronous Transfer Mode
TW		:
TW	IFB	:	Invitation for Bid
TW	ITQ	:	Invitation to Quote
TW	RFI	:	Request for Information (Interest)
TW	RFP	:	Request for Proposals
TW	RFQ	:	Request for Quote (Quotation)
TW	SME	:	Subject Matter Experts