<DD> -  DD tag defines a definition description.
    <dd>National Aeronautics and Space Administration</dd>
    <dd>Master of Business Administration</dd>

<Del> - DEL tag indicates <del></del>.The <del> tag defines text that has been deleted from a document.

<Dfn> - DFN tags emphasize definition, for example; <dfn>PC</dfn>: Personal Computer.

<Dir> - DIR tags define directory lists.for example:-


<Div> -  DIV tag is a logical section of a web document.for example:-
  <h1>Home Pets</h1>

<Dl> - DL tag defines a definition list.for example:-

    <dd>California State University</dd>
    <dd>United Nations</dd>

<Dt> - DT tags defines a definition term.
    <dd>HyperText Markup Language</dd>
    <dd>Cascading Style Sheets</dd>


Daily Budget – An amount set for each a d campaign to specify how much, on average, you’d like to spend each day. However, it is important to know that on single day, any you can receive up to 20% more in costs than your daily budget.

Damaged Device Fee - A fee that's applied when a device is returned as defective, but is found to have been misused, has liquid damage, hardware or software alterations or unreasonable wear and tear.

Dashboard Home - A feature on select devices that puts everything you care about on one screen, including the latest news, your social networking updates and updates from chosen apps like your calendar, email and more. When you swipe to Dashboard Home, the latest information is already waiting for you.

Data - Information sent or received from your mobile device other than calls and text messages. You may use data on your device when you access the Internet, check your email, play games, use apps (e.g., Facebook®, Twitter®, etc.) and more. Background tasks, such as syncing or location services, may also use data. Data usage is billed based on the amount of data sent and received (megabytes or gigabytes), and it can be charged per-use or as part of a data package. See also Data Usage.

Data Allowance - The amount of data that can be sent or received from your wireless device per month without incurring additional charges (as stated in your data package).

Data Detail - Total data usage (in kilobytes) sent and received in a given month. Data detail doesn’t itemize individual data sessions.

Data Encryption -  a means of scrambling the data so that it can only be read by the person(s) holding the ‘key’ – a password of some sort. Without the ‘key’, the cipher cannot be broken and the data remains secure. Using the key, the cipher is decrypted and the data is returned to its original value or state. Each time one wishes to encrypt data, a key from the 72,000,000,000,000,000 possible key variations is randomly generated and used to encrypt the data. The same key must be made known to the receiver if they are to decrypt the data.

Data Filters – A feature that allows users to select, sort and view only the information that is most important to them. This oftentimes makes large quantities of data become easier to digest.

Data mining-  when a computer program, with or without your prior consent, transfers information gleaned from your computer’s storage device (usually the hard disk drive) back to the data mining software’s originating company. The information usually references where you have surfed and what you were looking at while you were surfing. Such programs are also referred to as adware programs.

Data Package - A set amount of data that can be sent or received from your wireless device per month for a set charge rather than a per-usage fee.

Data Sense - A feature on wireless devices that monitors your data usage. Use it to create limits and manage how much data you use each month.

Data Session Call Waiting - A feature that has been added to all 1X-capable devices at Verizon Wireless. It allows you to receive your incoming voice calls even while you're engaged in an active data session. This feature already exists on Verizon Wireless EVDO-capable devices, but now it also will be functional when the user of an EVDO-capable device is engaged in an active 1X data session outside of the EVDO coverage area.

Data transfer -  the total size of files transferred by an account in a month. Sites with a lots of graphics, downloads, or streaming audio or video and a lot of visitors will require accounts with more available transfer. Data transfer may also mean the sending and the receiving of files using an Internet connection

Data Usage - The amount of data sent or received from your wireless device in a month.

Day Parting - Optimization technique where you adjust your ads to run during the most profitable hours and/or days. For example, if you run a call center that operates from 8-5, you can schedule ads to run during that timespan only.

DDA Demand Deposit Account - A bank account, such as a checking account, that allows the holder to withdraw funds or use funds for payment upon demand.

Deactivation - The permanent termination of wireless service. This is different from suspension of service, which is temporary. You may reactivate service within a certain period of time after a deactivation.

Deal - A unique trading arrangement between a buyer and seller in a confined, programmatic environment.

 Debit - The process of subtracting from the balance of an account.

 Debit Card - An ATM bankcard. This type of card allows a merchant to deduct money directly from a customer's bank account.

 Decrypt - The process of converting encrypted data or text back to plain data or text.

Default Max. CPC – Set at the ad group level, this represents the maximum amount you’re willing to pay for each ad click. If you don’t set a specific keyword bid, AdWords will apply your default max. CPC bid.

Defaults - Ad networks use this term to describe the ads served to fill unsold inventory space. These usually include lower-paying, non-paying or community service ads. Members of larger ad networks are usually offered a choice of defaults should they fail to sell all of their inventory.

Delivery medium - The manner in which an end-user is exposed to ad inventory, such as web or mobile.

Delphi Connect - A device that lets you monitor and locate your car, as well as troubleshoot its problems. The Delphi Connect with 4G LTE Mobile Hotspot also provides in-vehicle Wi-Fi connectivity for up to 5 devices.

Demand fusion - Allows OpenX to unite real-time bidding demand and ad network demand to come up with the best price for a publisher.

Demand partner - A company which purchases ad inventory on OpenX Ad Exchange.

 Denial - When permission to perform a particular action has been declined.

Depth of Field - Depth of Field (DOF) refers to the part of your image that is in focus. A deep DOF will show nearly everything in the frame sharply in focus. If you have a shallow DOF, a narrow range within your video image will be in focus. A shallow depth of field allows for greater emphasis to be placed on your main subject.

 DES - Data Encryption Standard

Destination URL – The URL address for the page you’re sending traffic to from your PPC ads.  This is allowed to be different from the display URL, although it has to direct users to the same domain as what is in the display URL.

Developer - An individual who writes computer programs to meet specific requirements. The term often implies involvement with, or responsibility for, requirements capture and testing.

Device ID - An identification number for your mobile device. MEID, ESN or IMEI can all be Device IDs, and your device may have more than one of them. A Device ID can be used to activate your device or deactivate it in the event that it's lost or stolen. Refer to your device's User Guide for information on how to locate your Device ID.

Device Installment Program - A payment plan that lets you purchase a new tablet or the Samsung Galaxy Camera™ and pay for it in 12 equal monthly installments. With this option, you can start using your tablet or camera right away with a lower upfront cost.

Device Payment - A program that provides you the flexibility to get the most current devices early or if you prefer, pay over 24 months rather than paying for it all upfront. You'll make a monthly payment until your device is paid off.

Devices – Electronics that are capable of displaying a PPC ad. Supported devices include desktops/laptops, mobile devices and tablets.

DHCP -  short for Dynamic Host Configuration Protocol. DHCP is a protocol for assigning a dynamic IP address to a device on a network. You would theoretically be assigned a different IP address every time you connect. The opposite of a DHCP provided IP address is a static IP address, which always remains the same regardless of how many times you connect.

DHTML (Dynamic  Hyper Text 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. 

DHTMLX - The DHTMLX suite (or dhtmlxSuite) is a JavaScript GUI widget library for building dynamic web applications with desktop-like user experience and Ajax data loading. The library is released under both open-source GNU General Public License and commercial licenses, and is developed by Dinamenta, UAB, headquartered in Vilnius, Lithuania.

Dial-up account - A dial-up account allows you to use your modem to make a connection to your provider’s system. Once you have dialed your provider’s local number and are connected, the provider then connects you directly to the Internet, where you can run any Internet navigation software (such as Internet Explorer).

Diegetic sound - Diegetic sound refers to the sound that is present and/or captured during the recording of the video.

Diffusion - Diffusion refers to material used on lights to reduce harsh shadows by softening light.

Digital Cash - Money, in the form of information, that can be stored in electronic wallets or on smart cards. Digital cash systems have been designed for use on the Internet for so-called "micropayments" - payments for goods that are too inexpensive to be paid for by credit cards.

 Digital Certificate - A digital certificate is a special kind of message that contains information about who it belongs to, who it was issued by, a unique serial number or other unique identification, valid dates, and an encrypted "fingerprint" that can be used to verify the contents of the certificate. Digital certificates are issued by trusted third parties, known as Certificate Authorities. The public key of the ecBuilder merchant's digital certificate is used to encrypt the shopper's order information before it is emailed to him.

Digital Good - A broad term to describe any good that is stored, delivered, and used in electronic format.

Digital Printing - Digital printing is a printing technique using digital or electronic files from a personal computer or other digital storage device as a source. Digital printing does not rely on a press plate to carry the image and also does not require any setup sheets. Due to lower production costs, digital printing has replaced lithography in a wide range of markets.

 Digital Signature - A way to ensure whether a message was actually sent by the person who claimed to have sent it. The sender's private key encrypts the signature, and the recipient decrypts the signature with the sender's public key. Digital signatures use public key cryptography and work in conjunction with certificates

Digital Wallet - A method of storing various forms of personal data (i.e., bank accounts, credit cards, driver’s license, other forms of ID) on a mobile or other electronic device to enable electronic commerce transactions quickly and securely.

Digital Zoom - A camera feature that makes the subject of the picture appear closer.\Dijit™An app that turns your device into a personal media assistant with content discovery, sharing and universal remote control capability. Use Dijit to access program and movie guides from all cable and satellite providers in North America.

Dijit™ - An app that turns your device into a personal media assistant with content discovery, sharing and universal remote control capability. Use Dijit to access program and movie guides from all cable and satellite providers in North America.

Dimensions Tab – Reporting section in Ad Words that allows advertisers to segment and view data based on a variety of criteria. For example, you can view aggregate data by destination URL, geographic location, hour of day, day of week and more.

Direct Carrier Billing - Also known as “direct operator billing” is the ability to purchase goods and services and have them charged directly to a user’s mobile bill or account.

Direct Sequence Spread Spectrum (DSSS) - DSSS is the modulation technique used by 802.11b networks to transmit data. It is resistant to interference, and permits sharing of a channel amongst multiple purposes, however it requires more bandwidth to transmit than the actual data being transmitted.

Direct sold - Inventory sold directly by the publisher to an advertiser, whereas remnant inventory is sold by a third party.

Direct Traffic - Visits to your site where the user types your URL into their browser's address bar or when a visitor uses a bookmark to get to your Website. It is important to know where your Website traffic is coming from so you can understand which marketing endeavors are working for you. Direct traffic illustrates how many of your visitors know your brand and Website URL. These visitors did not find your Website on search engines or on another site. They came directly to your Website.

Directories - Sites that list and link to other sites, including online stores, are referred to as directories.

DiscountCode - A series of numbers and/or letters that an online shopper may enter at checkout to get a discount or other special offer. Discount codes may also be called coupon codes.

Discount Rate - A percentage rate that is charged by the acquiring bank for processing a merchant's transaction. The type of business and/or how the credit card is processed usually determine this rate. Retail based transactions, also known as Card Present transactions are assigned lower discount rates than MO/TO, also known as Mail Order/Telephone Order, Internet, or Card Not Present transactions.

Display Ads - A type of advertising that typically contains text (i.e., copy), logos images, etc. Online, the advertising appears on web pages in many forms, including web banners.

Display Campaign Optimizer (DCO) – Tool that increases conversions by automatically managing, targeting and bidding for campaigns on the Google Display Network. Simply set a CPA target and Ad Words will do the rest. However, you must have enough historical conversion data in order to opt into this feature.

Display URL – The webpage address that is shown with your ad. This is often different from your destination URL and much shorter. Just make sure you only have one display URL per ad group and that it uses the same root domain as your destination URL.  AdWords allows 35 characters for Display URLs, and if your domain is longer than that they may show a shortened version.

Display/Content Bid – The maximum amount you’re willing to pay for an ad click on the Display Network.

Display/Content Network – A collection of more than a million websites, videos, and apps where your ads can appear.  Google’s network is called the Display Network, while Bing’s network of sites is called the Content Network.  In a lot of PPC circles, the terms are used interchangeably.

Distributor - A distribution business that inventories products from a number of manufacturers and sells to many retailers. Often distributors are able to offer shorter lead times than manufacturers and may sell in smaller quantities. It is common for distributors to charge a premium over a manufacturer-direct price for the service and convenience provided.

Diversity - Using multiple antennae to reduce interference and improve both transmission and reception of signals.

DLNA (Digital Living Network Alliance) - A technology standard that enables easy sharing of music, photos and videos between devices over an existing network, such as from your phone to your computer via Wi-Fi.

DLP (Digital Light Projection) - DLP (Digital Light Projection) is a type of projector technology that uses a Digital Micromirror Device (DMD). A DMD consists of thousands of tiny computer-controlled mirrors, that together with a fast-spinning Color Filter (or Color Wheel) forms a moving image.

DNS (Domain Name System) - The Domain Name System is the system that translates Internet domain names into IP numbers. A “DNS Server” is a server that performs this kind of translation.

Dojo Toolkit - Dojo Toolkit (stylized as dōjō toolkit) is an open source modular JavaScript library (or more specifically JavaScript toolkit) designed to ease the rapid development of cross-platform, JavaScript/Ajax-based applications and web sites. It was started by Alex Russell, Dylan Schiemann, David Schontzler, and others in 2004 and is dual-licensed under the modified BSD license or the Academic Free License (≥ 2.1). The Dojo Foundation is a non-profit organization created with the goal to promote the adoption of the toolkit.

Dolly – A Dolly is a piece of film equipment that runs on a track to create smooth camera movements..

Domain - The root address for a web page.

Domain Name -  The unique name that identifies an Internet site. Domain Names always have 2 or more parts, separated by dots. The part on the left is the most specific, and the part on the right is the most general. A given machine may have more than one Domain Name but a given Domain Name points to only one machine. 

Domestic Call - Any call made and received within the continental US.

Domestic Landline - Any non-wireless phone number within the US.

Dongle - In the mobile and payments space, used interchangeably as a magstripe reader when plugged in to the mobile device; in the technology space, it is a small piece of hardware that plugs into an electrical connector on a computer and serves as an electronic “key” for a piece of software; the program will run only when the dongle is plugged in.

Download - Transferring data (usually a file) from another computer to the computer your are using. The opposite of upload.

Dreamweaver  - Dreamweaver. Dreamweaver. A comprehensive Web site authoring program for Windows and Mac from Adobe. Dreamweaver enables the HTML programmer to build complex Web sites using HTML, JavaScript and server-side programming languages. It immediately renders the code in a design window.

Droid Command Center - A widget that gives you easy access to notifications for text messages, missed calls, battery level and weather. The Settings can also be quickly launched from this widget.

Droid Zap - An Android™ app that you can use to send your content to the cloud. Also, anyone nearby with a device running Android 2.2 or greater can download the media or file. If you want to limit who sees your content, you can add a code. Use this app to share the latest memories with your friends and family without physically connecting or touching your devices.

Dropped Call - A phone call that disconnects unexpectedly when neither caller intended for it to end.

Drop shipping - A fulfilment strategy wherein the retailer does not actually inventory the drop shipped product, but instead passes the shipping address to either the manufacturer, or a distributor that actually ships the purchased items directly to the customer. 

Dropped Call - A phone call that disconnects unexpectedly when neither caller intended for it to end.

 D-Shell Connector - A D-shell connector is mainly used in video connections. Its name comes from its shape, as it is roughly shaped like the letter D, and it finds various applications in RS-232 serialcommunications.A D-shell connector is also known as a D-subminiature connector or a D-sub connector.

DSL (Digital Subscriber Line) - A method for moving data over regular phone lines. A DSL circuit is much faster than a regular phone connection, and the wires coming into the subscriber’s premises are the same (copper) wires used for regular phone service. A DSL circuit must be configured to connect two specific locations, similar to a leased line, however, a DSL circuit is not a leased line. DSL is now a popular alternative to Leased Lines and ISDN (Integrated Services Digital Network), being faster than ISDN and less costly than traditional Leased Lines.

DSLR (Digital Single Lens Reflex)  - (Digital Single Lens Reflex) This is a type of camera that uses a mirror to reflect the light coming through the lens onto the viewfinder. When you press the shutter button on the camera, this mirror swings out of the way to allow light to reach the image sensor.

DSP - Demand-side platform, a platform or provider that allows advertisers to manage multiple ad exchange and data exchange accounts through one interface, often in real time.

D-Type Flip-Flop - A D-type flip-flop is a clocked flip-flop which has two stable states. A D-type flip-flop operates with a delay in input by one clock cycle. Thus, by cascading many D-type flip-flops delay circuits can be created, which are used in many applications such as in digital television systems.A D-type flip-flop is also known as a D flip-flop or delay flip-flop.

Dual Band - A feature on some mobile devices that allows the handset to operate using either the 800 MHz cellular or the 1900 MHz PCS frequencies.

Dual Mode - A feature on some mobile devices that allows the handset to operate on both analog and digital networks.

Dual Shot - A camera mode on select Samsung devices. It lets you use the front-facing and rear-facing cameras at the same time to capture 2 different perspectives. The picture taken with the front-facing camera will appear inside a box on top of the picture taken with the rear-facing camera.

Dual View - A feature on select devices that lets you open and use 2 apps on 1 screen at the same time.

DVI - DVI is the digital connector successor to VGA. DVI plugs are often colored white.

Dynamic Ad Targeting – Targeting method that matches relevant searches with ads generated directly from your website automatically.

Dynamic Ad Targeting – Targeting method that matches relevant searches with ads generated directly from your website automatically.

Dynamic IP address - an address that is assigned to a computer every time it connects to the Internet. A dynamic IP address should be different every time as it is assigned to the connection by the Inernet Service Provider’s DHCP server. The opposite of a dynamic IP address is the static IP address.

Dynamic Keyword Insertion (DKI) – Feature that allows users to dynamically customize an ad to include keywords contained in user search queries.

Dynamic range - Dynamic range is the range of which a camera can successfully capture the lightest and darkest areas of an image without losing detail.