Definitions: A

What is Above the Fold?
Above the fold is the top section of a Web page that is viewable without the user having to scroll down, or sideways.
What is Accessibility?
Accessibility is the state or quality of Web sites being accessible to users with disabilities.
What is an Acquirer?
An acquirer is a financial institution that maintains the merchant card processing services and receives transactions to be distributed to the card issuers for a merchant.
What is Ad Audience?
Ad audience is the number of unique users exposed to an ad within a specified time period.
What is an Ad Blocker?
An ad blocker is a software program on a userÂ’'s browser which prevents banner and interactive ads from being displayed.
What is Ad Centric Measurement?
Ad centric measurement is the audience measurement derived from a third party ad server's own server logs.
What is an Ad Impression/View?
An ad impression or ad view is a single display of an ad that is viewed by a Web user on a Web page, in a newsletter or e-mail.
What is an Ad Network?
An ad network is an online advertising agency that brokers ad impressions on behalf of the Web sites within its network.
What is an Ad Rotation?
An ad rotation is the number of banner ads that are rotated into an ad space on a Web site by software residing on a site's server, or a remotely hosted ad server facility.
What is Ad Space?
Ad space is the area on a Web page that is reserved for banner or text advertising.
What is Add URL/Site/Page?
Add URL (also known as 'Add Site' and 'Add Page') are links to webpages whereby you can submit your website for indexing in the site's search engine, or listing in the site's web directory.
What is an Adjustment?
An adjustment is a debit or credit to a credit card holder or merchant account to correct a transaction error.
What is an Affiliate?
An affiliate is typically a publisher or search marketer who is a member of an affiliate program or network.
What is an Affiliate Directory?
An affiliate directory is a categorized index of affiliate programs.
What is Affiliate Fraud?
Affiliate fraud is bogus or unlawful affiliate activity generated by an affiliate in an attempt to make money.
What is Affiliate Marketing?
Affiliate marketing is the use of affiliates to help market a Web site's products and services. Merchants typically pay a commission for each sale, lead, action, or visitor generated by the affiliate.
What is an Affiliate Network?
An affiliate network is an online advertising agency that connects merchants and affiliates. Affiliates are typically paid on a per click, per lead, per registration, or per sale basis.
What is an Affiliate/Associate Program?
An affiliate program (also known as an associate program) is a marketing concept whereby a web site sells its products and services with the help of affiliates or agents, usually other web sites. Affiliates are typically paid a commission for each sales referral.
What is Affiliate Software?
There are two types of affiliate software:
  1. A software program used by affiliate managers to track and report activity (clicks, leads, registration, sales) generated by its affiliates; and
  2. A software program used by affiliates to help them promote affiliate products.
What is AlltheWeb?
AlltheWeb is an Internet search engine that made its debut in mid-1999. It was used primarily as a showpiece site for FAST's enterprise search engine. Although at one time rivaling Google in size and technology, AlltheWeb never became as popular. Before their purchase by Yahoo!, the database contained about 3.3 billion webpages.
What are Alphanumeric Rankings?
Alphanumeric rankings are used by Web site directories to rank its listings in the order of the ASCII character set (punctuation marks, mathematical and other conventional symbols, numbers, then letters).
What is AltaVista?
AltaVista was once one of the most popular search engines on the Internet, but its popularity declined with the rise of Google. AltaVista claimed to be the first searchable full-text database of the World Wide Web back in December, 1995. AltaVista is now owned by Yahoo!.
What is Alternate Text?
Alternate text is the alternative text description of an image for users who disable image downloading in their browser. Also appears as a pop-up text message when a user moves their mouse over an image.
What is an Animated GIF?
An animated GIF is a GIF graphic that rotates through a series of static images to create the effect of animation.
What is an Anonymizer?
Anonymizer is an intermediary which prevent Web sites from seeing a userÂ’'s IP (Internet Protocol) address. Every computer connected to the Internet has an IP address.
What is Anonymous FTP (File Transfer Protocol)?
Anonymous FTP is a way of accessing another computer to upload or download files. Generally used to upload files to Web servers or for downloading applications.
What is Antialiasing?
Antialiasing is the smoothing of text, or an image, to remove rough sharp edges.
What is AOL Search?
AOL Search offers web results from Google, combined with multimedia and other content from AOL and various partners. Plus dedicated search tools for video, audio, images, maps, shopping, news and more.
What is Apache?
Apache is the name of the project team which created the Apache Web server, a freely available Web serving program.
What is an Applet?
An applet is a small programs embedded in a Web page that gives special functionality, usually written in Java.
What is ArchitextSpider?
ArchitextSpider is the name given to the Excite search engine spider, when it used to crawl the Web indexing Web pages.
What is an Archive?
An archive is a single file containing a collection of compressed, or zipped, files for efficient storage. To extract the original files from the compressed file, you use an unzipping program, such as PKZIP, StuffIt Expander, tar, and WinZip.
What is Ask an Expert?
Ask an expert web sites have experts in different fields offering answers to posted questions. While some ask an expert sites are free, others charge on a per question e-mailed, or per minute of advice given basis.
What is Ask Jeeves?
Ask Jeeves was the orginal name for Ask.com, where 'Jeeves' is the name of the 'gentleman's personal gentleman', or valet, fetching answers to any question asked. The character was based on Jeeves, Bertie Wooster's fictional valet from the works of P. G. Wodehouse. The original idea behind Ask Jeeves was to allow users to get answers to questions posed in everyday, natural language, as well as traditional keyword searching. The current Ask.com still supports this, with added support for math, dictionary, and conversion questions.
What is an ASP?
ASP is a company that offers individuals or enterprises access over the Internet to software applications and related services that would otherwise have to be located on their own personal or enterprise computers.
What is an Association?
Associations are organization which administers and promotes different types of credit cards that are licensing and regulatory agencies for bankcard activities.
What is an Attachment?
Attachments are computer files electronically attached to an e-mail and sent along with it.
What is Authorization?
Authorization is the approval of a credit card transaction by a card-issuing bank or approved service provider for a specific sum of money. The authorization indicates that the credit card holder has enough credit to be able to make the purchase.
What is an Autoresponder?
Autoresponders are computer programs that automatically return a pre-written e-mail message to anyone who sends e-mail to a particular Internet address.
What is AVS?
AVS is a service in which a merchant can verify a credit card holder's address with the Issuing Bank. Required by VISA for credit card processing over the Web.