Ad click rate
The percentage of ad views resulting in an ad click, sometimes referred to as the 'click-through rate' or 'click rate.'

Ad clicks
The number of times users click on an ad banner.

Ad pages sold
The number of page views an Internet company sells to advertisers. The percentage of the total available page views that are sold is referred to as the 'sell-through rate.'

Admin Screens
In order to manage your database driven site we create one or more administration modules. These are control panels that allow you to add, delete and edit the site content. Additional modules can be used to create new pages, sections or subsections.

Each function on the database requires one module. For instance edit content requires one module and add page requires another. Each module can also only relate to the same page structure with the same editable fields on the page. As most pages on a database driven site will be of the same structure - this isn't a problem. For instance a typical page could have a heading, a bold introductory subheading, main body text, links and an image. This would be a standard
layout throughout the site. However there may be other special pages such as links pages or contact pages that have a different structure and would therefore require a different module. If you are in any doubt, please contact us.


ADN -- (Advanced Digital Network)
Usually refers to a 56Kbps leased-line.

ADSL
Asymmetric digital subscriber line, a digital transmission technology that allows very fast connection to the Internet. It is described as asymmetric because the user is able to receive more data than they can send in a given period.

Ad views
The number of times an ad banner is downloaded and (presumably) seen by visitors. This statistic usually understates the number of actual ad impressions because of caching by browsers. This statistic corresponds to 'net impressions' in traditional media.

Applet
A small Java program that can be embedded in an HTML page. Applets differ from full-fledged Java applications in that they are not allowed to access certain resources on the local computer, such as files and serial devices (modems, printers, etc.), and are prohibited from communicating with most other computers across a network. The common rule is that an applet can only make an Internet connection to the computer from which the applet was sent.

Archie
A tool (software) for finding files stored on anonymous FTP sites. You need to know the exact file name or a substring of it. By 1999 Archie had been almost completely replaced by web-based search engines. Back when FTP was the main way people moved files over the Internet archie was quite popular.
See also: FTP

ARPANet -- (Advanced Research Projects Agency Network)
The precursor to the Internet. Developed in the late 60's and early 70's by the US Department of Defence as an experiment in wide-area-networking to connect together computers that were each running a different system so that people at one location could use computing resources from another location.

ASCII -- (American Standard Code for Information Interchange)
This is the defacto world-wide standard for the code numbers used by computers to represent all the upper and lower-case Latin letters, numbers, punctuation, etc. There are 128 standard ASCII codes each of which can be represented by a 7 digit binary number: 0000000 through 1111111.