ISP - Internet Service Provider. A company which provides other companies or individuals with access to, or presence on, the Internet. Most ISPs are also Internet Access Providers -- extra services include help with design, creation and administration of WWW sites, etc.

Impression - The single display of a given banner advertisement to an individual web user.

Interactive television (ITV) - Interactive Television is television with interactive content and enhancements. Interactive television provides richer entertainment and more information about what is showing. Literally it combines traditional TV watching with the interactivity of the Internet and personal computer.

Java - A C-derived, object-oriented programming language invented by Sun Microsystems. Java is designed to run on any type of computer hardware through an intermediary layer called a virtual machine, which translates Java instructions into native code for that particular computer.

JavaScript - Small element of code embedded on web pages and executed by the browser when the page is viewed by a visitor.

Keyword - A keyword is a database index entry that identifies a specific record or document. Keyword searching is the most common form of text search on the web. Most search engines do their text query and retrieval using keywords. Unless the author of the web document specifies the keywords for her document (this is possible by using meta tags), it's up to the search engine to determine them. Essentially, this means that search engines pull out and index words that are believed to be significant. Words that are mentioned towards the top of a document and words that are repeated several times throughout the document are more likely to be deemed important.

Languages - This report details the primary language used by your visitors' browsers. Every time a page is requested from your site, it specifies a preferred language for the page. Understanding what languages your visitors use will help you customize content and to develop alternate pages for visitors who read different languages

Leakage - A type of dropout from customer engagement in the customer-centric framework that happens before any serious engagement with potential customers takes place. It represents customers whom you were able to acquire, but whom you were not able to convert.

Local Area Network - (LAN) A more-or-less self-contained network of interconnected computers (that may connect to the Internet), usually in a single office or building.

Log file - A file created by a web or proxy server which contains all of the access information regarding the activity on that server. Each line in a log file generated by web server software is a hit, or request for a file. Therefore, the number of lines in a log file will be equal to the number of hits in the file, not counting any field definitions line(s) that may be present.

Log Format - Every log file is written in a particular format,. The major access log types are NCSA Extended Combined, which is commonly used by Apache; and W3C, which is commonly used by Microsoft IIS.

Log Rotation - Log Rotation is the practice of renaming a log file, often by adding a date-stamp, and storing it somewhere. This is done concurrently with creating a new log file for the storage of website usage data. Most log rotation is done on a daily basis.

Meta Tag - A special HTML tag that provides information about a web page. Unlike normal HTML tags, meta tags do not affect how the page is displayed. Instead, they provide information such as who created the page, how often it is updated, what the page is about, and which keywords represent the page's content. Many search engines use this information when building their indices.