A wide area network (WAN) is a geographically dispersed network. The term distinguishes a broader structure from a local area network (LAN). It may refer to a series of networks linked to one another by permanent or transient telecommunication connections or simply to the ability of a network to talk to other public networks such as the Interent.WEB BROWSER A Program installed in your computer's memory that reads, or 'browses' Web pages. A full Internet connection is needed for them to browse the web. Internet Explorer and Netscape Navigator are the most popular Web browsers, now available in 'suites' along with many other essential Internet programs.

Webcasting (push technology) refers to the prearranged updating of news, weather, or any other selected information on a computer user'' desktop interface. This is achieved through periodic, and generally unobtrusive, transmission over the world Wide Web (which includes the use of the Web protocol on intranets).

A web crawler (also known as a web spider or web robot) is a program or automated script which browses the World Wide Web in a methodical, automated manner. Other less frequently used names for web crawlers are ants, automatic indexers, bots, and worms (Kobayashi and Takeda, 2000). This process is called web crawling or spidering. Many sites, in particular search engines, use spidering as a means of providing up-to-date data. Web crawlers are mainly used to create a copy of all the visited pages for later processing by a search engine that will index the downloaded pages to provide fast searches. Crawlers can also be used for automating maintenance tasks on a website, such as checking links or validating HTML code. Also, crawlers can be used to gather specific types of information from Web pages, such as harvesting e-mail addresses (usually for spam).

Presses which are fed by paper from a reel as distinct from separate sheets. They are normally used for low quality high run work.

A Web ring is a way of interlinking related Web sites so that you can visit each site one after the other, eventually (if you keep going) returning to the first web site.

The term web server can mean one of two things:
1. A computer program that is responsible for accepting HTTP requests from clients, which are known as web browsers, and serving them HTTP responses along with optional data contents, which usually are web pages such as HTML documents and linked objects (images, etc.).
2. A computer that runs a computer program which provides the functionality described in the first sense of the term.

Web space is the amount of space available for the construction of a web page. Pictures, text and everything else all take up a certain amount of room, so the more space you can get the better. Web space is measured in the form of Megabytes.

The World Wide Web is a collection of interconnecting webpages forming a global source of information for anyone who can get access to the Internet. There are billions of webpages available on every topic under the sun. A new, economical telephone line that gives you a 'permanent' link to the internet.

The World Wide Web Consortium was created in October 1994 to lead the World Wide Web to its full potential by developing common protocols that promote its evolution and ensure its interoperability. W3C has around 500 Member organisations from all over the world and has earned international recognition for its contributions to the growth of the Web.More Information.


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