World Wide Web

"The Web" and "WWW" redirect here.

WWW's historical logo designed by Robert Cailliau

The world wide web ("www" or simply the "web") is a global collection of information presented in the form of documents hosted on networked computers and available to the public. The information includes text files, images, videos, sound files and many other types of information. The documents containing information are delivered to individuals over a global computer network called the internet.

The internet is the network of computer networks used as transport mechanism for documents. After connecting to the internet, people can browse the web by running a web browser on their local computer and using the web browser to surf (move around at will) through the vast array of available web documents. Connecting to the internet also enables people to use many other services which are not necessarily considered to be part of the world wide web, such as e-mail, instant messaging or digital telephony.

Web technical specifications

The world wide web is implemented by software which adheres at least to the following three standards:

• the Uniform Resource Identifier (URI), which is a universal system for referencing resources on the Web, such as Web pages;
• the HyperText Transfer Protocol (HTTP), which specifies how the browser and server communicate with each other
• the HyperText Markup Language (HTML), used to define the structure and content of hypertext documents.

Origins

The primary author and first implementer the above standards was Tim Berners-Lee of CERN. The internet had existed in some form for perhaps twenty years before this--and it had grown--but the means of sharing information over the internet were neither available to large numbers of people, nor friendly enough to accomodate non-technical users. Berners-Lee's technical guidance provided opportunity for information to be shared easily to a non-technical audience.

Berners-Lee devised the first web browser to fetch and display documents containing hyperlinks, which when clicked brought down additional documents over the internet. The idea took off very quickly, and an entire economy grew up around the demand for both internet access and web browsers.

Equally important with his technical expertise was Berners-Lee's vision that the internet should remain a free service available to anyone. The web made its debut as a publically available service on August 6, 1991.. On April 30, 1993, CERN announced that the World Wide Web would be free to anyone. This came two months after the announcement that gopher, the older distributed document protocol, was no longer free to use. In the intervening years, the world wide web has managed to survived in a low-cost form available to large numbers of people, but not without considerable social struggle to keep it so. Multiple attempts have been made (and likely will be made again) to tax commerce performed through the web, or to censor its content (in fact, some countries do attempt to censor information flow from the web, with varied degrees of success).

The World Wide Web began an astronomical growth in popularity after the 1993 release of the graphical Mosaic web browser by the National Center for Supercomputing Applications (NCSA) developed by Marc Andreessen. Prior to the release of Mosaic, graphics were not commonly mixed with text in Web pages and its popularity was less than older protocols in use over the internet, such as Gopher protocol and Wide area information server. Mosaic's graphical user interface allowed the Web to become by far the most popular internet protocol.

Content

The Web is available to individuals outside mass media. In order to "publish" a web page, one does not have to go through a publisher or other media institution, and potential readers could be found in all corners of the globe. The increased opportunity to publish materials is certainly observable in the countless personal pages, as well as pages by families, small shops, etc., facilitated by the emergence of free web hosting services. It's free to post some smaller webpages, and even larger sites are inexpensive in comparison to traditional media.

Unlike books and documents, hypertext does not have a linear order from beginning to end. It is not broken down into the hierarchy of chapters, sections, subsections, etc. This allows readers to easily find more on a topic, move to other related topics, or skip sections they're uninterested in.

Many different kinds of information are now available on the Web, and for those who wish to know other societies, their cultures and peoples, it has become easier. When travelling in a foreign country or a remote town, one might be able to find some information about the place on the Web, especially if the place is in one of the developed countries. Local newspapers, government publications, and other materials are easier to access, and therefore the variety of information obtainable with the same effort may be said to have increased, for the users of the internet.

Although some websites are available in multiple languages, many are in the local language only. Also, not all software supports all special characters, and RTL languages. These factors would challenge the notion that the World Wide Web will bring a unity to the world.

Sociological implications

The Web, as it stands today, has allowed global interpersonal exchange on a scale unprecedented in human history. People separated by vast distances, or even large amounts of time, can use the Web to exchange — or even mutually develop — their most intimate and extensive thoughts, or alternately their most casual attitudes and spirits. Emotional experiences, political ideas, cultural customs, musical idioms, business advice, artwork, photographs, literature, can all be shared and disseminated digitally with less individual investment than ever before in human history. Although the existence and use of the Web relies upon material technology, which comes with its own disadvantages, its information does not use physical resources in the way that libraries or the printing press have. Therefore, propagation of information via the Web (via the internet, in turn) is not constrained by movement of physical volumes, or by manual or material copying of information. And by virtue of being digital, the information of the Web can be searched more easily and efficiently than any library or physical volume, and vastly more quickly than a person could retrieve information about the world by way of physical travel or by way of mail, telephone, telegraph, or any other communicative medium.

The Web is the most far-reaching and extensive medium of personal exchange to appear on Earth. It has probably allowed many of its users to interact with many more groups of people, dispersed around the planet in time and space, than is possible when limited by physical contact or even when limited by every other existing medium of communication combined.

Because the Web is global in scale, some have suggested that it will nurture mutual understanding on a global scale. By definition or by necessity, the Web has such a massive potential for social exchange, it has the potential to nurture empathy and symbiosis, but it also has the potential to incite belligerence on a global scale, or even to empower demagogues and repressive regimes in ways that were historically impossible to achieve.

See also

• Deep web
• First image on the Web
• Search engine
• Streaming media
• Web directory

External links

• Berners-Lee, Tim; Bray, Tim; Connolly, Dan; Cotton, Paul; Fielding, Roy; Jeckle, Mario; Lilley, Chris; Mendelsohn, Noah; Orchard, David; Walsh, Norman; Williams, Stuart (December 15, 2004). Architecture of the World Wide Web, Volume One. Version 20041215. W3C.
• Halsall, Fred [1985] (2005). Computer Networking and the Internet, fifth edition. Pearson Education. ISBN 0-321-26358-8. 
• Fielding, R.; Gettys, J.; Mogul, J.; Frystyk, H.; Masinter, L.; Leach, P.; Berners-Lee, T. (June 1999). Hypertext Transfer Protocol — HTTP/1.1. Request For Comments 2616. Information Sciences Institute.
• Polo, Luciano (2003). World Wide Web Technology Architecture: A Conceptual Analysis. New Devices. Retrieved on July 31, 2005.
• Open Directory — Computers: Internet: Web Design and Development
• WWW-Virtual Library: History of the Internet & W3
• Early archive of the first web site
• Internet Statistics: Growth and Usage of the Web and the Internet
• The History of the Web
• Webology
• The World Wide Web Virtual Library: Web Site Tools from the World Wide Web Virtual Library
• A comprehensive history with people, concepts and many interesting quotations
• Article DirectorySome articles about World Wide Web