Search

The Online Encyclopedia and Dictionary

 
     
 

Encyclopedia

Dictionary

Quotes

   
 

World Wide Web

(Redirected from WWW)


The World Wide Web ("WWW", or simply "Web") is an information space in which the items of interest, referred to as resources, are identified by global identifiers called Uniform Resource Identifiers (URI).

Contents

Basic terms

Hypertext is viewed using a program called a web browser which retrieves pieces of information, called "documents" or "web pages", from web servers and displays them, typically on a computer monitor. One can then follow hyperlinks on each page to other documents or even send information back to the server to interact with it. The act of following hyperlinks is often called "surfing" or "browsing" the web. Web pages are often arranged in collections of related material called "web sites."

Although the English word worldwide is normally written as one word (without a space or hyphen), the proper name World Wide Web and abbreviation WWW are now well-established even in formal English. The earliest references to the Web called it the WorldWideWeb (an example of computer programmers' fondness for intercaps) or the World-Wide Web (with a hyphen, this version of the name is the closest to normal English usage).

Origins

See also: History of the Internet

The Web can be traced back to a project at CERN in 1989 when Tim Berners-Lee and Robert Cailliau built ENQUIRE (short for Enquire Within Upon Everything, a book Berners-Lee recalled from his youth). While it was rather different from the Web we use today, it contained many of the same core ideas (and even some of the ideas of Berners-Lee's next project, the Semantic Web). Berners-Lee mentions that much of the motivation behind the project was so that he could access library information that was scattered on several different servers at CERN.

Tim Berners-Lee published a more formal proposal for the actual World Wide Web on November 12, 1990 [1] http://www.w3.org/Proposal and wrote the first web page [2] http://www.w3.org/History/19921103-hypertext/hypertext/WWW/Link.html on November 13 on a NeXT workstation. Over Christmas of that year Berners-Lee built all the tools necessary for a working Web [3] http://www.w3.org/People/Berners-Lee/WorldWideWeb , the first actual web browser (which was a web-editor as well), and the first web server. On August 6, 1991, he posted a short summary of the WorldWideWeb project http://groups.google.com/groups?selm=6487%40cernvax.cern.ch on the alt.hypertext newsgroup.

The primary underlying concept of hypertext came from earlier efforts, such as Ted Nelson's Project Xanadu and Douglas Engelbart's NLS (NLS). Both Nelson and Engelbart were in turn inspired by Vannevar Bush's microfilm-based "memex," which was described in the 1945 essay As We May Think. Berners-Lee's brilliant breakthrough was to marry hypertext to the Internet. In the process he developed a system of globally unique identifiers for resources on the Web and elsewhere: the Uniform Resource Identifier.

The World Wide Web had a number of differences of hypertext systems that were then in place.

  • The WWW required only unidirectional links rather than bidirectional ones. This made it possible for someone to link to another resource without action by the owner of that resource.
  • Unlike certain applications such as HyperCard or Gopher, the World Wide Web was non-proprietary, making it possible to develop servers and clients independently and to add extensions without licensing restrictions.

On April 30, 1993 CERN announced http://info.web.cern.ch/info/Announcements/CERN/2003/04-30TenYearsWWW/Declaratio
n/Page1.html
that the World Wide Web would be free to anyone, with no fees due.

The three standards

The Web is made up of three standards: The Uniform Resource Locator (URL), which specifies how each page of information is given a unique "address" at which it can be found; Hyper Text Transfer Protocol (HTTP), which specifies how the browser and server send the information to each other, and Hyper Text Markup Language (HTML), a method of encoding the information so it can be displayed on a variety of devices. Berners-Lee now heads the World Wide Web Consortium, which develops and maintains these standards and others that enable computers on the Web to effectively store and communicate all kinds of information.

Beyond text

Screenshot of the very first WWW browser running on a NeXT system
Screenshot of the very first WWW browser running on a NeXT system

The initial "www" program at CERN displayed styled text and images, and it was a WYSIWYG HTML editor as well as the browser.

As it ran only on NeXT machines, CERN released a simple, text-only version to the world. Some journalists first encountered the Web through the text browser written by Nicola Pellow and this engendered a myth that the Web was text-only until Mosaic came along. The Web had graphics from the start, at least for NeXT users. However, Mosaic did introduce the ability to combine text and images in a single page.

Meanwhile, browsers such as Tony Johnson's "Midas" and Pei-Yuan Wei's Viola (1991) added the ability to display graphics also on other Unix machines. Marc Andreessen of NCSA released a browser called "Mosaic for X" in 1993 that sparked a tremendous rise in the popularity of the Web among novice users. Andreesen went on to found Mosaic Communications Corporation (now Netscape Communications, a unit of Time Warner). Additional features such as dynamic content, music and animation can be found in modern browsers.

Frequently, the technical capability of browsers and servers advances much faster than the standards bodies can keep up with, so it is not uncommon for these newer features not to work properly on all computers, and the web as seen by Netscape or Mozilla Firefox is not quite the same as the web seen by Internet Explorer. The ever-improving technical capability of the WWW has enabled the development of real-time web-based services such as webcasts, web radio and live web cams.

Java and JavaScript

Another significant advance in the technology was Sun Microsystems' Java programming language, which enabled web servers to embed small programs (called applets) directly into the information being served that would run on the user's computer, allowing faster and richer user interaction.

JavaScript however, is a scripting language that was developed for Web pages. While its name is similar to Java it was developed by Netscape and not Sun Microsystems. In conjunction with the Document Object Model, JavaScript has become a much more powerful language than its creators originally envisioned. Sometimes its usage is expressed under the term DHTML, or Dynamic HTML, to emphasize a shift away from static HTML pages.

Sociological implications

The exponential growth of the Internet was primarily attributed to the emergence of the web browser Mosaic, followed by its commercial offspring Netscape Navigator, during the mid-1990s.

It brought unprecedented attention to the Internet from media, industries, policy makers, and the general public.

Eventually, it led to several visions of how our society might change, although some point out that those visions are not unique to the Internet, but repeated with many new technologies (especially information and communications technologies) of various era.

Because the web is global in scale, some suggested that it will nurture mutual understanding on a global scale.

Publishing web pages

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.

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.

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 became 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 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.

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.

Statistics

According to a 2002 survey of 2,024 web pages [4] http://www.netz-tipp.de/languages.html , by far the most Web content was in English: 56.4%; next were pages in German (7.7%), French (5.6%) and Japanese (4.9%).

According to a 2001 study [5] http://www.brightplanet.com/technology/deepweb.asp , there were more than 550 billion documents on the web, mostly in the "invisible web".

Speed issues

Frustration over congestion issues in the Internet infrastructure and the high latency that results in slow browsing has lead to an alternative name for the Web: the World Wide Wait. Speeding up the Internet is a still undergoing discussion over the use of peering and QoS technologies. Other solutions to reduce the World Wide Wait can be found on W3C http://www.w3.org/Protocols/NL-PerfNote.html .

Academic conferences

The major academic event covering the WWW is the World Wide Web series of conferences, promoted by IW3C2 http://www.iw3c2.org . There is a list http://www.iw3c2.org/Conferences/Welcome.html with links to all conferences in the series.

Pronunciation of "www"

Most English-speaking people pronounce the 9-syllable letter sequence www used in some domain names for websites as "double U, double U, double U", but many shorter pronunciations can be heard: "triple double U", "double U, double U" (omitting one W), "dub, dub, dub", "hex u", etc. Perhaps a shorter pronunciation will become standard usage in the future.

See also

External links

  • Architecture of the World Wide Web, Volume One http://www.w3.org/TR/2004/REC-webarch-20041215/
  • Complete Guide to Internet Statistics and Research, including WWW http://internet-statistics-guide.netfirms.com
  • Internet Statistics: Growth and Usage of the Web and the Internet http://www.mit.edu/people/mkgray/net/
  • 31 December, 2003, BBCNews: Web's inventor gets a knighthood http://news.bbc.co.uk/1/hi/technology/3357073.stm The inventor of the world wide web, Tim Berners-Lee, has been awarded a knighthood for his pioneering work. Citat: "...The original idea of the web was that it should be a collaborative space where you can communicate through sharing information..."
  • http://dmoz.org/Computers/Internet/Web_Design_and_Development/
  • First known web page http://www.w3.org/History/19921103-hypertext/hypertext/WWW/TheProject.html
  • Tutorials for Beginning Computer Users: How the Web Works http://www.bleepingcomputer.com/forums/tutorial45.html
  • Red vs. Blue's Reality vs. the Internet (video) http://demandmedia.net/story/2004/8/13/18037/9310





Last updated: 05-03-2005 17:50:55