For any reason if you want to find the mobile number of a friend, the best place to find it is facebook. So, you can easily find most of your friend’s mobile number on facebook by searching on the Contacts page from your facebook account. Once you log into your account, click on the [Accounts ] tab (top-right on the navigation bar) and select Edit Friends link. This list pulls together the contact information your friends already share with you on their profiles into one convenient place. Though this is fine, you might not want to share your mobile number so publicly (with friends) on facebook unknowingly. Background InformationSOS Children volunteers helped choose articles and made other curriculum material Sponsor a child to make a real difference. The World Wide Web (abbreviated as WWW or W3, commonly known as the Web), is a system of interlinked hypertext documents accessed via the Internet. Using concepts from his earlier hypertext systems like ENQUIRE, British engineer, computer scientist and at that time employee of CERN, Sir Tim Berners-Lee, now Director of the World Wide Web Consortium (W3C), wrote a proposal in March 1989 for what would eventually become the World Wide Web.
In March 1989, Tim Berners-Lee wrote a proposal that referenced ENQUIRE, a database and software project he had built in 1980, and described a more elaborate information management system. With help from Robert Cailliau, he published a more formal proposal (on 12 November 1990) to build a "Hypertext project" called "WorldWideWeb" (one word, also "W3") as a "web" of "hypertext documents" to be viewed by " browsers" using a client–server architecture. The proposal was modeled after the Dynatext SGML reader by Electronic Book Technology, a spin-off from the Institute for Research in Information and Scholarship at Brown University. The crucial underlying concept of hypertext originated with older projects from the 1960s, such as the Hypertext Editing System (HES) at Brown University, Ted Nelson's Project Xanadu, and Douglas Engelbart's oN-Line System (NLS). The World Wide Web had a number of differences from other hypertext systems that were then available. Robert Cailliau, Jean-François Abramatic of IBM, and Tim Berners-Lee at the 10th anniversary of the World Wide Web Consortium.
Scholars generally agree that a turning point for the World Wide Web began with the introduction of the Mosaic web browser in 1993, a graphical browser developed by a team at the National Centre for Supercomputing Applications at the University of Illinois at Urbana-Champaign (NCSA-UIUC), led by Marc Andreessen. The World Wide Web Consortium (W3C) was founded by Tim Berners-Lee after he left the European Organization for Nuclear Research (CERN) in October 1994. Connected by the existing Internet, other websites were created around the world, adding international standards for domain names and HTML. The terms Internet and World Wide Web are often used in everyday speech without much distinction.
Viewing a web page on the World Wide Web normally begins either by typing the URL of the page into a web browser or by following a hyperlink to that page or resource. The computer receiving the HTTP request delivers it to web server software listening for requests on port 80. The web browser parses the HTML, interpreting the markup (, for paragraph, and such) that surrounds the words in order to draw the text on the screen. Many web pages use HTML to reference the URLs of other resources such as images, other embedded media, scripts that affect page behaviour, and Cascading Style Sheets that affect page layout.
Most web pages contain hyperlinks to other related pages and perhaps to downloadable files, source documents, definitions and other web resources. Such a collection of useful, related resources, interconnected via hypertext links is dubbed a web of information. The hyperlink structure of the WWW is described by the webgraph: the nodes of the webgraph correspond to the web pages (or URLs) the directed edges between them to the hyperlinks.
Over time, many web resources pointed to by hyperlinks disappear, relocate, or are replaced with different content. JavaScript is a scripting language that was initially developed in 1995 by Brendan Eich, then of Netscape, for use within web pages. Many domain names used for the World Wide Web begin with www because of the long-standing practice of naming Internet hosts (servers) according to the services they provide. The use of a subdomain name is useful for load balancing incoming web traffic by creating a CNAME record that points to a cluster of web servers. Use of the www prefix is declining as Web 2.0 web applications seek to brand their domain names and make them easily pronounceable. Every time a web page is requested from a web server the server can identify, and usually it logs, the IP address from which the request arrived. When a web page asks for, and the user supplies, personally identifiable information such as their real name, address, e-mail address, etc., then a connection can be made between the current web traffic and that individual. Social networking sites make a point of trying to get the user to truthfully expose their real names, interests and locations.
Photographs and videos posted onto websites have caused particular problems, as they can add a person's face to an on-line profile. Many users of the web erroneously assume that everything they may find on line is freely available to them as if it was in the public domain. Many formal standards and other technical specifications and software define the operation of different aspects of the World Wide Web, the Internet, and computer information exchange.
Uniform Resource Identifier ( URI), which is a universal system for referencing resources on the Internet, such as hypertext documents and images. There are methods available for accessing the web in alternative mediums and formats, so as to enable use by individuals with disabilities. The W3C Internationalization Activity assures that web technology will work in all languages, scripts, and cultures.
Between 2005 and 2010, the number of Web users doubled, and was expected to surpass two billion in 2010. Statistics measuring a website's popularity are usually based either on the number of page views or on associated server ' hits' (file requests) that it receives.
Frustration over congestion issues in the Internet infrastructure and the high latency that results in slow browsing has led to a pejorative name for the World Wide Web: the World Wide Wait.
If a user revisits a Web page after only a short interval, the page data may not need to be re-obtained from the source Web server.
Wikipedia for Schools is a selection taken from the original English-language Wikipedia by the child sponsorship charity SOS Children.
This helped me a lot to quickly find mobile numbers of facebook friends who are not there on my phone. You should then read on to see the privacy settings for hiding your contact information from Friends and strangers or specific people on facebook.


Once again go to your account, click on the [Accounts ] tab and select Privacy Settings link. On the Customize settings page scroll down to find Contact information section and it will show you all the contact information and whom you allow to see it. In the next window under Make this visible to you can select the option Only Me or the others. With a web browser, one can view web pages that may contain text, images, videos, and other multimedia, and navigate between them via hyperlinks. At CERN, a European research organisation near Geneva situated on Swiss and French soil, Berners-Lee and Belgian computer scientist Robert Cailliau proposed in 1990 to use hypertext "to link and access information of various kinds as a web of nodes in which the user can browse at will", and they publicly introduced the project in December of the same year.
Clarke predicted that satellites would someday "bring the accumulated knowledge of the world to your fingertips" using a console that would combine the functionality of the photocopier, telephone, television and a small computer, allowing data transfer and video conferencing around the globe. The Dynatext system, licensed by CERN, was technically advanced and was a key player in the extension of SGML ISO 8879:1986 to Hypermedia within HyTime, but it was considered too expensive and had an inappropriate licensing policy for use in the general high energy physics community, namely a fee for each document and each document alteration. 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". In his book Weaving The Web, he explains that he had repeatedly suggested that a marriage between the two technologies was possible to members of both technical communities, but when no one took up his invitation, he finally tackled the project himself.
Since then, Berners-Lee has played an active role in guiding the development of web standards (such as the markup languages in which web pages are composed), and in recent years has advocated his vision of a Semantic Web.
The web browser then initiates a series of communication messages, behind the scenes, in order to fetch and display it. The browser then requests the resource by sending an HTTP request across the Internet to the computer at that particular address. The browser will make additional HTTP requests to the web server for these other Internet media types.
This makes hyperlinks obsolete, a phenomenon referred to in some circles as link rot and the hyperlinks affected by it are often called dead links.
The hostname for a web server is often www, in the same way that it may be ftp for an FTP server, and news or nntp for a USENET news server.
Since, currently, only a subdomain can be used in a CNAME, the same result cannot be achieved by using the bare domain root. Unlike www, which has no specific purpose, these specify the communication protocol to be used for the request and response. This means delivery of HTML documents and any additional content that may be included by a document, such as images, style sheets and scripts. Equally, unless set not to do so, most web browsers record the web pages that have been requested and viewed in a history feature, and usually cache much of the content locally. If the website uses HTTP cookies, username and password authentication, or other tracking techniques, then it will be able to relate other web visits, before and after, to the identifiable information provided. This makes the social networking experience more realistic and therefore engaging for all their users.
With modern and potential facial recognition technology, it may then be possible to relate that face with other, previously anonymous, images, events and scenarios that have been imaged elsewhere. Web users who want to publish their work onto the World Wide Web, however, need to be aware of the details of the way they do it. This is almost never the case, unless the web site publishing the work clearly states that it is.
Cybercrime carried out on the Web can include identity theft, fraud, espionage and intelligence gathering. Many of the documents are the work of the World Wide Web Consortium (W3C), headed by Berners-Lee, but some are produced by the Internet Engineering Task Force (IETF) and other organizations. These disabilities may be visual, auditory, physical, speech related, cognitive, neurological, or some combination therin.
Beginning in 2004 or 2005, Unicode gained ground and eventually in December 2007 surpassed both ASCII and Western European as the Web's most frequently used character encoding. Speeding up the Internet is an ongoing discussion over the use of peering and QoS technologies. Corporate and academic firewalls often cache Web resources requested by one user for the benefit of all.
On 6 August 1991, he posted a short summary of the World Wide Web project on the alt.hypertext newsgroup. This made it possible for someone to link to another resource without action by the owner of that resource. High-Performance Computing and Communications Initiative and the High Performance Computing and Communication Act of 1991, one of several computing developments initiated by U.S. By the end of 1994, while the total number of websites was still minute compared to present standards, quite a number of notable websites were already active, many of which are the precursors or inspiration for today's most popular services. The World Wide Web enabled the spread of information over the Internet through an easy-to-use and flexible format. It makes the request to a particular application port in the underlying Internet Protocol Suite so that the computer receiving the request can distinguish an HTTP request from other network protocols it may be servicing such as e-mail delivery; the HTTP protocol normally uses port 80. As it receives their content from the web server, the browser progressively renders the page onto the screen as specified by its HTML and these additional resources. To make web pages more interactive, some web applications also use JavaScript techniques such as Ajax ( asynchronous JavaScript and XML). This feature started appearing in early versions of Mozilla Firefox, when it still had the working title 'Firebird' in early 2003, from an earlier practice in browsers such as Lynx.
The HTTP protocol is fundamental to the operation of the World Wide Web and the added encryption layer in HTTPS is essential when confidential information such as passwords or banking information are to be exchanged over the public Internet. Unless HTTPS encryption is used, web requests and responses travel in plain text across the internet and they can be viewed, recorded and cached by intermediate systems.
In this way it is possible for a web-based organisation to develop and build a profile of the individual people who use its site or sites. On the other hand, photographs uploaded and unguarded statements made will be identified to the individual, who may regret some decisions to publish these data. Because of image caching, mirroring and copying, it is difficult to remove an image from the World Wide Web.
If artwork, photographs, writings, poems, or technical innovations are published by their creator onto a privately owned web server, then they may choose the copyright and other conditions freely themselves. On the other hand, content owners are aware of this widespread belief, and expect that sooner or later almost everything that is published will probably be used in some capacity somewhere without their permission.


Web-based vulnerabilities now outnumber traditional computer security concerns, and as measured by Google, about one in ten web pages may contain malicious code. Some have argued that for enterprise to see security as a business opportunity rather than a cost centre, "ubiquitous, always-on digital rights management" enforced in the infrastructure by a handful of organizations must replace the hundreds of companies that today secure data and networks.
Accessibility features also help others with temporary disabilities like a broken arm or the aging population as their abilities change. According to a 2001 study, there were a massive number, over 550 billion, of documents on the Web, mostly in the invisible Web, or Deep Web. HTTP requests sent by a browser will usually ask only for data that has changed since the last download. If you want to hide your contact number on facebook completely from everyone choose Customize.
This date also marked the debut of the Web as a publicly available service on the Internet.
It also significantly reduced the difficulty of implementing web servers and browsers (in comparison to earlier systems), but in turn presented the chronic problem of link rot. It is reported that Microsoft was granted a US patent for the same idea in 2008, but only for mobile devices. The English writer Douglas Adams once quipped in The Independent on Sunday (1999): "The World Wide Web is the only thing I know of whose shortened form takes three times longer to say than what it's short for". It may be able to build a record for an individual that includes information about their leisure activities, their shopping interests, their profession, and other aspects of their demographic profile. Employers, schools, parents and other relatives may be influenced by aspects of social networking profiles that the posting individual did not intend for these audiences.
This is unusual though; more commonly work is uploaded to web sites and servers that are owned by other organizations.
Many publishers therefore embed visible or invisible digital watermarks in their media files, sometimes charging users to receive unmarked copies for legitimate use.
Most Web-based attacks take place on legitimate websites, and most, as measured by Sophos, are hosted in the United States, China and Russia. The Web is used for receiving information as well as providing information and interacting with society.
Apart from the facilities built into Web servers that can determine when files have been updated and so need to be re-sent, designers of dynamically generated Web pages can control the HTTP headers sent back to requesting users, so that transient or sensitive pages are not cached.
These articles are available under the Creative Commons Attribution Share-Alike Version 3.0 Unported Licence.
Unlike predecessors such as HyperCard, the World Wide Web was non-proprietary, making it possible to develop servers and clients independently and to add extensions without licensing restrictions.
Prior to the release of Mosaic, graphics were not commonly mixed with text in web pages and the Web's popularity was less than older protocols in use over the Internet, such as Gopher and Wide Area Information Servers (WAIS). Although the two terms are sometimes conflated in popular use, World Wide Web is not synonymous with Internet. It is a collection of text documents and other resources, linked by hyperlinks and URLs, usually accessed by web browsers from web servers.
It depends upon the terms and conditions of the site or service provider to what extent the original owner automatically signs over rights to their work by the choice of destination and by the act of uploading. The World Wide Web Consortium claims it essential that the Web be accessible in order to provide equal access and equal opportunity to people with disabilities. A more recent study, which used Web searches in 75 different languages to sample the Web, determined that there were over 11.5 billion Web pages in the publicly indexable Web as of the end of January 2005.
On 30 April 1993, CERN announced that the World Wide Web would be free to anyone, with no fees due. Mosaic's graphical user interface allowed the Web to become, by far, the most popular Internet protocol.
Many established websites still use 'www', or they invent other subdomain names such as 'www2', 'secure', etc. Tim Berners-Lee's web-space states that World Wide Web is officially spelled as three separate words, each capitalised, with no intervening hyphens. Depending on the website's terms and conditions and the local laws that apply information from these profiles may be sold, shared, or passed to other organisations without the user being informed.
Through HTML and URIs the Web was vulnerable to attacks like cross-site scripting (XSS) that came with the introduction of JavaScript and were exacerbated to some degree by Web 2.0 and Ajax web design that favors the use of scripts. The decision about expiration is made independently for each downloaded file, whether image, stylesheet, JavaScript, HTML, or other web resource. Coming two months after the announcement that the server implementation of the Gopher protocol was no longer free to use, this produced a rapid shift away from Gopher and towards the Web.
Tim Berners-Lee was knighted in 2004 by Queen Elizabeth II for his contribution to the World Wide Web. For many ordinary people, this means little more than some unexpected e-mails in their in-box, or some uncannily relevant advertising on a future web page. Access by everyone regardless of disability is an essential aspect." Many countries regulate web accessibility as a requirement for websites.
On 25 July 2008, Google software engineers Jesse Alpert and Nissan Hajaj announced that Google Search had discovered one trillion unique URLs. Thus even on sites with highly dynamic content, many of the basic resources need to be refreshed only occasionally. For others, it can mean that time spent indulging an unusual interest can result in a deluge of further targeted marketing that may be unwelcome.
International cooperation in the W3C Web Accessibility Initiative led to simple guidelines that web content authors as well as software developers can use to make the Web accessible to persons who may or may not be using assistive technology. Web site designers find it worthwhile to collate resources such as CSS data and JavaScript into a few site-wide files so that they can be cached efficiently. Law enforcement, counter terrorism and espionage agencies can also identify, target and track individuals based on what appear to be their interests or proclivities on the web.




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