The World Wide Web ("WWW" or simply the "Web") is a global, read-write information space. Text documents, images, multimedia and many other items of information, referred to as resources, are identified by short, unique, global identifiers called Uniform Resource Identifiers (URIs) so that each can be found, accessed and cross-referenced in the simplest possible way.
The term is often mistakenly used as a synonym for the Internet itself, but the Web is actually something that is available over the Internet, just like e-mail and many other Internet services.
Basic terms
The World Wide Web is the combination of four basic ideas:
Hypertext: a format of information which allows one, in a computer environment, to move from one part of a document to another or from one document to another through internal connections among these documents (called "hyperlinks");
Resource Identifiers: unique identifiers used to locate a particular resource (computer file, document or other resource) on the network;
The Client-server model of computing: a system in which client software or a client computer makes requests of server software or a server computer that provides the client with resources or services, such as data or files; and
Markup language: characters or codes embedded in text which indicate structure, semantic meaning, or advice on presentation.
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