Τηλεκπαίδευση

The World Wide Web ("WWW" or simply the "Web") is a global information space which people can read and write via computers connected to the Internet. The term is often mistakenly used as a synonym for the Internet itself, but the Web is actually a service that operates over the Internet, just like e-mail. ( from http://en.wikipedia.org/)

The World Wide Web is the combination of four basic ideas:

• hypertext, that is the ability, 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, that is the ability, on a computer network, to locate a particular resource (computer, document or other resource) on the network through a unique identifier;

• the client-server model of computing, 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, in which characters or codes embedded in text indicate to a computer how to print or display the text, e.g. as in italics or bold type or font.