A hyperlink, also called simply “a link”, is a reference in a hypertext document to another document or other resource. It is an integral part of the hypertext transfer protocol (http) for World Wide Web, but it is used also in offline documents, such as .pdf (portable document file, Adobe Acrobat native format) and in .XML (extended markup language). Hyperlink can be used to fetch content and save it, view it as a separate document or display as a part of the reference document.
The history of the hyperlink
The history of the hyperlink began in 1965. Theodore Nelson in “the Xanadu Project” transposed the idea from fictional microfilm cross-referencing system into the computer world. In a series of books and articles published from 1964 through 1980 the general concept was changed from linking whole microfilm pages to connecting specific lines of computer text. Primary concept was intended to use on single computer machine, however introduction of DARPA network boosted the idea into creating links between documents and files stored on several networked machines. The idea of connecting parts of a single document via hyperlink arose...