Hypertext is text that links to other information. By clicking on a hypertext link, a user can quickly jump to different content. Though hypertext is usually associated with the Web, the technology has been around since the 1960s. Software programs that include dictionaries and encyclopedias have long used hypertext in their definitions so that readers can quickly find out more about specific words or topics.
"Hypertext" is a term created by visionary Ted Nelson to describe non-linear writing in which you follow associative paths through a world of textual documents. The most common use of hypertext these days is found in the links on WorldWideWeb pages.
HTML - HyperTextMarkupLanguage PHP - HypertextPreProcessor
Style Guide for online hypertext