Linking of related information by electronic connections in order to allow a user easy access between them. Conceptualized by Vannevar Bush (1945) and invented by Douglas Engelbart in the 1960s, hypertext is a feature of some computer programs that allows the user to select a word and receive additional information, such as a definition or related material. In Internet browsers, hypertext links (hotlinks) are usually denoted by highlighting a word or phrase with a different font or colour. Hypertext links create a branching or network structure that permits direct, unmediated jumps to related information. Hypertext has been used most successfully as an essential feature of the World Wide Web (seeHTML; HTTP). Hyperlinks may also involve objects other than text (e.g., selecting a small picture may provide a link to a larger version of the same picture).