Hypertext
A method of organizing and accessing text or other data, such as tables, presentational content and images, through hyperlinks. Anyone who's been on Internet is familiar with hypertext as it's in every link they click or tap on their screen.
Hypertext is a concept that was mentioned in a 1945 Atlantic Monthly article by Vannevar Bush. In the article, he hypothesized a photoelectric mechanical device called a Memex (for "memory extension") that could create and follow links between microfiche documents.
This concept was later coined by Ted Nelson in 1965 who worked for and with Andries van Dam at Brown University. Andries, with the help of Ted and other Brown University students, created an HES (hypertext editing system). However, the first public display of hypertext was by Douglas Engelbart on December 9, 1968, at The Mother of All Demos.