The story
Blend of memory + index, coined by Vannevar Bush in his article As We May Think (1945) in The Atlantic Monthly.
Etymology from Wiktionary, CC BY-SA 4.0.
memex
Today it means: A proposed computer system, implemented with electromechanical controls and microfilm equipment, that would permit a researcher to follow and annotate topics of interest, analogous to later hypertext technologies. Full definition →