The history of wikis dates from 1994, when Ward Cunningham invented the concept and gave it its name (he gave the name "WikiWikiWeb" to both the wiki, which ran on his company's website at c2.com, and the wiki software that powered it). c2.com thus became the first wiki, or a website with pages that can be edited via the browser, with a version history for each page. Before 1994, however, there were several historical antecedents to wikis. One of the earliest precursors was Vannevar Bush's vision of a microfilm hypertext system which he called the "memex" (1945). In wiki essay, other precursors were an early collaborative hypertext database called the ZOG (1972), and the Apple Computer hypertext system called HyperCard (1987).