Hex (Discworld)
Hex is a fictional computer featuring in the Discworld novels by Terry Pratchett. First appearing in Soul Music, Hex is an elaborate, magic-powered and self-building computer, (not unlike a 'shamble'; a kind of magical device used by the Witches of the Discworld,) and is housed in the basement of the High Energy Magic Building, at the Unseen University (UU), in the Twin city of Ankh-Morpork.
Hex is a computer unlike any other the Disc has ever seen, (which is not particularly hard since previously all other "computers" on the Disc had consisted of druidic stone circles). Programmed via 'Softlore', Hex runs and evolves under the watchful eyes of wizard Ponder Stibbons, who becomes the de facto IT manager at UU because he's the only one who understands what he's talking about.
Read more about Hex (Discworld): Origins and Evolution, Structure and Technology, Other Discworld Computers, Messages, Appearances, Real World Connections