“Early printing was long associated with devilry…

…One popular theory is linked to the fanciful belief among printers that a special demon, Titivillus (also referred to as “the original printer’s devil”), haunted every print shop, performing mischief such as inverting type, misspelling words, and removing entire lines of completed type. Titivillus was said to execute his pranks by influencing the young apprentices – or “printer’s devils” – as they set up type, or by causing errors to occur during the actual casting of metal type. High-profile printing errors “blamed” on Titivillus included the omission of the word not in the 1631 Authorized Version of the Bible, which resulted in Exodus 20:14 appearing as “Thou shalt commit adultery.”

Often depicted as a creature with claw-like feet and horns on his head, the origins of the Titivillus legend date back to the Middle Ages, when he was said to collect “fragments of words” that were dropped or misspoken by the clergy or laiety in a sack to deliver to Satan daily, and later, to record poorly recited prayers and gossip overheard in church with a pen on parchment, for use on Judgement Day.”