Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen

Apple’s iOS may be undergoing the biggest change since its inception, but that doesn’t mean the spirit of the operating system hasn’t been floating around designer’s heads for hundreds of years. In 1525, before the iPhone was even a twinkle in Steve Jobs’ eye, German polymath Albrecht Dürer was espousing similar design principles using the same, now-infamous letters: I, O, and S.