When you picture an old computer, do you see a giant machine that takes up an entire room? These days, people might consider even something like a CRT monitor and a device running Windows XP to be ancient. Yet, the oldest “computer” in the world may actually be a bronze contraption found off the coast of Greece; the Antikythera mechanism, which was used to predict and track astronomical events, like the movement of the planets and occurrence of eclipses.