An Ancient Computer Surprises Scientists - Antikythera Mechanism
for more see or An Ancient Computer Surprises Scientists - New York Times:
"The mechanism, presumably used in preparing calendars for seasons of planting and harvesting and fixing religious festivals, had at least 30, possibly 37, hand-cut bronze gear-wheels, the researchers reported. An ingenious pin-and-slot device connecting two gear-wheels induced variations in the representation of lunar motions according to the Hipparchos model of the Moon’s elliptical orbit around Earth."
An interesting point that was raised on a Radio 4 programme about the subject was that the word 'Antropos' from which we get Antropology, and which is the name for humans in Greek, means someone/thing who looks at the sky.