World's Oldest Computer Reconstructed in Lego Check Out The World's Oldest Computer, Replicated in Lego

The world's first computer, called the Antikythera Mechanism, dates back to 150 B.C. It used gears and a clock-like display to compute complicated mathematics for predicting astronomical events. Now the designer Adam Carol has reconstructed the ancient relic in an elaborate demonstration of Lego aptitude.

New Scientist has more on the world's first computer, including how it was re-discovered after the Antikythera shipwreck in 1900.