At www.pugetsound.edu/news-and-events/campus-news/details/1345/ … the ancient Greek Antikythera Mechanism, known as the world's first computer, salvaged from an ancient ship wreck, may be older than scientists first thought. It seems it might go back as far as 205BC according to recent calculations. It is thought to be an eclipse calculator rather than a computer – but why the Greeks would want to predict eclipses is another matter. It may be that eclipses are the least controversial explanation of the mechanism. The latest research brings the date nearer Archimedes. According to Cicero something similar was created by Archimedes but carried off to Rome after they sacked Syracuse in 212BC. You never know.