Ancient Greeks had a "computer"

[melody]

Ancient Greeks used "computer" to predict solar and lunar eclipses and also to set Olympics date that began every fourth year on the full moon closest to the summer solstice.

http://www.reuters.com/article/technologyNews/idUSL06431620080731?feedType=nl&feedName=ustechnology&pageNumber=1&virtualBrandChannel=10003&sp=true