Minoans may have invented the first portable eclipse calculator, predating the Antikythera mechanism by over a millennium.

the ' Kurta Calculator ', which has been the best portable calculator on earth for about 20 years, is said to have been invented by a prisoner who was held in a Nazi concentration camp.

SEE MORE The Curta calculator, invented by Curt Herzstark during his imprisonment in a Nazi concentration camp. (Photo courtesy of Holocaust Center for Humanity) In an age when a smartphone or an ...