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2300 BCE
Abacus
The abacus, also called a counting frame, is a calculating tool that was in use in the ancient Near East, Europe, China, and Russia, centuries before the adoption of the written Arabic numeral system. -
The Neperian Ábacus
Napier's abacus is an abacus invented by John Napier who published the description of it in a work printed in Edinburgh in late 1617 entitled Rhabdologia. By this method, the products are reduced to addition operations and the quotients to subtractions; As with the tables of logarithms, invented by himself, the powers are transformed into products and the roots into divisions. -
The Pascalina
The pascaline was the first calculator that worked on wheels and gears, invented in 1642 by the French philosopher and mathematician Blaise Pascal (1623-1662). The first name he gave to his invention was 'arithmetic machine'. Then he called «pascaline wheel», and finally «pascaline». This invention is the remote ancestor of today's computer
