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500 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 exact origin of the abacus is still unknown. The abacus essentially consists of a number of rows of movable beads or other objects, which represent digits. -
Table of Napier
Napier's bones is a manually-operated calculating device created by John Napier of Merchiston, Scotland for the calculation of products and quotients of numbers. The method was based on lattice multiplication, and also called 'rabdology', a word invented by Napier. Napier published his version in 1617 in Rabdologiæ,[1] printed in Edinburgh, dedicated to his patron Alexander Seton. -
Calculator of Wilhelm Schickard
In 1623 Wilhelm Schickard invented a device that made it possible to perform arithmetic operations completely mechanically, the Rechenuhr or calculating clock. This calculator used a complex system of rods and gears that mechanized operations that previously had to be performed manually. No original model of this machine has been preserved; modern replicas (like this one) have been created thanks to the author's designs that have been preserved. -
Calculador of Pascal
Wilhelm Schickard en 1623 ya había realizado un diseño previo, aunque no hay evidencias de que llegara a construirse y estaba incompleto, ya que hubiera necesitado muelles y engranajes adicionales para funcionar correctamente.
En 1642, Pascal diseñó y construyó la primera calculadora del mundo de la que existe constancia.rar. -
IBM first PC
The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first computer released in the IBM PC model line and the basis for the IBM PC compatible de facto standard. Released on August 12, 1981, it was created by a team of engineers and designers directed by Don Estridge in Boca Raton, Florida. -
Macbook pro
The MacBook Pro is a line of Macintosh portable computers introduced in January 2006, by Apple Inc. It is the higher-end model of the MacBook family, sitting above the consumer-focused MacBook Air, and is sold with 13- and 16-inch screens. A 17-inch version was sold from April 2006 to June 2012.
