Aljohn Mark Mendoza,Jomar Quimay and Jay Hernani           Section: EA

 THE PERSONAL INSIGHT OF THE HISTORY OF COMPUTER

• Abacus

      Abacus is a calculating device use for arithmetic processes. There are 3 ages of Abacus, one is Ancient Time. Ancient time has ten beads were strung onto wires attached to a frame. Addition and subtraction were read from the final positions of the beads. It was considered the first manual tool used in calculating answers to problems that provided information and in a primitive way storing the results.Middle age the apices, coin board and line board. Modern times was the Suan-pan, Suroban and the Schoty.

• Napiers Bone
  

     Created by John Napier of Merchiston for calculation of products and quotients of numbers. In 1917 a treatise in Latin tittle Rabdologize written by him and published in Edinburgh. Napier also invented logarithms, which are a technology that allows multiplication to be performed by addition. He also invented the slide rule, first built in England in 1632and still use in the 1960's by NASA engineers.

• Calculating clock
  
  
  
  
  

     The first gear-driven calculating machine to actually be built was probably the calculating clock, so named by its inventor, the German professor Wilhelm Schickard in 1623. This device got little publicity because Schickard died soon afterward in the bubonic plague.

•     Pascaline
  

      Invented by Blaise Pascal, at age of 19. Pascal built 50 of this gear-driven one-function calculator but couldn't sell many because of their exorbitant cost and they really weren't that accurate.

• Punched Card
  

     Punched cards were first used around 1725 by Basile Bouchon and Jean-Baptiste Falcon as a more robust form of the perforated paper rolls then in use for controlling textile looms in France. This technique was greatly improved by Joseph Marie Jacquard in his Jacquard loom in 1801.Semen Korsakovwas reputedly the first to use the punched cards in informatics for information store and search. 

•  Leibniz Wheel
  

    Gottfried Wilhelm Leibniz was a german mathematician and philosopher.He was the inventor of  Leibniz wheel and he occupies a prominent place in the history of mathematics and the history of philosophy.