Integrantes: Leonardo Camus Jocelin Olivares Claudia Hernández Curso: 4medio C Fecha: 19/08/10

Chronology A.C. Year Invention of Abacus in China. Year B.C. In the Inca empire is used the system of accounts John Napier rods Napier develops Blaise Pascal builds the first mechanical calculator William Oughtred invents the slide rule Joseph Marie Jackard perfected the first machine to use punch cards

Chronology 1822 Charles Babbage built a small working model of a calculating machine called Differences 1829 Charles Xavier Thomas, built the first calculator that runs the four arithmetic operations exactly Frank Stephen Baldwin invents a calculator with buttons based on the principles of the machine Charles Thomas J. Presper Ecker and John Mauchly Computer, built the first fully electronic the E.N.I.A.C. (Electronic Numerical Integrator And Calculator), weighed about 30 tons, occupying an approximate area of 1,500 square feet and used about 18,000 tubes. ENIAC could solve a day what would take 300 days manually John Von Neumann developed the concept of stored programs, ie, a set of instructions stored in a storage unit, which are then executed sequentially. Based on this concept, Ecker and Mauchly designed the ENIVAC, which was completed in 1952

First generation

Second generation

Thirth generation

Fourth generation

Fifth generation