tailieunhanh - Timeline of computing hisrory

To commemorate the 50th year of modern computing and the Computer Society, the timeline on the following pages traces the evolution of computing and computer technology. | ro commemorate the 50th year of modern computing and the Computer Society the timeline on the following pages traces the evolution of computing and computer technology. Timeline research by Bob Carlson Angela Burgess and Christine Miller. Timeline design and production by Larry Bauer. We thank our reviewers Ted Biggerstaff George Cybenko Martin Campbell-Kelly Alan Davis Dan O Leary Edward Parrish and Michael Williams. Timeline of Computing History 4000-1200 . Inhabitants of the first known civilization in Sumer keep records of commercial transactions on clay tablets. 3000 . The abacus is invented in Babylonia. 250-230 . The Sieve of Eratosthenes is used to determine prime numbers. About 79 . The Antikythera Device when set correctly according to latitude and day of the week gives alternating 29- and 30-day lunar months. About 1300 The more familiar wire-and-bead abacus replaces the Chinese calculating rods. 4000 . 1300 1612-1614 John Napier uses the printed decimal point devises logarithms and uses numbered sticks or Napiers Bones for calculating. The Computer Museum 1623 William Wilhelm Schickard designs a calculating clock with a gear-driven carry mechanism to aid in multiplication of multidigit numbers. 1622 William Oughtred invents the circular slide rule on the basis of Napier s logarithms. 1666 In England Samuel Morland produces a mechanical calculator that can add and subtract. 1642-1643 Blaise Pascal creates a gear-driven adding machine called the Pascalene the first mechanical adding machine. .