HISTORY OF COMPUTERS Historical records will tell us that man has invented three types of devices to assist him in calculating and processing data. These devices could be classified into: a) Manual-mechanical b) Electromechanical c) Electronic 2000 BC - MECHANICAL COMPUTER THE ABACUS * Computations are done by sliding beads on a wire arranged on a tray. Came from the Greek word abax meaning flat surface John Napier(1617) – Logs and Bones * a Scotsman‚ invented
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History of Computers Table of Contents Table of Contents . .2 Abstract . 3 Body of Research .4 - 6 Conclusion . 7 Bibliography ..8 Abstract This project explains the history of computers‚ starting from Howard Aiken’s Harvard Mark I to present day time. Although I have not gone over all of the models in my report‚ I have chosen those which I feel have had the greatest effect on the computer world. I will show how in just forty years‚ computers
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------------------------------------------------- History of computing hardware ) Computing hardware is a platform for information processing. History of computing | Hardware | * Hardware before 1960 * Hardware 1960s to present * Hardware in Soviet Bloc countries | Computer science | * Artificial intelligence * Compiler construction * Computer science * Operating systems * Programming languages * Software engineering | Modern concepts | * Graphical user
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Brief History of Computers (A Look Back at Computing) Computers have become one of the most important parts of modern society. Nearly everything that is modern required or uses computer related technology in some way. But how did computers as we know them come to exist? Did someone sitting in his lab just one day say‚ "Aha! I’ve got it! The computer?! Well‚ no‚ that is not how this happened. Rather‚ many years of brilliant ideas and research from many different individuals contributed
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The History of the Computer Long before computers were invented‚ humans realized the need for them. The history of the Computer started about 2000 years ago with the abacus. It is a wooden rack holding two horizontal wires with beads strung on them and was one of the best calculating machines until the seventeenth century (PBS‚ 1). In 1835‚ English inventor‚ Charles Babbage came up with the idea of the Analytical Machine‚ a general purpose‚ fully programmed-controlled‚ automatic mechanical digital
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HISTORY OF COMPUTER Abacus - The First man-made computing device. - It can perform addition and subtraction - invented in China Pascal’s calculating machine/Pascaline - The first mechanical calculator - Invented by Blaise Pascal - Can perform addition & subtraction Leibnitz calculator - First general-purpose calculating machine - Extended version of Pascal Calculating machine - Can perform multiplication and Division - Invented by Gottfried Leibnitz Automatic
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1944(Destroyed) Cost: $6500 Size: Two 6’ x 3’ x1’ Memory racks Technology: Relays Memory : 64 22-bit floating point words Program: 35mm punched film Speed : 0.5 Operations per second Application: Circuit Analysis‚ defense‚ prototype Atanasoff-Berry Computer(ABC) Inventor : John V. Atanasoff Builder : Atanasoff and Berry Operational : 1942 Cost : $ 7000 Size : 6’ x 3’ x 3’ Technology : Tubes‚ capacitors‚ cards Memory : 64 50-bit words Program : Fixed‚ Matrix arithmetic calculator Speed : 32
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Date | Event | c. 2400 BC | The abacus - the first known calculator‚ was probably invented by the Babylonians as an aid to simple arithmetic around this time period. This laid the foundations for positional notation and later computing developments. | 1300 | Ramon Llull invented the Lullian Circle: a notional machine for calculating answers to philosophical questions (in this case‚ to do with Christianity) via logical combinatorics. This idea was taken up by Leibniz centuries later‚ and is thus
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The Evolution of the computer age First Generation (vacuum tube age) First computer called ENIAC (electronic numerical integrator and computer) completed in 1946. More advanced computers based on ENIACS called UNIVAC becomes available to purchase in 1951. IBM adds computer to its business and sells over 1000 IMB systems in 1951-1953. First software that converts language symbols into instructions that a computer can execute. Introduction of first programming language translator called FORTRAN
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HISTORY OF COMPUTERS The abacus was an early aid for mathematical computations. Its only value is that it aids the memory of the human performing the calculation. A skilled abacus operator can work on addition and subtraction problems at the speed of a person equipped with a hand calculator. The abacus is often wrongly attributed to China. In fact‚ the oldest surviving abacus was used in 300 B.C. by the Babylonians. The abacus is still in use today‚ principally in the far east. A modern abacus
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