history of computer, generations of computer

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  • 1.Information and Communication Technology ( ICT )

2. HISTORICAL BACKGROUND A. Brief History of Computer B. Early Developments in Electronic Data Processing C. Computer Generations 3. Objectives: To be familiar with the history, and the developments of computing devices. 4. Brief History of ComputerTHE EARLIEST COMPUTING DEVICES 5. The earliest data processing equipment were all manual mechanical devices due to the absence of electricity and adequate industrial technology. 6. ABACUS ( 300 B.C. by the Babylonians ) The abacus was an early aid for mathematical computations. Its only value is that it aids the memory of the human performing the calculation. 7. A very old Abacus 8. ABACUS A more modern abacus. Note how the abacus is really just a representation of the human fingers: the 5 lower rings on each rod represent the 5 fingers and the 2 upper rings represent the 2 hands. 9. John Napier ( 1550 1617 ) John Napier is best known as the inventor of logarithms. He also invented the so-called "Napier's bones" and made common the use of the decimal point in arithmetic and mathematics. Napier's birthplace, Merchiston Tower in Edinburgh, Scotland, is now part of the facilities of Edinburgh Napier University. After his death from the effects of gout, Napier's remains were buried in St Cuthbert's Church, Edinburgh. 10. NAPIER'S BONES In 1617 an eccentric Scotsman named John Napier invented logarithms, which are a technology that allows multiplication to be performed via addition. The magic ingredient is the logarithm of each operand, which was originally obtained from a printed table. But Napier also invented an alternative to tables, where the logarithm values were carved on ivory sticks. 11. An original set of Napier's Bones [photo courtesy IBM] 12. A more modern set of Napier's Bones 13. William Oughtred s Slide Rule William Oughtred and others developed the slide rule in the 17th century based on the emerging work on logarithms by John Napier. 14. Slide Rule 15. Blaise Pascal In 1642 Blaise Pascal, at the age of 19, he invented the Pascaline as an aid for his father who was a tax collector. Pascal built 50 of this gear-driven onefunction calculator (it could only add) but couldn't sell many because of their exorbitant cost and because they really weren't that accurate (at that time it was not possible to fabricate gears with the required precision). 16. Pascaline or Pascal Calculator It can be called Arithmatique Machine The first calculator or adding machine to be produced in any quantity and actually used. It was designed and built by the French mathematician-philosopher Blaise Pascal between 1642 and 1644. It could only do addition and subtraction, with numbers being entered by manipulating its dials. 17. A 6 digit model for those who couldn't afford the 8 digit model 18. A Pascaline opened up so you can observe the gears and cylinders which rotated to display the numerical result 19. Gottfried Wilhelm Leibniz (July 1, 1646 November 14, 1716)A German mathematician and philosopher. He occupies a prominent place in the history of mathematics and the history of philosophy. 20. Stepped Reckoner The Step Reckoner (or Stepped Reckoner) was a digital mechanical calculator invented by German mathematician Gottfried Wilhelm Leibniz around 1672 and completed in 1694. 21. Stepped Reckoner 22. Joseph Marie Jacquard (7 July 1752 7 August 1834)A French weaver and merchant. He played an important role in the development of the earliest programmable loom (the "Jacquard loom"), which in turn played an important role in the development of other programmable machines, such as computers. 23. The Jacquard Loom A mechanical loom, invented by Joseph Marie Jacquard, first demonstrated in 1801, that simplifies the process of manufacturing textiles with complex patterns such as brocade, damask and matelasse. The loom was controlled by a "chain of cards", a number of punched cards, laced together into a continuous sequence. 24. Jacquard's Loom showing the threads and the punched cards 25. By selecting particular cards for Jacquard's loom you defined the woven pattern 26. A close-up of a Jacquard card 27. This tapestry was woven by a Jacquard loom 28. Charles Babbage (26 December 1791 18 October 1871)By 1822 the English mathematician Charles Babbage was proposing a steam driven calculating machine the size of a room, which he called the Difference Engine. This machine would be able to compute tables of numbers, such as logarithm tables. 29. Babbages Differential Engine Designed to automate a standard procedure for calculating roots of polynomials 30. A small section of the type of mechanism employed in Babbage's Difference Engine 31. The Analytical Engine It was a proposed mechanical general-purpose computer designed by English mathematician Charles Babbage. 32. Babbages Analytical Engine 2 main parts: the Store where numbers are held and the Mill where they were woven into new results 33. Ada Lovelace Augusta Ada Byron, Lady Lovelace (10 December 1815 27 November 1852)English mathematician and writer chiefly known for her work on Charles Babbage's early mechanical general purpose computer, the Analytical Engine. Her notes on the engine include what is recognised as the first Algorithm intended to be processed by a machine. Because of this, she is often described as the world's first computer programmer. Referred to as the First Programmer 34. Herman Hollerith (February 29, 1860 November 17, 1929)An American statistician and inventor who developed a mechanical tabulator based on punched cards to rapidly tabulate statistics from millions of pieces of data. He was the founder of the Tabulating Machine Company that later merged to become IBM. Hollerith is widely regarded as the father of modern automatic computation. 35. Hollerith machine 36. Hollerith machine The first automatic data processing system. It was used to count the 1890 U.S. census. Developed by Herman Hollerith, a statistician who had worked for the Census Bureau, the system used a hand punch to record the data as holes in dollar-bill-sized punch cards and a tabulating machine to count them. The tabulating machine contained a spring-loaded pin for each potential hole in the card. When a card was placed in the reader and the handle was pushed down, the pins that passed through the holes closed electrical circuits causing counters to be incremented and a lid in the sorting box to open. 37. More Detail Each card was placed into this reader. When the handle was pushed down, the data registered on the analog dials. 38. Hollerith's Keypunch Machine All 62 million Americans were counted by punching holes into a card from the census forms. 39. What a Concept in 1891 Imagine. Using electricity to count. The date on this issue of "Electrical Engineer" was November 11, 1891. The page at the top is a census form filled out by a census taker. 40. High Tech, 1890 Style The beginning of data processing made the August 30, 1890 cover of Scientific American. The binary concept. A hole or no hole! (Image courtesy of Scientific American Magazine.) 41. EARLY DEVELOPMENTS IN ELECTRONIC DATA PROCESSING 42. Mark I developed by Howard Aiken at Harvard University 43. Mark I Official name was Automatic Sequence Controlled Calculator. Could perform the 4 basic arithmetic operations. 44. ENIAC Electronic Numerical Integrator And Calculator developed by John Presper Eckert Jr. and John Mauchly 1st large-scale vacuum-tube computer 45. EDVAC Electronic Discrete Variable Automatic Computer Developed by John Von Neumann a modified version of the ENIAC employed binary arithmetic has stored program capability 46. EDSAC Electronic Delay Storage Automatic Calculator built by Maurice Wilkes during the year 1949 one of the first stored-program machine computers and one of the first to use binary digits 47. UNIVAC Universal Automatic Computer Developed by George Gray in Remington Rand Corp.Manufactured as the first commercially available first generation computer. 48. IBM International Business MachinesBy 1960, IBM was the dominant force in the market of large mainframe computers 49. IBM 650 built in the year 1953 by IBM and marked the dominance of IBM in the computer industry. 50. IBM 701 IBMs 1st commercial business computer 51. GENERATIONS OF COMPUTER 52. FIRST GENERATION (1946-1959) Vacuum tube based The use vacuum tubes in place of relays as a means of storing data in memory and the use of storedprogram concept. It requires 3.5 KW of electricity per day to keep the vacuum tubes running 53. Per Day : 3.5 KWPer Week : 24.5 KWPer Month : 122.5 KWPer Year : 1,470 KWNAKAKALOKA!! 54. Generation in computer terminology is a change in technology a computer is/was being used. Initially, the generation term was used to distinguish between varying hardware technologies. But nowadays, generation includes both hardware and software, which together make up an entire computer system. 55. WHO INVENT THE VACUUM TUBES? First invented by a British scientist named John A. Fleming in 1919, although Edison had made some dsicoveries while working on the lightbulb. The vacuum tube was improved by Lee DeForest. 56. Vacuum Tubes 57. The main features of First Generation are: Vacuum tube technology Unreliable Supported Machine language only Very costly Generate lot of heat Slow Input/Output device Huge size Need of A.C. Non-portable Consumed lot of electricity 58. Some computers of this generation were: ENIAC EDVAC UNIVAC IBM-701 59. SECOND GENERATION (1959-1965) This generation using the transistor were cheaper, consumed less power, more compact in size, more reliable and faster than the first generation machines made of vacuum tubes. In this generation, magnetic cores were used as primary memory and magnetic tape and magnetic disks as secondary storage devices. 60. WHO INVENTED THE TRANSISTORS? The first transistor was invented at Bell Laboratories on December 16, 1947 by Wil