Generations of the computer

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Generations of the computer : 

Generations of the computer A study guide

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2 1st Generation (1944 - 1958) : Vacuum Tubes Memory was made up of hundreds of vacuum tubes or sometimes magnetic drum Gave off so much heat that even if they were cooled by gigantic air conditioners. Input and output media were punched cards and magnetic tapes The machine was capable to do one job at a time, therefore batch processing was adopted. The language used by these computers was machine language and assembly language. Example of Computers: UNIVAC, IBM 650 etc. IBM Punched Card (input) Magnetic Tapes (output) Vacuum Tubes (memory)

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3 UNIVAC ENIAC

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4 an electronic switch that alternately allow or disallow electronic signal to pass, replaces vacuum tubes These transistors were made of solid material, some of which is silicon, therefore they were very cheap to produce Much smaller than vacuum tubes, draw less power, and generate less heat, conduct electricity faster. The orientation was towards multiple users i.e. the machine was capable to process multiple tasks concurrently. The high level languages like FORTRAN, COBOL, BASIC etc. were used as the languages by the computer. Example of Computers: IBM 1400 and 7000 series, General Electric 635 etc. 2nd Generation (1959 - 1964) : Transistor

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5 Minicomputer

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6 An electronic circuit that packages transistors and other electronic components into one small silicon chip called semiconductor. The number of transistors that is placed on a single chip has increased, shrinking both the size and cost of computers. Keyboards and monitors were used. Magnetic disks were used widely as secondary storage More advanced high level languages like PASCAL were used. Example of computers: IBM System 3rd Generation (1964 - 1970) : Integrated Circuit

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7 Minicomputer

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8 A silicon chip on which transistors are integrated onto it. Microprocessor can do all the processing of a full-scale computer – smaller in size , faster in speed. 4th Generation (1971-Present) : Microprocessor These circuit integrations are known as Large-scale integrated (LSI) and Very Large-scale integrated (VLSI) circuits Microprocessors led to the invention of personal computers. The application software for micro computer essentially became popular in this generation. Example of computers: IBM Systems

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9 Artificial Intelligence (AI) concerns with making computers behave and think like humans. The branch of computer science that deal with writing computer programs that can solve problems creatively AI studies include robotics, expert systems, games, etc.. 5th Generation (Present & Beyond) : Artificial Intelligence

Questions : 

10 Questions List the 5 generations of computers. Magnetic tapes and vacuum tubes were used in which generation? We are now in the _____ generation. Explain AI in your own words. What is a microprocessor? Processor = microprocessor = CPU ( T/F?)

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11 3 Directions of Computer Development  size Everything has become smaller  power Miniaturization allowed computer makers to cram more power into their machines, providing faster processing speeds and more data storage capacity.  expensive The price of the hardware is getting cheaper