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History of Computers

Dec 31, 2015

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History of Computers. 1. Computer History. Manual Calculators Mechanical Calculators Computer Prototypes Generations of Computers Personal Computers. 2. Manual Calculators. - PowerPoint PPT Presentation

Computer History

The Computer Industry: History, Careers, and Ethics1History of Computers1The Computer Industry: History, Careers, and Ethics2Computer HistoryManual CalculatorsMechanical CalculatorsComputer PrototypesGenerations of ComputersPersonal Computers1The Computer Industry: History, Careers, and Ethics3Manual CalculatorsDevice that assists in the process of numeric calculations, but requires the human operator to keep track of the algorithm

133Figure 1-1The Computer Industry: History, Careers, and Ethics4Manual Calculators

Napiers Bones (left) evolved into the slide rule (right).

144Figure 1-2The Computer Industry: History, Careers, and Ethics5Mechanical CalculatorsImplements algorithms autonomouslySchickards CalculatorPascalineLeibniz CalculatordeColmars ArithmometerDifference EngineAnalytical EngineHollerith Tabulating Machine1The Computer Industry: History, Careers, and Ethics6Mechanical Calculators

166Figure 1-3The Computer Industry: History, Careers, and Ethics7Computer PrototypesAn experimental device that typically must be further developed and perfectedAtanasoff-Berry Computer (ABC)Z3

177Figure 1-4The Computer Industry: History, Careers, and Ethics8Computer PrototypesIBM Automatic Sequence Controlled Calculator (Harvard Mark I)COLOSSUSENIAC

188Figure 1-5The Computer Industry: History, Careers, and Ethics9Generations of ComputersUNIVAC is considered the first commercially successful digital computerFirst-generation computersVacuum tubesSecond-generation computersTransistors

199Figures 1-6 and 1-7The Computer Industry: History, Careers, and Ethics10Generations of ComputersThird-generation computersIntegrated circuitsRCA Spectra 70IBM 360DEC PDP-8IBM AS/400Fourth-generation computersMicroprocessor

11010Figure 1-8, 1-1The Computer Industry: History, Careers, and Ethics11Personal ComputersMark-8MITS AltairApple I / Apple IIVisiCalc

11111Figure 1-10, 1-11The Computer Industry: History, Careers, and Ethics12Personal ComputersIBM PCIBM PC XTApple LisaXerox AltoApple Macintosh

11212Figure 1-12, 1-13