Lec1 - Computer Basics "640K ought to be good enough...

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Computer Basics “640K ought to be good enough for anybody” —Bill Gates, 1981 First Calculators Abacus—Bi-quinary Code Programming 1801—Joseph Marie-Jacquard “Punched Card” Looms Automated Counting 1890—Herman Hollerith Punched card reader used by US Census Starts Tabulating Machine Company TMC becomes IBM Analog Computers 1930’s—Vannevar Bush Differential Analyzer Worked mechanically—pulleys, shafts, levers, gears MEMEX Bringing media and documents together and making them easier to look at—similar to intranet Digital Computers 1944— “The Harvard Mark 1”, the first “digital” computer is completed 1949 EDSAC—Electronic Delay Storage Automated Calculator 1 st to store information/programs first programable 1951 UNIVAC I-Universal 1 st commercially sold over million $ Technology 1950’s 1947—transistor Led to miniaturization of electronics 1970—integrated circuit Lead to first microprocessor
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Computer Classifications Mainframe: Supports many users Supercomputer: For Single application
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Lec1 - Computer Basics "640K ought to be good enough...

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